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TK10931VTL

NARROW BAND FM/AM IF SYSTEM

Toko America Inc  

TK10931V

PIN FUNCTION DESCRIPTION

PIN NO.

SYMBOL

1 OSC(B)

2

OSC(E)

3 MIX OUTPUT

VOLTAGE

2.98 V

2.2 V

1.6 V

INTERNAL EQUIVALENT CIRCUIT

DESCRIPTION

VCC

10 k

3 pF

3.9 k

150 µA

Pins 1 and 2 can be used to

build a colpitts type oscillator.

The emitter-follower operating

current can be increased by

connecting an external resistor

between Pin 2 and GND when

the load is heavy. Inject the

oscillating signal into Pin 1 by

capacitive decoupling with Pin

2 OPEN when an external

oscillator is used instead of the

internal oscillator.

VCC

Mixer Output Terminal.

The output impedance is

approximately 1.8 kΩ.

1.8 k

260 µA

4

VCC

5

AM IF INPUT

3.0 V

1.9 V

VCC

10 k

Power Supply Terminal

AM AGC Amplifier Signal Input

Terminal

6 DECOUPLING

1.2 V

25 µA

VCC

AM AGC Amplifier Decoupling

Terminal

7 FM IF INPUT

8 DECOUPLING

9 DECOUPLING

2.0 V

2.0 V

2.0 V

VCC

1.8 k

80 µA

Pin 7 is the FM IF Limiter

Amplifier Signal Input Terminal.

The input impedance is

approximately 1.8 k9.

Pins 8 and 9 are the FM

Limiter Amplifier Decoupling

Terminals.

January 2001 TOKO, Inc.

Page 13

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