EL4451 Просмотр технического описания (PDF) - Intersil

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EL4451

Wideband Variable-Gain Amplifier, Gain of 2

Intersil 

EL4451

The input RC cancels a zero produced by the output op-amp

feedback connection at = 1/RC. With the input RC connected

VOUT/VIN = 1/sRC; without it VOUT/VIN = (1 + sRC)/sRC.

This variable integrator may be used in networks such as the

Bi-quad. In some applications the input RC may be omitted.

If a negative gain is required, the VIN+ and VIN- terminals

can be exchanged.

A voltage-controlled equalizer and cable driver can be

constructed so:

EQUALIZATION AND LINE DRIVER AMPLIFIER

The main signal path is via the REF pin. This ensures

maximum signal linearity, while the multiplier input is used to

allow a variable amount of frequency-shaped input from R1,

R2, and C. For optimum linearity, the multiplier input is

attenuated 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 provide sufficient peaking,

depending on cable high-frequency losses, at maximum

gain. RF and RG are chosen to provide the desired circuit

gain, including backmatch resistor loss.

All Intersil U.S. products are manufactured, assembled and tested utilizing ISO9000 quality systems.

Intersil Corporation’s quality certifications can be viewed at www.intersil.com/design/quality

Intersil products are sold by description only. Intersil Corporation reserves the right to make changes in circuit design, software and/or specifications at any time without

notice. Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and

reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result

from its use. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries.

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