Part Number
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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...
|
Datasheet
|
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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