Amplifier having improved gain/bandwidth product

Details Amplifier having improved gain/bandwidth product Amplifier having improved gain/bandwidth product

1986-12-22

1988-01-26

Wan, Gene

Amplifiers

With semiconductor amplifying device

Including differential amplifier

330257, H03F 345

Patent

active

047219211

ABSTRACT:
In an operational amplifier having an input stage of the type wherein first and second differentially coupled transistors cooperate with a current mirror circuit, an output transistor is provided having a compensation capacitor coupled between its collector and the input stage. The gain bandwidth product is enhanced by coupling a positive feedback device (e.g. a capacitor) between a collector of the output transistor and the collector of the first input transistor.

REFERENCES:
patent: 4555670 (1985-11-01), Tanaka

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