Bias circuit

Details Bias circuit Bias circuit

2006-08-17

2010-06-29

Pascal, Robert (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including differential amplifier

C330S285000

Reexamination Certificate

active

07746168

ABSTRACT:
A bias circuit of a resistance load differential amplifier comprises a first differential pair and a control unit for controlling a tail current of the first differential pair, and making an output current of the first differential pair being in inverse proportion to a load resistance in the resistance load differential amplifier when applying a constant potential difference to an input of the first differential pair. The control unit further controls a tail current of a second differential pair constituting the resistance load differential amplifier, and makes the tail current of the second differential pair being in direct proportion to the tail current of the first differential pair.

REFERENCES:
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patent: 7265625 (2007-09-01), Klemmer
patent: 7471152 (2008-12-01), Jiang et al.
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Behzad Razavi; “Design of Analog CMOS Integrated Circuits”; McGraw Hill Higher Education; A Division of the McGraw-Hill Companies; 2001; pp. 107-108 and pp. 377-379.

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