Amplifiers – With semiconductor amplifying device – Including differential amplifier
Reexamination Certificate
2007-09-04
2007-09-04
Pascal, Robert (Department: 2817)
Amplifiers
With semiconductor amplifying device
Including differential amplifier
Reexamination Certificate
active
10911447
ABSTRACT:
A waveform shaping method comprises: (a) receiving link-distorted signal pulses; (b) passing the link-distorted signal pulses through a series of differential amplifiers each have independently tunable, base gains, peak boost gains, boost frequencies and boost bandwidths; and (c) adjusting one or more of the base gains, peak boost gains, boost frequencies and boost bandwidths of the series of differential amplifiers so as to realize a selective and progressive waveform re-shaping of the link-distorted signal pulses. In one embodiment, each amplifier in the series has first and second transistors with respective first and second drain nodes through which sum-constant currents respectively flow; and first and second, variable drain impedances (Zd1,Zd2) coupled to the first and second drain nodes, where each of the variable drain impedances has a non-negligible inductance (L), a non-negligible capacitance (C) and a non-negligible resistance (R), and where at least two of the R, L and C factors are programmably and independently adjustable so that an input voltage versus output voltage transfer function of the differential amplifier can exhibit a peak gain at a corresponding peak boost frequency which is greater than a base gain of the differential amplifier at 0 Hz.
REFERENCES:
patent: 5389893 (1995-02-01), Itri et al.
patent: 5633765 (1997-05-01), Lin et al.
patent: 6023192 (2000-02-01), Didier
patent: 6545502 (2003-04-01), Dasgupta et al.
patent: 6583667 (2003-06-01), Dasgupta et al.
patent: 6717467 (2004-04-01), Renous et al.
patent: 6771124 (2004-08-01), Ezell
patent: 6825722 (2004-11-01), Segawa
patent: 6985036 (2006-01-01), Bhattacharjee et al.
patent: 7049888 (2006-05-01), Soda
patent: 2004/0189387 (2004-09-01), Okamoto
patent: 2006/0091954 (2006-05-01), Darabi
Bhattacharjee Jishnu
Mukherjee Debanjan
Gimlan Gideon
MacPherson Kwok & Chen & Heid LLP
Pascal Robert
Scintera Networks Inc.
Wong Alan
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