Differential driver circuit

Details Differential driver circuit Differential driver circuit

2008-05-27

2008-05-27

Nguyen, Khanh Van (Department: 2817)

Amplifiers

Sum and difference amplifiers

C330S260000

Reexamination Certificate

active

07378905

ABSTRACT:
A current-saving differential wideband driver circuit comprises a differential input amplifier for amplifying a differential input signal to produce a differential intermediate signal being comprised of a first intermediate signal and a second intermediate signal, a first transimpedance amplifier comprising a first inverting input, a first non-inverting input, and a first output, and a second transimpedance amplifier comprising a second inverting input, a second non-inverting input, and a second output. The first intermediate signal is applied to the first non-inverting input, the first output is connected to the first inverting input of the first transimpedance amplifier via a first feedback resistor for negative current feedback, the second intermediate signal is applied to the second non-inverting input, and the second output is connected to the second inverting input of the second transimpedance amplifier via a second feedback resistor for negative current feedback. The differential wideband driver circuit further comprises a third feedback resistor connected between the first and second inverting inputs for setting a gain factor for the wideband driver circuit and an amplified differential output signal is present at the first and second outputs.

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Pierdomenico et al., “A 744mW Adaptive Supply Full-Rate ADSL CO Driver,”Digest of Technical Papers, ISSCC 2002 IEEE International, vol. 1, No. 3-7, pp. 254-256 et al., Feb. 2002.

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