PIF/SIF + ATT IC FOR TV/VTR
TA8701AN
TOSHIBA BIPOLAR LINEAR INTEGRATED CIRCUIT SILICON MONOLITHIC
TA8701AN
PIF / SIF+ATT IC FOR TV / VTR To input fu...
Description
TA8701AN
TOSHIBA BIPOLAR LINEAR INTEGRATED CIRCUIT SILICON MONOLITHIC
TA8701AN
PIF / SIF+ATT IC FOR TV / VTR To input function
FEATURES
PIF section
· RF-Pre Amp. less by high input sensitivity
· 3-Stage IF amplifier with variable gain
· High-Speed response AGC with dual time constants
· Single end AFT output with defeat function
· Delayed RF AGC output (Reverse AGC)
· Output with white / black noise inverter
· Output without white / black noise inverter
· Video mute switch
SIF section
· 3-stage limiter amplifier · Quadrature-type detection circuit
Weight: 1.22g (Typ.)
· Use of a ceramic discriminator device makes the SIF circuit adjustment-free
· Sound mute switch
· N.F. audio amplifier
· DC ATT control
1 2001-05-10
BLOCK DIAGRAM
TA8701AN
2 2001-05-10
TERMINAL FUNCTION
PIN No.
PIN NAME
FUNCTION
1 2
AGC Filter
This filter is a dual time constant system to speed up AGC. By connecting the primary filter terminal of pin 2 to GND, the picture muting is executed.
TA8701AN
INTERFACE CIRCUIT
3 AGC Delay
This terminal adjusts the delay point of RF AGC by varying the reference voltage of comparator.
4 5
PIF Input
This is an input terminal of PIF signal using an emitter follower. The input impedance is typical 2.5kΩ, 4pF.
6 PIF GND
GND pin for the PIF amplifier. Connect a capacitor between pins 23 and 6.
7 RF AGC Output
Output pin for RF-AGC supplied to the tuner. (A 39kΩ resistor is connected internally between pin 7 and the internal power supply p...
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