cxa2647n Sony Electronics, cxa2647n Datasheet - Page 12

• Manufacturer Part Number: cxa2647n
• Description: Rf Signal Processor For Cd Players
• Manufacturer: Sony Electronics

• VC Buffer
This outputs the VC ((1/2) V
The maximum output current is approximately ±3mA.
Use this voltage as the analog block VC voltage.
• RFDC
The signals input to the A, B, C and D pins are added, amplified and the RFDC signal is output. ROM/RW
switching, low frequency gain adjustment and output DC voltage adjustment are possible.
VC
27
25
RFDC = Gain (A + B + C + D)
Low frequency gain ROM: 16.5dB
The gain can be adjusted by the external resistance connected between Pins 28 and 29.
The output voltage offset can be adjusted by controlling the Pin 30 voltage.
VC
ROM
C
D
A
B 7
RW
CC
6
8
9
V
RW:
) voltage.
CC
40k
40k
ROM
24k
15k
15k
15k
15k
2.4k
3.3k
28.5dB
30
VC
10k
RW
Control bias
VC – 1V to VC + 1V
96k
40k
ROM
RW
– 12 –
Cut-off frequency fc (typ.)
• DVC Buffer
This outputs the DVC ((1/2) DV
The maximum output current is approximately ±3mA.
Use this voltage as the digital block VC voltage.
The each output DC voltage of FE, TE and CE is
level shifted using the DVC voltage as the reference.
ROM : 15MHz
RW
DVC
RFDCI 29
2k
124
VC
: 6MHz
14
25
5.1k
28
124
RFDC
DV
CC
) voltage.
CC
40k
40k
CXA2647N