EL4094CS 데이터 시트보기 (PDF) - Elantec -> Intersil

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EL4094CS

Video Gain Control/Fader

Elantec -> Intersil 

EL4094C

Video Gain Control Fader

Applications Information Contd

The differential gain error is kept to 0 3% and

the differential phase to 0 15 or better over the

entire input range

The EL4094 as an Adjustable Filter

Equalizers are used to adjust the delay or fre-

quency response of systems A typical use is to

compensate for the high-frequency loss of a cable

system ahead of the cable so as to create a flat

response at the far end A generalized scheme

with the EL4094 is shown below

For an adjustable preemphasis filter for instance

filter A might be an all-pass filter to compensate

for the delay of filter B a peaking filter Fading

the gain from A to B provides a variable amount

of peaking but constant delay

The EL4094 as a Phase Modulator

To make a phase modulator filter A might be a

leading-phase network and filter B a lagging net-

work The wide bandwidth of the gain-control in-

put allows wideband phase modulation of the

carrier applied to the main input Of course the

carrier and gain inputs must not be digital but be

reasonably clean sinewaves for the modulation to

be accurate

a6 dB to b6 dB Linearized Level Control

4094 – 13

General Adjustable Equalizer

10

4094 – 15

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