close

Вход

Забыли?

вход по аккаунту

?

Патент USA US2407725

код для вставки
Sept. 17, 1946.
D. R. RASLEY‘
2,407,724
VOLTAGE RECTIFIER
Filed may 29, 1944
‘ INVENTORI
DONALD R.RASLEY
ATTORNEY
Patented Sept. 17, 1946
2,407,724
UNITED STATES PATENT‘ OFFICE
2,407,724
VOLTAGE RECTIFIER
Donald R. Rasley, Fort Wayne, Ind., assignor to‘
Farnsworth Television and Radio Corporation,
a corporation of Delaware
Application May 29, 1944, Serial No. 537,917
11 Claims. (Cl. 1'71—97)
1
2
This invention relates to power supply appa
ratus and particularly to apparatus of this char
acter wherein the supply voltage is divided
components are used in association with the
higher multiplier stages where the electron cur
rent densities are relatively large. In this man
ner it is possible to provide accelerating voltages
for the electron multiplier stages which are sub
among a plurality of loads.
In the operation of multistage electron multi
pliers it is the conventional practice to derive
the accelerating voltages for the secondary elec
stantially constant, irrespective of ?uctuations
in the current densities representing intelligence
tron emissive multiplier electrodes from a volt
age divider which is connected across a source
signals and at the same time to minimize the
consumption of power from the source of energy
of direct current energy.
for the voltage divider.
The voltage which is
developed in each divider component is depend~ 10
ent upon the total current ?ow in that component.
The total current ?ow consists of the circulating
current through the divider component from the
Inasmuch as the energy source most conven
iently used with apparatus of the character de
scribed consists of recti?ed alternating current
energy it becomes necessary to adapt such a
power supply suitably to provide energy to a load
tween the associated multiplier electrodes where 15 consisting of both relatively high and low im
it is desired that the multiplier have a substan
pedance elements. For certain television appli
tially linear response, it is necessary that the
cations the unidirectional power supply also
energy source and. the electron current ?ow be- _
interelectrode accelerating voltages be main
tained at substantially constant values. In order
to e?ect this result the circulating current
through the respective voltage divider compo
nents must be considerably greater than the as
sociated interelectrode electron current. In this
manner fluctuations of the electron current due _
to signal variations have little or no effect upon
the voltage drop in the respective divider com
voltage
ponents. divider
In order
consisting
to achieve
of equal
this end
impedance
with
components, the components must have relay
tively low values of impedance.
However, as is Well known in the art, a volt
age divider made up entirely of relatively low
impedance components consumes considerable
power from the source of energy.
Inasmuch as
the voltage developed in some of the divider com
ponents is not subject to appreciable variation
by reason of variations of the electron current
serves as the source of scanning voltage for the
de?ector elements.
Devices of this character
used heretofore have been required to deliver en
ergy to only one load.
It, therefore, is an object of the present inven
tion to provide a power supply for a load circuit
consisting of a plurality of impedance elements.
In accordance with this invention there is pro
vided a source of periodic impulses from which is
to be developed a substantially constant unidi
rectional voltage. A plurality of energy storage
devices are employed. The energy storage de
vices are connected to different voltage points of
the impulse source. There is provided impulse
controlled means for storing energy in the re
spective storage devices. There'also is provided
a plurality of circuits connected to the respective
storage devices for dissipating the energy stored
therein. Preferably, the dissipation circuits are
connected in series.
For a better understanding of the invention,
flow between the associated multiplier electrodes,
it is not necessary that the impedances of these 40 together with other and further objects thereof,
divider components be of relatively small values.
reference ‘is had to the following description,
Such a condition is particularly true in the initial
taken in connection with the accompanying
multiplier stages where the magnitude of the elec
drawing, and its scope will be pointed out in the
tron current flow is comparatively small. ‘
appended claims.
It, therefore, has become the practice to em
In the following drawing:
ploy a voltage divider consisting partly of a group '
of relatively low impedance components and
partly of a group of relatively high impedance
components. One such arrangement is disclosed
in a copending application of Donald R. Rasley,
Serial No. 512,541, ?led December 2, 1943. The
relatively high impedance divider components
are used in association with the lower multiplier
stages where the electron current densities are
Fig. 1 is a circuit diagram of apparatus en.
' bodying the invention in one form; and,
Fig. 2-is a circuit diagram of apparatus em
bodying the invention in a modi?ed form.
Having reference now particularly to Fig. 1 of
the drawing, the source of impulses disclosed is
a relaxation oscillator, including a vacuum tube
II. _ The anodeand cathode of this tube are con
nected externally by a series circuit, including
relatively small and the relatively low impedance 55 an inductive winding such as a coil I 2 and a
2,407,724
4
3
source of direct current energy such as a bat
tery I3. The positive terminal of this battery
is connected through the coil I 2 to the tube anode
and. the negative terminal is connected to ground.
A coil I 4 inductively coupled to the anode coil I2
is connected in series with a resistor I5 between
the control grid and cathode of the tube II.
The relatively high voltage terminal of the coil
has been dissipated from the condensers I6 and
I9 is replaced during the relatively short periods
of current decay in the coil I2. The described
cycle of operation then is repeated.
By suitable design the described circuit is ef
fective to maintain a substantially constant uni.
directional voltage across the load circuit, includ
ing the resistors I1 and I8. These load resistors
may comprise a voltage divider from which suit
i 2, which is connected to the anode of the tube
II, is coupled by means of a condenser I6 to one 10 able potentials may be tapped for impression upon
the secondary emissive electrodes of a multistage
electron multiplier. The relatively high imped
such as a resistor IT. This resistor is connected
- ance resistor Il may be associated with the lower
in series with a relatively low impedance element
multiplier stages and the relatively low imped
such as a resistor I8. A relatively low voltage
intermediate tap or terminal of the coil I2 is 15 ance I8 may be coupled to the higher multiplier
stages. In this manner the circulating current
coupled by means of a condenser I9 to the junc
through the‘ load resistor I‘! may be maintained
tion point between the load resistors I1 and‘ I8.
at a relatively low value and the circulating cur
A recti?er tube 2|, having its anode connected
rent through the resistor I8 may be maintained
to the coupling condenser I6, is connected in
at a sufficiently higher value so that the voltages
parallel with the high impedance load resistor
developed in this resistor are not a?ected mate
I'I. Another recti?er tube 22, having itsanode
rially by the interelectrode electron currents of
connected to the coupling condenser I9, is con
terminal of a relatively high impedance element,
nected in parallel with the relatively low imped
substantial magnitudes.
ance load resistor I8.
Referring now to Fig. 2 of the drawing, the
apparatus embodying the instant invention is
essentially the same as that shown in Fig. 1.
Corresponding characters of reference are used in
the two ?gures to designate similar apparatus.
In this modication of the invention the only es
sential di?erence between that described in con
nection with Fig. 1 is that the recti?er 2| is con
nected in parallel with both of the load resistors
Referring now to the operation of the apparatus
shown in Fig. 1, a brief consideration will be
given to the impulse generator including the re
laxation oscillator. The coupling between coils
I2 and I4 is regenerative so that, during periods
of current increase in the coil I2, the control
grid of the tube I I is biased so as to maintain
the tube conducting. Also, during periods of cur»
rent increase in the coil I2, the anode voltage
of the tube is maintained at a substantially con
stant value. At a critical interelectrode voltage
I1 and IB.
-
There also is no material difference in the mode
the current through the tube II and the coil I2
of operation of the apparatus of Fig. 2 from that
of Fig. 1. The dissipation circuits for the respec~
ceases to increase and, as a consequence, the con
tive condensers I6 and I9 are the same as those
shown in Fig. 1. Instead of utilizing only the
trol grid of the tube becomes negatively biased
higher voltage portion of the impulses developed
and current conduction through the tube and the
coil I2 is interrupted. As a result of the rapid 40 in the coil I2 to restore the energy content of
the condenser I6, in this case the full voltage is
decay of current in the coil I2 there is developed
utilized. It is believed unnecessary to describe
at the anode of the tube II an impulse of posi
in any greater detail the operation of this modi
tive polarity and of considerable voltage. At the
?-cation of the invention.
same time similar impulses are developed in all
Values of the circuit components of apparatus
parts of the coil I2, the voltage thereof being of 45
in accordance with this invention necessarily will
increasingly lesser magnitude the farther removed
depend upon the particular requirements of ap
from the anode is the coil portion in which they
paratus of this character. Without intending to
are developed.
limit the invention in any manner, the following
During periods of current increase in the coil
I2, when the anode voltage of the tube I I is being 50 table of values of the more important circuit
elements is given by way of example for the de
maintained at a substantially constant value,
velopment from a source of approximately 14,000
the energy stored in the condenser I6 is dissi
impulses per second of a power supply to furnish
pated through the load resistors I1 and I8. The
1,500 volts at a current drain of 1 milliampere in
rate at which this energy is dissipated depends
a relatively high impedance load such as the re
upon the time constant of the discharge circuit
sistor I1 and also 1,000 volts at a current drain
which is a function of the size of the condenser
of 10 milliamperes in a relatively low impedance
I6 and also of the value of the load resistors I1
load such as the resistor I8.
and I8. Inasmuch as the value of the former is
considerably greater than that of the latter, the
effect of the latter upon the dissipation rate is 60 Condenser l6 _______________ _- 0.001 microfarad
Resistor I'I _________________ __ 2 megohms
negligible. Similarly, the energy stored in the
Resistor l8 _________________ __ 0.1 megohm
condenser I9 is dissipated through the relatively
Condenser I9 _______________ _. 0.02 microfarad
low impedance resistor I8 during periods of curRecti?er tube 2I ____________ _. 8016
rent increase in the coil I2. This dissipation rate
Rectifier 22 ________________ __ 6H6
is a function of the value of the condenser Iii!
and also of the resistor l8. By properly choosing
While there has been described What, at pres
the time constant determining elements of these
out, are considered the preferred embodiments of
two circuits the respective rates at which the
the invention, it will be obvious to those skilled
energy stored in the condensers i6 and I9 may
be made substantially equal.
70 in the art that various changes and modi?cations
may be made therein without departing from the
During periods of current decay in the winding
I2 the relatively high voltage impulses developed
invention, and therefore, it is aimed in the ap
pended claims to cover all such changes and
at the anode terminal and at the intermediate
modi?cations as fall within the true spirit and
terminal of the coil render the recti?ers 2| and
scope of the invention.
22 conducting. In this manner the energy which
2,407,724
5
6
What is claimed is:
l. A unidirectional power supply comprising, a
source of impulses, a plurality of energy storage
devices, one of said storage devices being con
nected to a relatively high voltage point of said
impulse source and another of said storage de
vices being connected to a relatively low voltage
point of said impulse source, means controlled by
said impulses for storing energy in said storage
devices, and a plurality of dissipation circuits
connected respectively to said energy storage
devices.
2. A unidirectional power supply comprising, a
source of impulses, a plurality of energy storage
devices, one of said storage devices being con 15
nected to a relatively high voltage point of said
impulse source and another one of said storage
the development of a series of voltage impulses, a
load circuit including a relatively high impedance
element and a relatively low impedance element,
a ?rst condenser connected between one terminal
of said relatively high impedance element andva
high voltage portion of said output circuit, a sec
ond condenser connected between one terminal
of said relatively low impedance element and a
low voltage portion of said output circuit, means
connected in parallel with said relatively high
impedance element and controlled by said im
pulses ior charging said ?rst condenser, and
means connected in parallel with said relatively
low impedance element and controlled by said im
pulses for charging said second condenser.
7. A unidirectional power supply comprising, a
relaxation oscillator having an output circuit im
pedance device for the development of a series of
voltage impulses, a load circuit including a rela
devices being connected to a relatively low voltage
point of said impulse source, means controlled
by said impulses for storing energy in said storage 20 tively high impedance element and a relatively
low impedance element, a ?rst recti?er connected
devices, and a plurality of dissipation circuits
in parallel with said relatively high impedance
connected respectively to said energy storage de
element and capacitatively coupled across a high
vices, one of said dissipation circuits being of
voltage portion of said output circuit impedance
relatively high impedance and another of said
dissipation circuits being of relatively low im
device, and a second recti?er connected in par
allel with said relatively low impedance element
pedance.
and capacitatively coupled across a low voltage
3. A unidirectional power supply comprising, a
source of impulses, a ?rst energy storage device
portion of said output circuit impedance device.
8. A unidirectional power supply comprising, a
said impulse source, a second energy storage 30 relaxation oscillator having connected in the out
put circuit thereof an inductive winding for the
device connected to a relatively low voltage point’
connected to a relatively high voltage point of
of said impulse source, means controlled by said
development of a series of voltage impulses un
impulses for charging said energy storage devices,
means including a relatively high impedance cir
der the control of relatively rapid current
changes therein, a load circuit including the se
ries connection of a relatively high impedance
cult for dissipating energy stored in said ?rst ‘
storage device, and means including a relatively
low impedance circuit in series with said relatively
high impedance circuit for dissipating energy
stored in said second storage device.
a ?rst recti?er tube connected in parallel with
said relatively high impedance element and ca
4. A unidirectional power supply comprising, a
relaxation oscillator having an output circuit im
pedance device for the development of a series
of voltage impulses, a ?rst condenser connected
tube connected in parallel with said relatively low
impedance element and capacitatively coupled
element and a relatively low impedance element,
pacitatively coupled across a high voltage portion
of said inductive winding, and a second recti?er
across a load voltage portion of said inductive
winding.
to a relatively high voltage point of said output
45
?ers each connected to one of said condensers
9. A unidirectional power supply comprising, a
relaxation oscillator having an output circuit for
the development of a series of voltage impulses,
a load circuit including a relatively high imped
and controlled by said impulses for charging said
condensers, a relatively high impedance energy
ance element and a relatively low impedance ele
ment, at ?rst condenser connected between one
issipation circuit connected to said ?rst con
denser, and a relatively low impedance energy
dissipation circuit connected in series with said
terminal of said relatively high impedance ele
said relatively high impedance element and also
with said relatively low impedance element and
connected to said second condenser.
6. A unidirectional power supply comprising, a
capacitatively coupled across a low voltage por
tion of said output circuit impedance device.
circuit impedance device, a second condenser con
nected to a relatively low voltage point of said
output circuit impedance device, a pair of recti
ment and a high voltage portion of said output
circuit, a second condenser connected between
relatively high impedance dissipation circuit and
one terminal of said relatively low impedance ele
also connected to said second condenser.
55 ment and a low voltage portion of said output
5. A unidirectional power supply comprising, a
circuit, means connected in parallel with both
relaxation oscillator having connected in the out
of said impedance elements and controlled by
put circuit thereof an inductive Winding for the
said impulses for charging said ?rst condenser,
development of a series of voltage impulses under
and means connected in parallel with said rela
the control of relatively rapid current changes
tively low impedance element and controlled by
therein, a ?rst condenser connected to a rela
said impulses for charging said second condenser.
tively high voltage point of said inductive wind
10. A unidirectional power supply comprising,
ing, a second condenser connected to a relative
a relaxation oscillator having an output circuit
ly low voltage point of said inductive winding, a
impedance device for the development of a series
pair of recti?er tubes, each connected to one of 65 of voltage impulses, a load circuit including a
said condensers and controlled by said impulses
relatively high impedance element and a rela
for charging said condensers, an energy dissipa
tively low impedance element, a ?rst recti?er con
tion circuit including a relatively high impedance
nected in parallel with both of said impedance
element connected to said ?rst condenser, and an
elements and capacitatively coupled across the
energy dissipation circuit including a relatively 70 terminals of said output circuit impedance de
low impedance element connected in series with
vice, and a second recti?er connected in parallel
relaxation oscillator having an output circuit for
11, A unidirectional power supply comprising,
2,407,724‘
7
8
a relaxation oscillator having connected in the
output circuit thereof an inductive winding for
the development of a series of voltage impulses
under the control of relatively rapid current
changes therein, a load circuit including the se
ries connection of a relatively high impedance
‘element and a relatively low impedance element,
a ?rst recti?er tube connected in parallel with
said load circuit and capacitatively coupled across
the terminals of said inductive winding, and a
second recti?er tube connected in parallel with
said relatively low impedance element and ca
pacitatively coupled across a low voltage portion
of said inductive winding.
DONALD R. RASLEY.
Документ
Категория
Без категории
Просмотров
0
Размер файла
578 Кб
Теги
1/--страниц
Пожаловаться на содержимое документа