Amplifier circuit, and system incorporating same

Details Amplifier circuit, and system incorporating same Amplifier circuit, and system incorporating same

2007-09-04

2007-09-04

Mottola, Steven J. (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including atomic particle or radiant energy impinging on a...

C330S100000

Reexamination Certificate

active

11282455

ABSTRACT:
In one embodiment, a current source circuit having a reference resistor produces first, second and third bias currents that vary with manufacturing variances of the current compensation resistor. An input amplification stage includes a transconductance stage biased by the first bias current, a first transimpedance amplifier (TIA) biased by the second bias current, and a first feedback resistor coupled between the first TIA's input and output. The input of the first TIA is coupled to an output of the transconductance stage. An output amplification stage is biased by the third bias current and has an input coupled to an output of the first TIA. A second feedback resistor is coupled between the output of the output amplification stage and the input of the transconductance stage. The reference resistor and first and second feedback resistors are formed using a common manufacturing process.

REFERENCES:
patent: 4458212 (1984-07-01), Brehmer et al.
patent: 6762644 (2004-07-01), Sutardja
patent: 6784749 (2004-08-01), Cove
patent: 6809594 (2004-10-01), Sutardja
patent: 6836182 (2004-12-01), Sutardja
patent: 2004/0056722 (2004-03-01), Sutardja
Wu et al.; “A Novel CMOS Transimpedance Amplifier for DVD Application”; ECCTD'03-European Conference on Circuit Theory and Design; Sep. 1-4, 2003; Cracow, Poland; pp. II-233-II-236.

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