Cross coupled amplifier

Details Cross coupled amplifier Cross coupled amplifier

1981-09-28

1984-10-09

Mullins, James B.

Amplifiers

With semiconductor amplifying device

Including differential amplifier

330112, H03F 345, H03F 138

Patent

active

044764405

ABSTRACT:
An improved differential amplifier includes two Darlington transistor pairs (44-45, 46-47) connected to form a Darlington differential amplifier having complementary sides. Two cross-coupling transistors (50, 52) connect thereto for providing complementary positive feedback of gain less than one between the sides. The cross-coupling transistors significantly improve the differential gain and differential input resistance of the Darlington amplifier.

REFERENCES:
patent: 3848139 (1974-11-01), Holt, Jr.
"Adaptive Biasing CMOS Amplifiers", by Degrauwe et al., Jun., 1982.
"An Open Loop Programmable Amplifier with Extended Frequency Range", by Blauschild, Dec.; 1981.

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