TA1372FNG Datasheet, PDF (12/15 Pages) Toshiba Semiconductor – VHF Band RF Modulator IC for VCRs and Set top boxes

Test and Application Circuit
5V
RF
signal
output
Antnna SW ^{0.47 µF}
driver
output
TA1372FNG
P/S ratio
set up
16
Voltage
Regulator
15
Mixer
Video Mod.
White
Clip
Clamp
1
2
1000 pF
14
13
A.VCC
RF
Mod.
0.1 µF
12
11
D.V_CC
Sound
VCO
10
9
D.GND
Charge
Pump
Sound
Counter
Phase
Comp.
RF Carrier
OSC
Charge
Pump
1/4
Programmable
Divider
Phase 62.5 kHz
Comp.
20.8 kHz
Reference
Divider
X’tal
OSC
A.GND
3
4
5
6
7
8
Reference signal
mode selection
High,Open : Ext. 4MHz
Mid. : Ext. 3.58MHz
Low : Int. osc
Video
signal
input
Pre
Emph.
(External
Sound
signal
Reference
Carrier off ^{signal input)}
input mode selection
High : Carrier on
Low,Open : Carrier off
Channel
selection
High,Open : 3CH
Low : 4CH
Components in the test circuits are only used to obtain and confirm the device characteristics. These components
and circuits do not warrant to prevent the application equipment from malfunction or failure.
The application circuits shown in this document are provided for reference purposes only. Especially, a thorough
evaluation is required on the phase of mass production design. Toshiba dose not grant the use of any industrial
property rights with these examples of application circuits.
12
2003-12-25