Amplifiers – With semiconductor amplifying device – Including differential amplifier
Reexamination Certificate
2005-05-24
2005-05-24
Nguyen, Patricia (Department: 2817)
Amplifiers
With semiconductor amplifying device
Including differential amplifier
C330S257000
Reexamination Certificate
active
06897726
ABSTRACT:
A differential circuit comprises first and second differential pairs driven by constant-current sources, respectively, for receiving input voltages, first transistors, second transistors, and switches are included. In a first connection state, one current mirror comprises among the first transistors. Input and output terminals of the one current mirror are connected to outputs of the first differential pair. Two current mirrors are composed by the second transistors. Inputs of the two current mirrors are connected to the outputs of the second differential pair, and the outputs of the two current mirrors are connected to an input and an output of the one current mirror circuit. The output of the one current mirror is a first output. In a second connection state, one current mirror comprises among the second transistors. The input and the output of the one current mirror are connected to the outputs of the second differential pair. Two current mirrors are composed by the first transistors. The inputs of the two current mirrors are connected to the outputs of the first differential pair, and the outputs of the two current mirror circuits are connected to the input and the output of the one current mirror circuit, respectively. The output terminal of the one current mirror is a second output terminal.
REFERENCES:
patent: 4555673 (1985-11-01), Huijsing et al.
patent: 5179354 (1993-01-01), Okamoto
patent: 5714906 (1998-02-01), Motamed et al.
patent: 5729177 (1998-03-01), Goutti
patent: 6100762 (2000-08-01), Kato
patent: 6480178 (2002-11-01), Itakura et al.
patent: 6567327 (2003-05-01), Tsuchi
patent: 5-63464 (1993-03-01), None
patent: 7-31351 (1995-02-01), None
patent: 9-93055 (1997-04-01), None
patent: 2000-252768 (2000-09-01), None
patent: 2002-258821 (2002-09-01), None
NEC Corporation
Nguyen Patricia
Sughrue & Mion, PLLC
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