Amplifiers – With semiconductor amplifying device – Including differential amplifier
Reexamination Certificate
2007-11-20
2007-11-20
Parker, Kenneth (Department: 2815)
Amplifiers
With semiconductor amplifying device
Including differential amplifier
C330S009000, C330S258000, C330S260000, C330S261000, C330S296000, C330S297000
Reexamination Certificate
active
11136203
ABSTRACT:
An amplifier (10) includes a first stage (4) including differentially coupled first (Q1) and second (Q2) input transistors and a controlled active load circuit (6). A second stage (8) includes differentially coupled third (Q5) and fourth (Q6) input transistors and a load circuit (Q7,8). A first output (2A) of the first stage (4) is coupled to a first input of the second stage (8), a second output (2B) of the first stage (4) being coupled to a second input of the second stage (8). A common mode feedback amplifier (12) has an input coupled to receive a common mode signal (3) from the second stage (8) for producing an amplified common mode signal (9) on a control input of the controlled active load circuit (6) to provide fast settling of an output (Vout) of the second stage without substantially increasing amplifier noise.
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Definition of “Operational amplifier” as presented in The New Penguin Dictionary of Science as presented by “xereferplus” 1998.
“Design of Analog Integrated Circuits And Systems” by Kenneth R. Laker and Willy M. C. Sansen, McGraw-Hill, Inc, 1994, pp. 1-3.
Alenin Sergey V.
Surtihadi Henry
Brady III W. James
Moore J. Dennis
Parker Kenneth
Sayadian Hrayr A.
Telecky , Jr. Frederick J.
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