Merged differential amplifier and current source

Details Merged differential amplifier and current source Merged differential amplifier and current source

1990-11-08

1992-05-19

LaRoche, Eugene R.

Amplifiers

With semiconductor amplifying device

Including differential amplifier

330260, H03F 314, H03F 345

Patent

active

051152061

ABSTRACT:
The tail current of a differential transistor pair (12 and 14) is controlled by a feed-back means (40) that couples the pair's tail node (16) to the control input of each transistor for controlling a biasing current through each transistor. The control input of each transistor further receives an input signal in addition to an output signal of the feed-back means. As a result, the circuit has a stable and accurate tail current, and in addition is suitable for a low-voltage supply or for high-current operation.

REFERENCES:
patent: 4287477 (1981-09-01), Carlsen et al.
patent: 4442408 (1984-04-01), Le
patent: 4539491 (1985-09-01), Nishioka et al.
patent: 4560921 (1985-12-01), Yamatake
patent: 4667166 (1987-05-01), Itoh
patent: 4774476 (1988-09-01), Ecklund et al.

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