High speed amplifier incorporating pre-emphasis

Details High speed amplifier incorporating pre-emphasis High speed amplifier incorporating pre-emphasis

2007-09-18

2007-09-18

Nguyen, Khanh Van (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including signal feedback means

C330S009000

Reexamination Certificate

active

10997591

ABSTRACT:
An amplifier circuit for receiving an input signal and providing an output signal, comprises a main chain of logic stages with a plurality of nodes therebetween, and at least one auxiliary chain nested between one node in the main chain and another node, which is not the next node, to form a series of feed back or feed forward nested equalisation loops; whereby the input signal is fed serially down the main chain and is also fed through the said at least one auxiliary chain and summed to provide the output signal. The invention overcomes gain-bandwidth limits of the drive stages and bandwidth reductions that occur when analogue stages operating in a linear mode are concatenated.

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Lawrence, R. et al.: “The Kalman Filter for the Equalization of a Digital Communcations Channel,” IEEE Transactions on Communication Technology, vol. com-19, No. 6, Dec. 1971, pp. 1137-1141.
You, f. et al.: “Multistage Amplifier Topologies with Nested Gm-C Compensation,” IEEE Journal of Solid-State Circuits, vol. 32, No. 12, Dec. 1997, pp. 2000-2011.

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