Transconductance compensating bias circuit and amplifier

Details Transconductance compensating bias circuit and amplifier Transconductance compensating bias circuit and amplifier

2008-07-31

2009-12-15

Nguyen, Khanh V (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including particular biasing arrangement

C330S285000, C330S288000

Reexamination Certificate

active

07633346

ABSTRACT:
A transconductance compensating bias circuit is disclosed that includes a first field-effect transistor (FET) having a first electrode, a second electrode, and a gate connected to the first electrode, wherein a reference current flows through the first and second electrodes; a second FET having a first electrode, a second electrode, and a gate connected to the gate of the first FET, wherein a bias current flows through the first and second electrodes; a resistor connected to the second electrode of the first or second FET; and a comparison part configured to output a signal corresponding to the result of comparison of the first potential of the first electrode of the first FET and the second potential of the first electrode of the second FET. The reference current and the bias current are controlled by the output signal of the comparison part so as to equalize the first and second potentials.

REFERENCES:
patent: 7119620 (2006-10-01), Pan
patent: 7268528 (2007-09-01), Noda
patent: 7304539 (2007-12-01), Tsurumaki et al.
patent: 9307369 (1997-11-01), None
patent: 2006109349 (2006-04-01), None
patent: 2007148530 (2007-06-01), None
Behzad Razavi. “Design of Analog CMOS Integrated Circuits” McGraw-Hill Higher Education, International Edition 2001.

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