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JPS5424312

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Notice
This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate,
complete, reliable or fit for specific purposes. Critical decisions, such as commercially relevant or
financial decisions, should not be based on machine-translation output.
DESCRIPTION JPS5424312
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a circuit diagram showing only a portion
related to a light emitting element lighting control circuit from a light emitting element lighting
control circuit of a magnetic recording / reproducing apparatus with a radio receiver according
to one embodiment of the present invention; FIG. 3A is a waveform diagram for explaining the
operation of the light emitting element lighting control circuit, and FIG. 4 is a circuit diagram
showing another embodiment of the light emitting element lighting control circuit. . 2 и и и и и и и и и и
ииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииии
и и и и и и и и и и и и и и 13 .... Resistance, 18 ..... Capacitor
Detailed Description of the Invention No (? ?2 v 3 / ? 2) The present invention has a function
of receiving a stereo broadcast 1? function and at the time of stereo broadcast reception, emits
light emitting elements such as light emitting diodes to indicate that it is in a stereo reception
state The present invention relates to a magnetic recording and reproducing apparatus with a
receiver and a receiver, the purpose of which is to check a power supply voltage using the light
emitting element and a related circuit for making the light emitting element emit light. It is
Heretofore, as a method of checking whether the power supply voltage is sufficient or not, a
method using a moving coil type meter or a general method is generally used1. Since it can be
confirmed by the deflection of the pointer and it is most convenient, but it is a meter or
expensive, it is hardly used for the purpose of checking the power supply voltage in conventional
magnetic recording and reproducing devices with radio receivers, and many are The purpose, for
example, is used together with the purpose of monitoring the recording level, etc., and is used by
switching. However, for purposes other than the monitoring of the meter or recording level, for
example, the tuning instruction meter at the time of body radio reception-> also used as an
output meter at the time of reproduction and playback, the above meter when the device is in the
operating state. Is always in use and may not be available for voltage check 1. In such a case, it is
difficult to use an expensive meter separately for exclusive use of power supply voltage check.
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There is a device in which the light emitting element is turned on and the light emitting element
is turned off so that the power supply voltage can be checked when the light emitting element is
turned on and the power supply voltage decreases and becomes lower than a specified value.
However, when the power supply voltage is checked with a conventional light emitting element, a
separate light emitting diode is provided exclusively for checking the power supply voltage, and a
dedicated lighting circuit for the light emitting diode is also provided. Also, in the method of
checking the power supply voltage using such a light emitting diode, as described above, the light
emitting diode is only turned on or not in two states, and the degree of decrease in the power
supply voltage can not be known. There is a drawback of that. In view of such conventional
drawbacks, when the present invention checks the power supply voltage with the light emitting
element 1,... I, such as a light emitting diode, the light emitting element for stereo display can be
used separately. 'No light emitting element and no light circuit for the light emitting element are
newly provided. By devising the lateral hole of the lighting circuit of the light emitting element r
for stereo display, the check of the city source Deno can be performed, and the city source 1 It is
intended to be able to confirm the degree of decline of the m.
Hereinafter, the present invention will be described with reference to the drawings. First of all,
FIG. 1 is a schematic diagram showing a part of a part of the radio display according to the
present embodiment 5 from the lighting circuit of all photodiodes of the radio reception
scratched / aerated recording re-T neck of this embodiment. 1 is an integrated и UL path for
stereo signal demodulation, and it is a pilot signal, one more choice! 1 path, amplifier 2 including
rectification 1'i'g, shimmit "Go 1. Path 3, transistor 4 for light-emitting diode lighting W'if'll,
terminal F; 6, 7.8 and other circuits not shown, other terminals, terminals. Terminal 5 (or stereo
signal detection terminal 1 input terminal 1 terminal 6 (A terminal that is a hair ground via a
cono amplifier is a terminal that is Fl ground, terminal 7 is an interview-grounded terminal r1
terminal 8 is a stereo display circuit control It is. 9 emits light when receiving a stereo broadcast.
O Display H: Light-emitting diode, 10 is a normally open type switch closed in conjunction with
the operation of the playback operation button (not shown) at the time of recording, at the time
of recording, anti-heavior, anti-heavior, 111'1. Reference numeral 12 denotes a radio receiver,
and a function changeover switch for switching between the stereo broadcast reception function
of one unit and the reproduction function of the magnetic recording / reproducing apparatus
unit. The fixed terminal 12a is a power supply voltage check position, and the fixed terminal 12b
is a radio reception position, fixed. The terminal 12C is the reproduction function position. In FIG.
1, 13 is a power supply. When the detection output of the stereo broadcast signal is input to
terminal 5 of integrated circuit 1 for demodulation, the pilot signal bow in the detection output is
amplified and rectified by amplifier 2 and then rectified. The power of the mitt circuit 3 is used.
As is well known, the output of the circuit inverts to 5 when given a manual power of a fixed
value or more, and it exceeds the D level of a pintock signal level in the detection output. And 7 =
mini y) circuit 3 suddenly inverts and functions as a non-conductive state (turns transistor 4 into
conductive state and holds it at this size) 1, so that from power supply 13 to function switch 12
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2
of From the fixed terminal 12b to the movable terminal, the resistor 10, the collector of the lightemitting diode 9 transistor / distor 4 and the emitter [A current flows to the ground side and the
light-emitting diode is lit. If the level of the pilot year in the stereo signal detection output or the
level when the light emitting diode 9 turns on becomes lower than a predetermined number
lower than a certain predetermined number, the reverse circuit 3 or the original state is reversed.
The transistor 4 returns to the non-conductive state and the light emitting diode 9 is turned off.
Here, the pilot f when the light emitting diode 9 is turned on and the power level when the light
emitting diode 9 is turned off In this case, the smaller car of the signal input is smaller due to the
characteristics of the shimmit circuit 3 used in the four embodiments, but it is easily possible to
make the reverse relation, as shown in FIG. Is the entire circuit of the present embodiment in
which the power supply voltage is checked 17 using the circuit shown in FIG. The function
changeover switch interlocked with the function changeover switch 12 and has the same
function as the fixed terminals 14a to 14ci and the fixed terminals -12a to 12c of the i function
changeover switch 12. 15.16 is a dividing resistance, 1 i-1 is a diode for separating,], 7 the diode
18 is not particularly necessary to use unless or influence of the resistance 16.
In addition, the same reference numerals as in FIG. 1 are attached to the same reference
numerals 1 and in FIG. 2, the function changeover switch 12.14 is switched to the fixed terminal
14a side when the power supply check is performed. In this state, when the playback button is
operated to close the switch 11, the power supply voltage is supplied from the identification
terminal 14a of the resistor 10 switch 14 through the movable terminal to the resistor 15, which
is divided by the resistors 15 and 16 and then the diode The terminal 6 of the integrated circuit
1 is connected to the input terminal of the light emitting diode circuit 3 through the terminal 17,
and the capacitor 18 is connected to the terminal 6 through the capacitor tr, so the terminal 60
input voltage is shown in FIG. In the case of FIG. 3A, which changes as ?-?>, H, A is a case of
high voltage and B is a case of low voltage. Further, vH55L is an operation level of the Schmitt
circuit 3, and vH indicates an input level when the light emitting diode 9 is turned on or an input
level when light is turned off. If the power supply voltage is quotient first, the capacitor is
charged at a point a-1 or 5 point 1. The point is that the light emitting diode 9 does not turn on
and the point goes beyond point b / Juminoto circuit The light emitting diode 9 is turned on, and
the light emitting diode 9 is turned on. At this time, since the potential at the connection point
between the light emitting diode 9 and the resistor 10 is lowered, the voltage fl is divided by the
resistors 15 and 16 and the voltage applied to the terminal 6 through the diode 17 is set to be
less than n L. The Ichikawa of terminal 6 gradually decreases from point b in FIG. 3 to point 0, or
during this period, light emitting diode 9 is turned on. -1 Next, when the voltage at the terminal 6
becomes lower than the 0 level of the VL, the ON-minto circuit 3 reverses again, the transistor 4
becomes non-conductive and the light emitting diode 9 is turned off6. At this time, the power
generating diode 9 and the resistor 10 The potential at the connection point rises, and the light
emitting diode auto 9 is turned on to repeat this light off 9 lighting operation or the cycle is T1
as shown in FIG. Next, when the power supply voltage is low, it becomes like a small B in Fig. 3 of
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3
earth + d of insulator 6, but the difference between A and B is that the circuit constant is the
same and the power supply voltage is different, or different. The difference in the charging time
of 2; 9 in other words, the difference in the light off time of the light emitting diode 9; 3, the
blinking cycle when the power supply voltage is low is T2 as shown in FIG. As is clear from the
explanation of one or more cases where the voltage becomes high and the flash period T1
becomes longer, the flash period of the light emitting diode 9 is delayed with the decrease of the
power supply voltage, and the power supply voltage further decreases. If an input of H or more-L
is not given, the light emitting diode suddenly extinguishes -1, so that it can serve the purpose as
a power supply voltage check.
Although the extra switch portion of the function changeover switch 12 is used as the stop
switch 14 in the embodiment of FIG. 2, when there is no excess in the number of circuits of the
function changeover switch 12, the function changeover switch 12 is used as shown in FIG. It is
also possible to use itself. In this case, when the diode 19 is at the position of the switch 12 or
the fixed terminal 12b, that is, when the reception function of the stereo broadcast is used, the
light emitting diode 9 is not blinked, and the resistor 20 is a connection between the light
emitting diode 9 and the resistor 1o. is for taking out a potential change ... ? of point 1, "of the
circuit shown in FIG. 4 AIL! A (10 blinking state will be omitted because it can be easily
understood from the explanation of FIG. Alternatively, a dedicated switch for checking the power
supply voltage may be used. The above explanation was made about the method of performing
the power supply voltage check by making the light emitting diode 9 blink and delaying the
blinking cycle according to the decrease of the power supply weight, or the light emitting diode 9
is made to blink. When performing a power supply type one-dimensional check, it is better to
connect the solid-state terminal 14 side of the function changeover switch 14 in FIG. 2 to the
connection point of the light emitting diode 9 and the resistor 1o and directly connect it to
electricity. As for the cycle to blink the light emitting diode 9, if it is set to a cycle that can not be
sure to blink when the power supply voltage is high enough to be close to the rated Ichikawa, it
will always be lit when the power source is above a certain value. More practical than the
appearance 1, the description of the bottom-even if light emitting diode is used as a light emitting
element or can be replaced by a lamp, etc. may be measured. As described above, according to
the present invention, the radio receiver with magnet according to the present invention, a light
recording / reproducing apparatus, a light emitting element for stereo display indicating that it is
a stereo broadcast or 11) and its lighting control circuit 11 The power supply voltage can be
checked using the power supply voltage, and the degree of reduction of the power supply voltage
can also be determined by changing the flashing cycle of the light emitting element according to
the level of the power supply voltage. You can check the voltage.
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