TA1372FNG Datasheet, PDF (2/15 Pages) Toshiba Semiconductor – VHF Band RF Modulator IC for VCRs and Set top boxes

Block Diagram
TA1372FNG
N.C.
16
Voltage
Regulator
RF
signal
output
15
Mixer
Antnna SW
driver
output
14
Analog
VCC
13
A.VCC
RF
Mod.
Sound PLL
loop
filter
12
Digital
V_CC
11
D.V_CC
Sound
VCO
P/S ratio
set up
10
Digital
GND
9
D.GND
Charge
Pump
Video Mod.
White
Clip
Clamp
1
Reference
signal mode
selection
2
Video
signal
input
Sound
Counter
Phase
Comp.
RFCarrier
OSC
Charge
Pump
1/4
Programmable
Divider
Phase 62.5 kHz
Comp.
20.8 kHz
Reference
Divider
X’tal
OSC
3
RF PLL
loop
filter
A.GND
4
Analog
GND
5
Sound
signal
input
6
Carrier off
mode
selection
7
4 MHz X’tal
or External
Reference
signal input
8
Channel
selection
Some of the functional blocks, circuits, or constants in the block diagram may be omitted or simplified for
explanatory purpose.
2
2003-12-25