an8934fa Panasonic Corporation of North America, an8934fa Datasheet - Page 10

• Manufacturer Part Number: an8934fa
• Description: Video Signal Processing And Qpsk Demodulation Ic For Bs/cs Broadcasting
• Manufacturer: Panasonic Corporation of North America

AN8934FA
10
Pin No.
Terminal Equivalent Circuits (continued)
22
23
24
25
26
27
31
28
30
Pin 28, Pin 30
43.2 k
200
23
Equivalent circuit
15 k
3.2 V
100
1 k
Pin 27, Pin 31
500
100
50
25
50
22
26
Impedance ( )
( 20 )
( 20 )
( 20 )
43.2 k
15 k
130
400
30
Taking out a noise level of 8.9 MHz and
Input pin of eye pattern
Output pin of video amp.
• Capacitance coupling with pin 23.
• Output level (luminance signal level)
Input pin to second stage clamp circuit
• Input level (luminance signal level)
Should be same potential as pin 36
(QPSK supply voltage).
Output pin of video signal
• Output level (luminance signal level)
proximity as C/N det. voltage.
Output pin of eye pattern
• Make a.c. coupling between pin 27 and
• Output level
• Input to comparator and carrier phase
• Input level
min. 1.6 , typ. 2, max. 2.35 V[p-p]
min. 0, typ. 2, max. 2.35 V[p-p]
min. 1.65, typ. 2, max. 2.35 V[p-p]
pin 28, and pin 31 and pin30
min. 0.5, typ. 0.65, max. 0.8 V[p-p]
comparator.
min. 0.5, typ. 0.65, max. 0.8 V[p-p]
Description
ICs for TV
DC voltage (V)
0.6
1.3
1.3
2.7
3.2
5