Amplifiers – With semiconductor amplifying device – Including differential amplifier
Reexamination Certificate
2007-06-26
2007-06-26
Lee, Benny (Department: 2817)
Amplifiers
With semiconductor amplifying device
Including differential amplifier
C330S289000, C330S051000
Reexamination Certificate
active
11032254
ABSTRACT:
An amplifier includes a differential amplifier (10) having an input stage (20) for amplifying a differential input signal (Vin), and an output stage (6) coupled to the input stage (20) for producing and output signal (Vout). The input stage (20) includes main input circuitry (20A) for amplifying small-signal values of the input signal (Vin) and alternative input circuitry (20B) for amplifying the input signal (Vin) during conditions which cause thermal imbalance in the main input circuitry (20B). The input stage (20) includes switching circuitry (12) for coupling the input signal (Vin) to the main input circuitry (20A) during normal small-signal operating conditions and to the alternative input circuitry (20A) during large-signal operating conditions that cause thermal imbalance in the main input circuitry (20B).
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Dashtestani Ahmad
Halbert Joel M.
Brady III Wade J.
Lee Benny
Wong Alan
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