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BA7230LS - NTSC color TV signal encoder

Datasheet Summary

Features

  • 1) Allows superimposition of video images (VIDEO IN) and computer images (RGB IN). 2) During superimposition, the subcarrier locked onto the video input burst signal RGB is modulated with the RGB signals by the APC circuit, preventing unnatural color disturbance due to switching. 3) Both the RGB and video input signals are pedestalclamped, maintaining a natural image even during fluctuation in luminosity. 4) Using a half down pulse, the video signal can be reduced by 5dB to darken the.

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Datasheet Details

Part number BA7230LS
Manufacturer ROHM
File Size 138.85 KB
Description NTSC color TV signal encoder
Datasheet download datasheet BA7230LS Datasheet
Additional preview pages of the BA7230LS datasheet.

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Full PDF Text Transcription

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Multimedia ICs NTSC color TV signal encoder BA7230LS The BA7230LS comprises an RGB signal matrix circuit, balanced modulator circuit (rectangular 2-phase modulation), oscillator circuit (VCXO) for a 3.58MHz subcarrier synchronized with video input burst signals, luminosity and color difference signal mixing circuit, and a high speed switch for selecting composite signals of video input and RGB input. RGB signals, synch signals, BFP (burst flag pulses), PCP (pedestal clamp pulses) are input, and an NTSC composite signal is output. Applications • Televisions (Teletext-capable), captain systems, video cameras, personal computers Features • 1) Allows superimposition of video images (VIDEO IN) and computer images (RGB IN).
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