High efficiency cross-coupled folded cascode circuit

Details High efficiency cross-coupled folded cascode circuit High efficiency cross-coupled folded cascode circuit

1990-10-15

1992-02-25

Mottola, Steven

Amplifiers

With semiconductor amplifying device

Including differential amplifier

330257, H03F 345

Patent

active

050917013

ABSTRACT:
A differential input circuit has an input stage with a pair of differentially biased input transistors connected to supply current through respective load impedances, and a gain stage with a second pair of transistors connected to supply additional currents to the load impedances to keep the impedance currents constant over variations in the input voltage levels. A cross-coupled cascode circuit connected between the gain stage transistors and the load impedances compensates for inaccuracies in the load impedance currents which occur during dynamic operation of the circuit, and thus enhances gain, linearity and the current transfer efficiency between the two stages.

REFERENCES:
patent: 4959622 (1990-09-01), Kearney

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