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JPS5119502

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DESCRIPTION JPS5119502
4, ...): j'l application (b) 1ilr, i self f-J'a or 23 inventors' name 1 material Expo 3, 4. I, i patent
applicant (1 · post office 11 city Keihan Hondori 2 f, +1.8 address [phase] Japan Patent Office ■
JP-A-51-195020 published Japan. (1976)21B。 ■ Japanese Patent Application + qqtgtq Office internal reference number 734623 Ming # I Cao 1, title of the invention 2 channels,
4 channels display circuit A pair identifying the phase difference between the front signal and
the rear signal of each channel left and right? A 2-channel, 4-channel display circuit comprising a
discrimination circuit, a gate circuit for gating the output signal of the pair of left and right
discrimination circuits, and a display circuit connected to the gate circuit.
2, 9 claims
8. Detailed description of the invention Whether the music being played by electronically
identifying the position difference between the front signal and the rear signal of each channel is
4 channels or 2 channels. The present invention relates to a two-channel, four-channel display
circuit that has made it possible to identify and display it. The present invention will now be
described with reference to the drawings. In FIG. 1, (LFXLR) indicates the input terminals of the
front and rear signals of the left channel 7 and 7 to the input terminal (fXIR) increases low-pass
filters (2), (2) and 11 respectively. A ranger (3 × 3) ′ Schmitt circuit (4) (41 ′), a differential
circuit (5 × 5) / and a waveform shaping circuit (6 × 6) ′ are connected. Further, the shaping
and shaping circuit (6 × 6) 'is connected to a discrimination circuit (7) for AND-gating the
signals from both, a 7-rip-flop circuit (8) and a DC conversion circuit (9). The right channel α
also has the same circuit configuration as the left channel (1), the output side of the left channel
(1) and the right channel αO has an AND circuit (b) all valves and a display circuit (a) It is
connected to the. . The specific circuit of each block is shown in FIG. 2 and the signal input to the
left front input terminal (TJ) is as shown in M4 FIG. IJ '0 by the low pass filter (2) (500-IKEIZ
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Converted to a low frequency signal). This signal is converted by the transistor a3 (14) of
amplification method 8) into a transistor of amplification by αQ Schmitt circuit (4) shown in FIG.
4 (1), and further a differential circuit (5) and the waveform shaping circuit (6) reshape the pulse
signal as shown in FIG. 8 and 2). On the other hand, the signal input to the left rear input
terminal (pressure) also obtains a pulse signal as shown in FIG. 8 (following FIG. 8) through the
same process as EndPage: 1. These pulse signals (positive 2) (T1. F'g) is added to the
identification circuit (7) consisting of an AND circuit. However, when the performance of two
channels is being performed, the front input terminal (LF) and the rear input terminal (the input
signal coming in at the same time have the same phase, so it is possible to obtain the input signal
by waveform shaping etc. The waveform shaping circuit (6X6) / pulse signal (yg) (m2) of the
same is simultaneously applied to the identification circuit (7), so the identification circuit (7)
passes these signals and adds it to the flip flop circuit (8) The pump circuit (8) is operated to
obtain a wedge wave shown in FIG. 4 CIA>. These are transistor Q't) and diode Q! 4 is converted
to a DC signal as shown in FIG. 4 (■ deporated DC signal and is added to the base electrode of
the transistor (B) of the AND circuit B). Is added to the base electrode of.
Accordingly, since the transistor (4 of the display switching (6) becomes nonconductive and the
transistor (2) is made conductive, the light emitting diode (good) is made to emit light, and it is
displayed that it is played in two-inch rennel. Next, when a 4-channel performance is being
performed, a phase difference occurs between the input signals coming in at the front input
terminal and the rear input terminal of each channel. The pulse signal (: ig) (W) has a phase
difference as shown by the dotted line (FIG. 4 LR $ 1) 7 and these signals do not simultaneously
enter the discrimination circuit (7). Do not pass company signals. Therefore, no signal is
generated from the DC conversion circuit (9) and no signal is applied to the AND circuit (ii), the
transistor 磐 of the display circuit (2) is made conductive and the transistor (e) is made nonconductive. Only 4) and 4 channels to play t). Display Here to the front input signal of one
channel and to the rear K7 + 174. . The signal obtained by comparing the phase with the onehand signal is further compared with the signal obtained by comparing the phase with the input
signal of the front and rear of the other channel to I- and '′ ′. The purpose of this is to ensure
identification of 2 channels and 4 channels. That is, if it is 入 力 comparing the front input signal
and the rear input signal of one channel, even if the performance of 4 channels is being
performed, the above two signals are in phase and the performance and identification of the 2
channels. There is a possibility that it will become impossible, but the front input signal and the
rear input signal of the left and right side channels are identified respectively and the identified
signals are further gated. Even if the front input signal and the rear input signal of one channel
happen to be in phase, the front input signal and the rear person of the other channel are shown
in FIG. 8 which is a circuit diagram showing another embodiment of the present invention. The
input signal input to the front input terminal (Lll ') is converted into a 500 to 1 signal by I: lw /
(sifter (e)), and these are amplified by the transistor @ (c). In the same manner as above, the input
signal input to the rear input 8 1 terminal (spot) of the left channel is converted by the low-pass
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filter as described above and the in-phase component is canceled together with the signal
amplified by the amplification circuit. Since the signal from the amplification circuit (2) or the
like is alternately applied to the base electrode of (b), this signal is formed by a transistor by
amplification. A DC signal is obtained from the DC conversion circuit of the right channel in the
same manner as described above, and the transistor (or) of the OR circuit (b) is made conductive.
Therefore, since the transistor operation of the display circuit (2) is not conducted and the
transistor function is conducted, the light emitting diode is lighted to indicate that the
performance of four channels is performed. When the performance of 2 channels is performed
and EndPage: 2 is established, the signal supplied to the base electrode of the transistor C + of
the identification circuit (g) is made to be in reverse phase, so that an output signal is generated.
Therefore, the transistor branch of the OR circuit (b) is turned off and the transistor function of
the display circuit (6) is turned on to emit light from the light emitting diode (good) and perform
two channels of performance. Display In the above circuit, the forward signal and the backward
signal of one channel are even in phase with the 4-channel performance 1 and the in-phase
component is canceled by the identification circuit (1) and no signal is added to the transistor
(or) of the OR circuit (b) Even if the forward and backward signals of the other channel are
hardly in phase, the signal is applied to the transistor of the OR circuit) so that the transistor 磐
of the display circuit ■ is nonconductive and the transistor 榊 is conductive. Light emitting
diode) to indicate that the 4-channel performance is being performed. As described above, the 2channel 4-channel display circuit of the present invention identifies the phase difference between
the front signal and the rear signal of each channel to obtain a signal, and operates the gate
circuit with these signals to display the display circuit. As the front and back signals of one
channel become in phase during the performance of 4 channels, it is rare for the front and back
signals of the other channel to be in phase at the same time. Nine. Therefore, there is no chance
that the 2 channel performance is displayed accidentally while the 4 channel performance is
playing.
4. Brief description of the drawings FIG. 1 is a block diagram of a two-channel four-channel
display circuit according to the present invention, FIG. 2 is a circuit diagram embodying the block
diagram of FIG. FIG. 4 is a circuit diagram showing another embodiment of a four-channel display
circuit, and FIG. 4 is a waveform diagram of signals of respective portions in FIG. 1 and FIG. (1) ...
left channel, (2 x 2) ha · low pass filter, (3 x 3) I ... amplifier, (4 x 4) 'sinimit circuit, (5) (5) / ...
differentiating circuit, ( 6) / (6) / waveform shaping circuit for (7) ... identification circuit (8) ...
flip flop circuit (9) ... direct current conversion circuit, α Q ... right channel (2) ... Gate circuit for
gating the output signal from the left and right channels, (6) ... Display circuit. Patent Assignee 9EndPage: 3 JP-A-51-19502 ('4) EndPage: 4
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