System for automatically controlling the gain-bandwidth product

Details System for automatically controlling the gain-bandwidth product System for automatically controlling the gain-bandwidth product

1987-11-10

1989-06-13

Wan, Gene

Amplifiers

With semiconductor amplifying device

Including gain control means

330129, H03G 320

Patent

active

048396109

ABSTRACT:
A system for automatically controlling the gain-bandwidth product of operational amplifiers, wherein a gain-bandwidth product (G*B) of one of the amplifiers placed on the same chip as the amplifiers to be controlled is measured and the resulting signal is used to control through a bias circuit, the gain-bandwidth products of all the amplifiers, the value of these products being presettable by the frequeny of a control signal sent to the system input. The reference amplifier is highly compensated in the configuration of voltage follower.

REFERENCES:
patent: 4166981 (1979-09-01), Marchasson et al.

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