CA3126
0.01µF
0.01µF
+12V
0.01µF
0.01µF
1µF
5pF-25pF
2kΩ
680Ω
INPUT FILTER
82pF
68pF
TYP. 0.5V
P-P
56
pF
6
XTAL
33pF
10pF
7
FSC
3.579545MHz
SUBCARRIER
OUTPUT (CW)
VCO
SUBCARRIER
AMP
8
0.01µF
12
4
3
2
L1
12µH
L2
27µH
500Ω
2.4kΩ
V
CC
AFPC
DET/FILT.
CA3126
COMPOSITE
VIDEO/CHROMA INPUT
0.01µF
1
FIRST
CHROMA
AMP
CHROMA/
BURST-GATE
SWITCH
2ND
CHROMA
AMP
15
ACC
AMP
11.2V
ZENER
REF
ACC
DET/FILT.
CHROMA
O.L. DET
KILLER AND
GAIN CONT.
BURST
KEYER
AMP
14
5
10
1µF
11
13
16
9
2kΩ
>1V
PEAK
0V
0.01µF
0.01µF
NOTE: For Subcarrier Regenerator, the second chroma
amp is not used; Pins 13,14, and 15 are not connected and
pin 16 is grounded.
BURST KEY PULSE
4µs (TYP), CENTERED
ON BURST
FIGURE 6. TYPICAL APPLICATION OF THE CA3126 AS A SUBCARRIER REGENERATOR
8-41
HARRIS [ HARRIS CORPORATION ]
