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Silicore
CD7343CS
SHAOXING SILICORE TECHNOLOGY CO.,LTD
www. Silicore. com. cn
CHMC
3/5
TEST CI RCUI T
10uF
SW1
V1
SG
330K
2.2uF
Vcc=8V
~
V2
Hz
~
4.7uF
4.7uF
SW3
SW3
SW2
BPF
3.3K
V3
Hz
~
IN
CD7343CS
9
1
2
3
4
5
6
7
8
C1
C2
C4
R2
BPF:
19kHz ≤ 55dB
38 kHz ≤ 5 5dB L.P. F
APPLICATION INFORMATION (refer to test circuit)
External Components
1. Input cou p l i ng capa c it or (C1)
The rec o m m e nded v a lue is 10
µF. If smaller values than 10µF are used, low
frequency s e parati on will worsens , and if l a rg e values a r e used ,POP noise occ u rs
strongly.
2.
L o w Pass Filter (C2, C1, R1)
This is the low Pass filter for the PLL, which is det e rm ined the capt u re range
and THD at low freque ncy.
3.
VCO n e twork (C4 , R2, R7)
The VCO free runni ng frequency is adjust ed by conne cti ng a freque ncy coun ter
to monitor the 38kHz out put of Pin6 .
4.
Dec o d e r Output (Pin8, 9)
These c o m pone nts provi de R i g h t an d L e ft chan nel Ou tput l o ad c i rcuits . T h e
reco m m e nded circ uits as follows:
4.7uF
1nF
400mH
2.2K
68nF
From
Pin 8,9
Output
4.7uF
From
Pin 8,9
Output
LPF
19kHz<55dB
38kHz<55dB
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