LA7674中文資料三洋數(shù)據(jù)手冊(cè)PDF規(guī)格書

Overview

The LA7674 improves upon the black-level, horizontal jitter, switch-on drift performance of the single-chip LA7672 used to date. Also a single-chip IC, the LA7674 is for color TVs based on the NTSC (National Television System Committee) system with an on-chip circuit for all VIF, SIF, video, chroma and deflection signal processing.

Functions and Features

[VIF]

? PLL detection (high video and audio quality)

? High-gain VIF amplifier

? High speed AGC

? On-chip APC time constant switch

[SIF]

? Simultaneous sound IN/OUT

? Video/audio simultaneous muting, or audio-only muting

possible

[Audio-visual switch]

? Internal/external audio-visual switch (VCC = 9V)

[OSD]

? RGB 3 input

? RGB linear amplifier (– 6dB input: 2V to 5V)

? Fast blanking (B input combined use)

[Chroma]

? On-chip ACC filter, On-chip killer filter, Killer-circuit

hysteresis operation

? On-chip carrier filter

[Video]

? Black enhancement

? DC playback

? On-chip delay line

? Wide band width (9MHz): delay line short

? Dual rank on-chip differentiation circuit also available

for soft also

? S input supported (VCR application)

? Variable DC transmission volume available (externally

attached circuit adjustment)

[Deflection]

? Adjustment-free horizontal, vertical synchronization

? Dual AFC system with excellent anti-noise

characteristics

? External adjustment of vertical synchronization

sensitivity

? Vertical size is constant with no-signal

? Highly stable image during playback of copy protected

tapes (macro-vision tape etc.)

? High stability against VCR skew distortion