IF Signal Processing Circuit

(A

2C PLL VIF + SIF) for TVs and VCRs

Overview

The LA7583 is a VIF + SIF IC that requires no adjustments. In

order to eliminate the need for adjustments in the VIF block, a

multi-network PLL has been developed and adopted for video

detection. In the SIF block, adjustments were eliminated by

using gyrator technology in the FM quadrature detector. In

addition to eliminating the need for adjustments, a buzz

canceller that suppresses Nyquist buzz has been built into the

LA7583 in order to provide excellent sound quality.

Features

.

Elimination of VCO, AFT, and SIF coils eliminates the need

for adjustments.

.

A variety of built-in filters.

.

Built-in buzz canceller results in excellent audio

characteristics.

Note: A

Automatic Adjustment Control

AQT

Automatic Quadrature Tuning

Package Dimensions

unit : mm

3067-DIP24S

[LA7583]

SANYO : DIP24S

Functions

[VIF]

.

VIF amplifier

.

Multinetwork PLL

.

BNC

.

FAGC

.

Equalizer amplifier

.

AFT

.

IFAGC

.

Buzz canceller

.

AGC lag lead filter

.

Video driver

[1st SIF]

.

Preamplifier

.

1st SIF detector

.

AGC detector

.

Built-in AGC filter

[SIF]

.

Limiter amplifier

.

AQT detector (gyrator)

.

J/U switch

[mute]

.

Audio mute

.

AV mute

Ordering number: EN5177

Monolithic Linear IC

LA7583

SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters

TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN

83095HA(II) No.5177-1/15