EL4451 datasheet(11/12 Pages) ELANTEC

Part #	EL4451

Description	Wideband Variable-Gain Amplifier, Gain of 2

PDF	12 Pages

Scroll/Zoom	100%

Manufacturer	ELANTEC [Elantec Semiconductor]

Direct Link	http://www.elantec.com

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11 / 12 page

EL4451C

Wideband Variable-Gain Amplifier Gain of 2

Applications Information

Contd

A voltage-controlled equalizer and cable driver

can be constructed so

Equalization and Line Driver Amplifier

4451 – 35

The main signal path is via the REF pin This

ensures maximum signal linearity while the mul-

tiplier input is used to allow a variable amount of

frequency-shaped input from R1 R2 and C For

optimum linearity the multiplier input is attenu-

ated by R1 and R2 This may not be necessary

depending on input signal amplitude and R1

might be set to 0 R1and R2 should be set to pro-

vide sufficient peaking depending on cable high-

frequency losses at maximum gain RF and RG

are chosen to provide the desired circuit gain in-

cluding backmatch resistor loss

EL4451 Datasheet(PDF) 11 Page - Elantec Semiconductor