Integrated circuits and methods for enabling high-speed...

Details Integrated circuits and methods for enabling high-speed... Integrated circuits and methods for enabling high-speed...

2009-05-16

2011-10-11

Nguyen, Long (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Amplitude control

C327S067000, C327S332000

Reexamination Certificate

active

08035438

ABSTRACT:
An alternating-current (AC) coupling integrated circuit (IC) suppresses signal errors introduced by a steady-state input signal. The IC includes an operational amplifier, a true direct-current (DC) bias network, a complimentary DC-bias network and first and second feedback elements. The operational amplifier has an inverting input, a non-inverting input and an output. The true DC-bias network has first and second branches that are coupled to one another and the non-inverting input. The complimentary DC-bias network has third and fourth branches that are coupled to one another and the inverting input. First and second feedback elements generate first and second control signals in response to a characteristic of one of the true input signal and the complimentary input signal. The control signals prevent the voltage at the inputs to the operational amplifier from reaching an equivalent, steady-state, DC-bias voltage.

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Secareanu, R.M. et al., “A Differential High-Speed Digital CMOS Buffer With Hysteresis for Improved Noise Immunity,” ASIC/SOC Conference, 2000. Proceedings 13th Annual IEEE International, 2000, pp. 326-329.

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