close

Вход

Забыли?

вход по аккаунту

?

JPS57175000

код для вставкиСкачать
Patent Translate
Powered by EPO and Google
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 JPS57175000
Specification L Title of Invention
Stereo playback device
3. Detailed Description of the Invention The present invention does not use the center channel
amplifier, but the antiphase components of the left channel (hereinafter referred to as L-CH)
amplifier and the right channel (hereinafter referred to as RC) I). The present invention relates to
a stereo reproduction apparatus configured to reproduce a center channel speaker. FIG. 1 is a
circuit diagram of a conventional stereo reproduction apparatus. In FIG. 1, L is an L-CH ang, R is
an R-CH amplifier, and C is a center channel amplifier. The L-CH amplifier L is connected to the
non-inverting input end ((+) input end of the force amplifier 3) of L-CH signal source 1 via L-CH
signal source 1 via signal source resistance 2 and coupled EndPage: A center channel amplifier C
is connected to a non-inverted input terminal of a center channel power amplifier / amplifier 8
through a resistor 6. The inverting input terminal ((-) input terminal) of the L-CH power amplifier
3 in the L-CM amplifier L is grounded through the feedback resistor 4 and the feedback resistor
5 is connected between the input terminal and the output terminal. ing. This output end is
connected to one end of the L-CH speaker 23 via the capacitor 21. The other end of the L-CH
speaker 23 is grounded, and the coil 22 is connected to both ends thereof. The capacitor 21 and
the coil 22 constitute a filter. Similarly, the R-CH signal source 11 in the R-CH amplifier R is
connected to the non-inverting input terminal of the R-CM power amplifier 13 through the signal
source resistor 12 and the center in the center channel amplifier C through the coupling resistor
7. It is connected to the non-inverting input of the channel power amplifier 8. The inverting input
end of the R-CH power amplifier 13 is grounded via the feedback resistor 14, and the feedback
resistor 15 is connected between the input end and the output end. The output end of the R-CH
power amplifier 13 is connected to one end of the R-CH speaker 43 via a capacitor 41. The other
10-05-2019
1
end of the R-CH speaker 43 is grounded, and a coil 42 is connected to both ends thereof. The
capacitor 41 and the coil 42 constitute a noise filter. The inverting input of the center channel
power amplifier 8 of the center channel Anzo C is grounded via a feedback resistor 9, and a
feedback resistor 10 is connected between the input and the output. An output end of the center
channel power amplifier 8 is connected to a center channel speaker 34 via a coil 31. A capacitor
33 is connected to both ends of the center channel speaker 34.
The coil 31 and the capacitor 33 constitute a gyro 79 filter. Next, the operation of the
conventional stereo reproduction apparatus shown in FIG. 1 will be described. The signal from LCH signal source 1 is applied to the non-inverting input of L-CH power amplifier 3 through signal
source resistor 2. The applied signal is amplified by the feedback resistor 4.5 at the output
terminal of the L-CH power amplifier 3 in the form of the same phase as the input signal and
output. This output drives the L-CH speaker 23 through a bypass filter with the capacitor 21 and
the coil 22. Similarly, the signal from R-CH signal source 11 is applied to the non-inverting input
of R-CM power amplifier 13 through source resistor 12. This applied signal is negatively
feedback-effected by the feedback resistor 14.15, and an amplified output signal in phase with
the input signal appears at the output of the R-CH power amplifier 13. This output signal drives
the R-CH speaker 43 through the Nohay pass filter by the capacitor 41 and the coil 42. Also, the
signal from L-CH signal source 1 and the signal from R-CH signal source 11 are combined by
coupling resistors 6, 7), applied to the non-inverting input of center channel power amplifier 8
and added. This signal is subjected to a negative feedback effect by the feedback resistor
9.degree. 10 and appears amplified at the output of the center channel power amplifier 8 in the
same phase as the input signal. An output signal of the center channel power amplifier 8 is
driven by a coil 31 and a capacitor 33 to drive a center channel speaker 34 through a filter and a
filter. Since the low-frequency component of the L-CH doubled signal R-CH doubled signal
composite signal is reproduced by the center channel speaker 34 through the center channel
power amplifier 8 by the above operation, rich in low frequency range Stereo playback is
possible. Since the conventional stereo reproduction apparatus is configured as described above,
in order to perform rich low-frequency reproduction, a center channel amplifier C dedicated to
low-frequency reproduction in addition to L-OH anf L and R-CH amplifier R In addition, since an
L-CM multiplication signal R-CH multiplication signal synthesis circuit and the like are required,
there is a drawback that the price becomes high. The present invention has been made to
eliminate the above-mentioned drawbacks of the prior art, and by providing a phase rotation
circuit in the input circuit of one channel's power amplifier, the output end of the L-cHi force
amplifier and the R A center channel power amplifier is provided so that a voltage difference due
to phase rotation is generated between the output end of the CH power amplifier, and EndPage:
2, not including the output end of the L-CH power amplifier and the R-CH power amplifier. It is
an object of the present invention to provide a stereo reproduction apparatus capable of
reproducing a jDL-CH doubled signal R-cH doubled signal synthesis low-frequency component by
a speaker connected between output terminals.
10-05-2019
2
Hereinafter, an embodiment of a stereo reproduction apparatus of the present invention will be
described based on the drawings. FIG. 2 is a circuit diagram showing the configuration of one
embodiment. In FIG. 2, in order to avoid duplication, the same reference numerals are given to
the same parts as in FIG. 1 and the explanation thereof is omitted, and parts different from FIG. 1
will be mainly described. The embodiment of FIG. 2 shows the case where the low-frequency
phase rotation circuit of the frequency characteristic is provided in the L-CH anno L, and the RCH amplifier ?? is configured in the same manner as FIG. The same parts as those in FIG.
Further, the center channel amplifier C in FIG. 1 is omitted. In the L-CH amplifier L, the L-CH
signal source 1 is connected to the non-inverting input terminal of the L-CH * power amplifier 3
via the signal source resistor 2 and the low-pass phase rotation circuit 51. The other
configuration of this L-CM amplifier L is the same as that of FIG. The output end of the L-CH 4 IE
power amplifier 3 is connected to one end of the L-CH speaker 23 (7) via the koni / f-n tj 21 and
the other end of the L-CH speaker 23 is grounded and the L-CH speaker 23 A coil 22 is
connected to the both ends of the two, and the coil 22 and the capacitor 21 constitute a system
bypass filter. The connection relationship of the low noise filter L-CH slider 23 is the same as that
in FIG. Similarly, the output end of the R-CHt power amplifier 13 is connected to the R-CH
speaker 43 (connected to one end of the D-RC) via the 17 differential 41, and the other end of
the 1 speaker 43 is grounded. There is. A coil 42 is connected to both ends of the R-CH speaker
43, and a coil bypass filter is formed between the coil 42 and the capacitor 41. The connection
relationship with the Hino or Thifi I 'R-cH speaker 43 is the same as that in FIG. Furthermore, the
output end of the L-CH power amplifier 3 is connected to one end of the center channel speaker
3417 via the coil 31, and the other end of the center channel speaker 34 is the R-CH power
amplifier 13 via the coil 34. Connected to the output end of. A capacitor 33 is connected to both
ends of the center channel speaker 34. The capacitor 33 and the coil 31. 32 constitute a low pass
filter. Next, the operation of the stereo reproduction apparatus of the present invention
configured as described above will be described. The signal from the L-CH signal source 1 in the
L-CH amplifier L is subjected to a phase change by the low-pass phase rotation circuit 51 until
only the low-pass signal portion is in reverse phase (180 ░ rotation). It is applied to the noninverting input terminal of the CH power amplifier 3.
This applied signal is subjected to a negative feedback effect by the feedback resistors 4 and 5
and appears at the output end in phase with the input signal, but only the low frequency
component is already reversed by the low frequency phase rotation circuit 51 at the input side.
Because they are in phase, they are also out of phase with the input signal at the output. .
Meanwhile, the signal from the R-CH signal source 11 in the ? -CH amplifier R passes through
the signal source resistor 12 and is applied to the non-inverting input of the R-CH power
amplifier 13. The signal applied to the non-inverted input terminal of the R-CH power amplifier
13 receives the negative feedback effect by the feedback resistor 14.15 and appears at the
10-05-2019
3
output terminal in phase with the input signal. Because it operates as above, the output of L-CH
power amplifier 3 is a capacitor? ??? The L-0M speaker 23 is driven via the bypass filter by
the coil 22. Similarly, the output of the R-CH power amplifier 13 drives the R-CH speaker 43
through a pass filter with a capacitor 41 and a coil 42. In the center channel speaker 3, coils 31
and 32 and capacitors 33. ! The L-CH multiplied signal from the output end of the L-C) I power
amplifier 3 is converted from the output end of the R-CH power amplifier 13 via the low-pass
filter according to :. At this time, although the L-CM multiplication signal R-CH multiplication
signal contents are different, since they are in the same phase, only the low frequency
component phase-rotated to the opposite phase at the input of the L-CH power amplifier 3 is
output It flows as a current. EndPage: 3 Therefore, the center channel speaker 34 reproduces a
mixed component of low frequency components of the L-OH signal and the R-OH signal, so that
rich stereo reproduction of low frequencies becomes possible. In the above embodiment, the LCM power amplifier 3.degree. R-elf (t7 + amplifier is a non-inverting amplifier, but an inverting
amplifier may be used for these power amplifiers. Further, as shown in FIG. 3, the low-pass phase
rotation circuit 51.52 is provided at each of the input part of the L-CH power amplifier 3 and the
R-CM power amplifier 130, and the phase relationship of the low-pass component is You may be
in reverse phase. Furthermore, as shown in FIG. 4, the L-?H / # l L power amplifier 3 for power
amplification 3 uses an inverting type amplifier of reverse phase to the input, and is high at the
input of R-CH power amplifier 13 The same effect as that of the above-described embodiment
can be obtained also in the case where only the high frequency component is phase-rotated to
the reverse phase by the high frequency phase rotation circuit 61 using the non-inversion type
amplifier having the low frequency phase rotation circuit 61. As described above, according to
the stereo reproduction apparatus of the present invention, the L-CM power amplifier and the RCH power amplifier are provided with the phase rotation circuit of the frequency characteristic at
at least one of the input units. -Power is supplied to the speaker as a load connected between the
unbalanced outputs of the two power amplifiers of the CHk power amplifier, thereby eliminating
the need for a center channel amplifier, simplifying the circuit and reducing the cost In addition,
it is possible to regenerate the low-pass component of the L-OH signal and the R-OH signal.
4. Brief Description of the Drawings FIG. 1 is a circuit diagram of a conventional stereo
reproduction apparatus, FIG. 2 is a circuit diagram showing one embodiment of the stereo
reproduction apparatus according to the present invention, and FIGS. FIG. 16 is a circuit diagram
showing another embodiment of the stereo reproduction apparatus of FIG. L: left channel
amplifier, R: right channel amplifier, 1: L-CM signal source, 2, 12: signal source resistance, 3: LCH power amplifier, 4, 5, 14.15 иии Feedback resistance, 21, 33.41 иии Capacitor, 22 ░ 31.33.42-2
yl, 23-L-CH speaker, 34 иии center channel speaker, 43 иии R -CH speaker, 51.52 ... low pass phase
rotation circuit, 61 ... high pass phase rotation circuit. In the drawings, the same reference
numerals indicate the same or corresponding parts. Agent Shinno-Fig. 1 End Page: 4 Fig. 3 ? rA
? Month End Page: ?
10-05-2019
4
10-05-2019
5
Документ
Категория
Без категории
Просмотров
0
Размер файла
14 Кб
Теги
jps57175000
1/--страниц
Пожаловаться на содержимое документа