Wide dynamic range amplifier with error correction

Details Wide dynamic range amplifier with error correction Wide dynamic range amplifier with error correction

1994-03-14

1995-04-25

Mullins, James B.

Amplifiers

Hum or noise or distortion bucking introduced into signal...

330 59, 330 151, 330308, 359189, H03F 126

Patent

active

054102820

ABSTRACT:
An error corrected wide dynamic range amplifier has a transimpedance amplifier where the input signal node is used as a monitoring point for providing an error correction voltage to a combining circuit that also receives the voltage on the output node of the transimpedance amplifier. The combining circuit subtracts the input signal node voltage from the output signal voltage to produce a resultant voltage substantially free of errors produced by non-ideal characteristics of the transimpedance amplifier. The combining circuit may be implemented using analog or digital circuity. The digital combining circuit may also add digital correction values representative of circuit component errors of the wide dynamic range amplifier. Such a wide dynamic range amplifier is usable in high sensitivity, wide dynamic range optical receivers, such as found in optical time domain reflectometers or other optical measurement instruments.

REFERENCES:
patent: 4792998 (1988-02-01), Toussaint
patent: 5123732 (1992-06-01), Gross et al.
patent: 5311353 (1994-05-01), Crawford

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