Amplifiers – With semiconductor amplifying device – Including differential amplifier
Reexamination Certificate
2009-02-11
2010-11-16
Choe, Henry K (Department: 2817)
Amplifiers
With semiconductor amplifying device
Including differential amplifier
C330S261000
Reexamination Certificate
active
07834695
ABSTRACT:
An amplifier comprises: first and second supply terminals intended to receive a DC supply voltage; a first branch coupled between the first and second supply terminals and including a first terminal of application of a differential signal to be amplified; a second branch coupled between the first and second supply terminals and including a second terminal of application of the differential signal to be amplified; a third branch coupled between the first and second supply terminals and including a first amplifier having an input terminal connected to the second branch and having an output terminal configured to be coupled to a load, and a measurement element configured to measure a current in the third branch; and a fourth branch coupled between the first and second supply terminals and including a second amplifier having an input terminal connected to the first branch, and a copying element configured to copy the current measured in the third branch.
REFERENCES:
patent: 3894290 (1975-07-01), Schoeff
patent: 5291149 (1994-03-01), Nunoshima
patent: 5483151 (1996-01-01), Yamashita
patent: 6078168 (2000-06-01), Paolo
patent: 2001/0015674 (2001-08-01), Kudo et al.
patent: 0072082 (1983-02-01), None
Choe Henry K
Iannucci Robert
Jorgenson Lisa K.
Seed IP Law Group PLLC
STMicroelectronics SAS
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