TDA9812/V1 Просмотр технического описания (PDF) - Philips Electronics

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TDA9812/V1

Multistandard VIF-PLL and FM-PLL/AM demodulator

Philips Electronics 

Philips Semiconductors

Multistandard VIF-PLL and

FM-PLL/AM demodulator

Preliminary specification

TDA9812

FEATURES

• 5 V positive supply voltage

• Gain controlled wide band VIF-amplifier (AC-coupled)

• True synchronous demodulation with active carrier

regeneration (very linear demodulation, good

intermodulation figures, reduced harmonics, excellent

pulse response)

• Gated phase detector for L/L accent standard

• VCO frequency switchable between L and L accent

(alignment external) picture carrier frequency

• Separate video amplifier for sound trap buffering with

high video bandwidth

• VIF AGC detector for gain control, operating as peak

sync detector for B/G (optional external AGC) and peak

white detector for L; signal controlled reaction time for L

• Tuner AGC with adjustable Take Over Point (TOP)

• AFC detector without extra reference circuit

• AC-coupled limiter amplifier for sound intercarrier signal

• Alignment-free FM-PLL demodulator with high linearity,

switchable de-emphasis for FM

• AM-SIF AGC detector for gain controlled SIF amplifier

• AM demodulator without extra reference circuit

• Stabilizer circuit for ripple rejection and to achieve

constant output signals.

GENERAL DESCRIPTION

The TDA9812/T is an integrated circuit for multistandard

vision IF signal processing and AM and FM sound

demodulation in TV and VTR sets.

ORDERING INFORMATION

TYPE

NUMBER

TDA9812

TDA9812T

NAME

SDIP32

SO28

PACKAGE

DESCRIPTION

plastic shrink dual in-line package; 32 leads (400 mil)

plastic small outline package; 28 leads body width 7.5 mm

VERSION

SOT232-1

SOT136-1

1995 Mar 21

2

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