Miscellaneous active electrical nonlinear devices – circuits – and – Specific identifiable device – circuit – or system – Nonlinear amplifying circuit
Patent
1996-11-15
1998-03-31
Callahan, Timothy P.
Miscellaneous active electrical nonlinear devices, circuits, and
Specific identifiable device, circuit, or system
Nonlinear amplifying circuit
327563, 327103, 327317, 323316, G06G 712
Patent
active
057342938
ABSTRACT:
Current feedback amplifier circuits, and current-to-voltage converter circuits, employing operational amplifier current mirror circuits are provided. Also provided is an output compensation circuit that, in a current feedback amplifier circuit employing the output compensation circuit together with the operational amplifier current mirrors, reduces the input bias current to be comparable to the input bias current of a voltage feedback amplifier. Additionally, a circuit and method of providing a current source that is proportional to absolute temperature is provided. A current feedback amplifier circuit employing the output compensation circuit and the operational amplifier current mirrors, and having input transistors biased by the proportional to absolute temperature current source is also provided. The drift of the input bias current over temperature are thereby made predictable and, with trimming, substantially reduced. The current feedback amplifier circuit and current-to-voltage converter circuit are thus both fast and highly accurate, including over temperature. Additionally, an optical storage accessing circuit which employs the current feedback amplifier circuit of the present invention.
REFERENCES:
patent: 4350904 (1982-09-01), Cordell
patent: 4618816 (1986-10-01), Monticelli
patent: 5334929 (1994-08-01), Schade, Jr.
patent: 5430395 (1995-07-01), Ichimaru
patent: 5493205 (1996-02-01), Gorecki
Sergio Franco, "25. Current-Feedback Amplifiers," Analog Circuit Design: Art, Science, and Personalities, 261-76 (Jim Williams ed., Butterworth-Heinemann 1991).
Analog Devices, Inc., 1992 Amplifier Reference Manual, 2-363 -2-374, 2-383 -2-394 (1992).
Callahan Timothy P.
Drager Elaine A.
Kim Jung Ho
Linear Technology Corporation
Morris Robert W.
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