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ZXFV4089

Zetex Semiconductors
Part Number ZXFV4089
Manufacturer Zetex Semiconductors
Description VIDEO AMPLIFIER
Published Apr 17, 2005
Detailed Description ZXFV4089 VIDEO AMPLIFIER WITH DC RESTORATION DEVICE DESCRIPTION The ZXFV4089 is a DC restoring circuit and low-distorti...
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ZXFV4089
ZXFV4089

Overview
ZXFV4089 VIDEO AMPLIFIER WITH DC RESTORATION DEVICE DESCRIPTION The ZXFV4089 is a DC restoring circuit and low-distortion video amplifier.
It is specially designed to provide brightness level stability as a ‘black-level clamp’ in video systems with very low distortion and low power consumption.
A high fidelity video amplifier is combined with a sample-hold switch circuit using an external coupling capacitor to provide level-shifting of the video output such that a time-gated sample of the waveform is set to be equal to an external reference voltage (usually zero voltage).
A buffered TTL/CMOS logic input signal controls the switch.
The gain is set externally by two resistors.
In a typical ap...


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