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JPS5018202

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DESCRIPTION JPS5018202
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a circuit diagram of one embodiment of an
automatic separation adjusting circuit according to the present invention. E и Band E иии Run A9
EPM-FM equalizer, 12 и и и и и и и Expander circuit 13B и и и 16a = 16b и и и и и и и и Control circuit. The
name of the device is corrected as follows.
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an automatic
separation adjusting circuit in convertible discrete 4-channel (abbreviated as FGD-4 hereinafter)
demodulation, in which the light of CdS cell etc. (1) is used instead of the volume resistance of
separencon adjusting. A signal component leaking from the first channel to the second channel
(or the second channel to the fourth channel) is amplified using a circuit composed of a
conductive cell and a resistor, and provided in proximity to the Cds cell according to this signal. +
Photoelectricity of the lamp! The resistance of the Cds cell is changed oJ by iIi * to automatically
adjust the leakage signal so that it becomes a favorite car, thereby providing the whole circuit for
adjusting the separation as m :. Traditionally (! In D-u recovery dA instruments - Pas m you want
to @ integer one John was a signal of special W is said to be in advance Waburuton to Ri di 7 i
leave his own record, after playing the comb, respectively the first It was adjusted to be a
polyium antidegradant for separation so that the signal component from 1 channel channel to 2
channel channel, and from channel No. 2 to channel 2 would be small and small. ???????
Since all the processes were turned on manually, it was 11 'at A'. There was a sub-title point force
that l took and also shook many workers. The present invention aims to reduce the adjustment
process by optimizing the furnace and 1-way operation, and check the factory? (21 speed up is
intended, and one example will be described in detail below. Although only the separation
adjustment circuit between the first channel and the second channel is shown in the figure, the
same applies to the fifth channel and the fourth channel. A signal reproduced from a disk (not
shown) is applied to a low pass P waver) through a n1 equalizer 2 applied to a terminal 1 and a
band off wave 4. This low-pass p-wave a5 is for extracting the direct wave phase signal (OH, +
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CH,) from the multiplex signal of the signal i0H + of the first channel and the signal CH of the
second channel, and its output signal is for separation adjustment The compensation circuit 8 is
applied through the circuit 6 and the equalizer 7. -10,000, band p wave device 4 is an angle
modulation wave difference signal LC) in the above multiplex signal! The output signal of the
low-pass p-wave unit 10, PM-FM is applied after being subjected to Oi adjustment by this n. The
equalizer ll and the expander circuit 12 are closed to rJl! Integration circuit 8 outputs phase
signal tCH, + (!
The signals an, OH of the respective channels are separated from H, and from the difference (Rn
G 14 j (CH + -Cm horse), respectively, and each of the 1st output terminal 4 and the 1st output
terminal 1 4 respectively. The second channel signal CH, OH is taken out. Therefore, in the
present invention, as separation adjustment circuit 6, photoconductive cells 6a and 6 such as Cds
cells connected in series, and correction resistors R + and Rt connected in parallel to each other.
Further, lamps L1) 1 and Lp ? for changing the resistance value of the photoconductive cells
611 and 64 in accordance with the leak signal are disposed in proximity to each other. The
signal line leaked from the first channel to the second channel when amplified to the second
channel after being amplified to the second channel after being added to the above-mentioned
input terminal IK Wavre tone, and then divided into two and divided into n + nM The rectifying
and smoothing circuit 151 &, 15 is added via the capacitor O1 + Cm. One of the AC signals is a
diode D, D. And rectified by the capacitor C2 and then divided appropriately by the resistor RB *
R4. The other AC signal is also rectified by the diode D3 + D4 and is smoothed by the capacitor
O, and then divided appropriately by the resistor R11 + R6. The signal converted into a direct
current by the rectifying and smoothing circuit 15? is a control circuit in which the transistors
Tr1 and Tr2 are Darlington-connected. And the output signal of the rectifying and smoothing
circuit 1'Q is transmitted to the transistors Tr3 and Tr2. It is applied as a control signal to the
control circuit 16.6 connected in a don- ton state. On the other hand, for example, one half cycle
of positive current of the current source 17! The upper part is converted to a direct current by
the diode DI + capacitor C-1: t L 72, supplied to the lamp L p through the control circuit 164,
while the negative half cycle diode T) 6 and capacitor After being reduced to a direct current by
C6, the control circuit No. 16 is valved and supplied to the lamp Lp +. I will explain the operation
of the above automatic separation adjustment circuit configured as above. For example, assume
that the leakage signal to the ? 2 channel is large when the source switch S1 is off. In this state,
the nuits S1 are turned on. The signal leaked to the second channel (5) is applied to the control
circuits 1-6? and 164 via the rectifying and smoothing circuits 15? and 154, respectively.
Since the control circuit 16a is composed of NPN type transistors Tr and lTr, when a large leaked
signal is separated by n at its base, the resistance between the emitter and the collector becomes
a small amount of noise at the lamp L1) m. The lamp Lpt lights more brightly because a large
current IE is l: f] 130. Since the control circuit 164 is constituted by a PNP type transistor Try *
Tr4, the potential applied to its base is When it becomes higher, the resistance between the
emitter and the collector increases, and the turtle L: smaller than the above in the lamp Lpl)-) is
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1: 1F so that it is darker in the Z direction 111 than the lamp pIi-t. Be done.
As a result, the resistance of the photoconductive cell 6a becomes larger and the resistance of the
photoconductive cell 64 becomes smaller, so that the signal V leaking to the two channels is
controlled to be smaller. In this case, when one of the lamps Lp + and Lpm becomes dark, the
other becomes bright and hence the photoconductive cell 6a. The resistance value between the
terminals of the series connection circuit (6) of the photoconductive cells 6a and 64 is kept
approximately constant because 6b is smaller when one of the resistors 11 becomes larger and
the other becomes smaller. Such operation 7 is performed because it is desirable to keep the load
resistance of the low frequency door switch constant at the time of adjustment of separation.
Also, R + -1? , A photoconductive cell 6a. The role of 11 ? positive resistance to 64 each? ???
Thus, when the leakage signal to the second channel is reduced, the signals Tr1 + Tr1 and
Tr31Tr are further controlled by the signal to change the brightness signal of the lamp Lpl-LP ?
in the direction of decreasing the leakage signal component, resulting in the signal ? It is possible
to reach the point which makes the minimum value instantaneously. In the case of C, it is a
matter of fact that it is necessary to select the photoconductive cells 6a, 64 and (the resistor 1 of
resistor R1 + R2) excessively in order to adjust the separation. The above-mentioned automatic
separation control circuit according to the present invention leaks to the second channel (or
fourth channel) together with a photoconductive cell such as an Ode cell instead of the
conventional polyumbing pile with the port 1! 6. Since the brightness k1b14 of the lamp (litL,
which changes the resistance value of the photoconductive cell by the lamp) is used as a signal
component, the separation adjustment of the CD-11 demodulator is performed. It is possible to
automatically carry out the process, to make it possible to stiffen the adjustment man-hour and
to achieve speed-stopping, and also to reduce the cost because the circuit structure 512 is a
grave. Also, it has special features widely applied to the detection of the maximum point and the
minimum point in 2 separation adjustment and other circuits. The figure 4 is a schematic
diagram of one embodiment of the automatic separation control circuit according to the present
invention. l ... input terminal, 5 ... low frequency? m unit, 4 ... band P wave unit, 6 ... conditioning
circuit, Lpl, Lp 2 ... lamp, 6a, 66 ... ? conductive cell, 8 ... dense turn, 9 ... Demodulator, lO: low
pass P wave device, 11: PM-FM equalizer, 12: expander circuit, 13a. 154, ... output shoulders,
15.2, 15.1. ... Rectification smoothing circuit, 16a, 164 ... control # circuit.
Utility model registration applicant Nippon Victor Co., Ltd. Agent patent attorney Ito store that
(8) LP11 length---j---] 2781k> 3 'Lp2-IIIl,? B) Zone 459 o 0 "--out- ?-= a-H (-one -----) C3'3'-3" ,,.
S--------------co 15b ? ? ? ? ? ? D 6 l 5 Tr 3 Tr 4: ?Old 820 2 'i 11 11? IM: + I:', / X
procedure correction Showa 49 August 6, 2012 f's Director General of the Office Nl 5 II & Yuden
('I'! + 1r examiner's office) 1, display of the case 1972 W & for new mu-condyles IQQ 55 2, the
name of the invention 0 I) -4 demodulation-in automatic seven parlaying adjustment a way 3, to
correct Utility model applicants b) 11 и 11 M & 221 ? bland '111 1 1 t j и 1 1 1 411 mountain
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111', '1 1 3 1112 No. 1 river for river I name; Haruna I (t (, put, Matsuno и; ░ Yoshi 4, agent
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