Amplifiers – With semiconductor amplifying device – Including differential amplifier
Reexamination Certificate
2011-04-12
2011-04-12
Mottola, Steven J (Department: 2817)
Amplifiers
With semiconductor amplifying device
Including differential amplifier
C330S302000, C330S310000
Reexamination Certificate
active
07924092
ABSTRACT:
A two stage amplifier with an inter-stage matching network constituted of a first and a second transistor forming a differential first stage, a third and a fourth transistor forming a differential second stage, an on-chip connection path connecting the emitters of the first and second transistor to the emitters of the third and fourth transistors, a first transformation network and a second transformation network. A collector of the first transistor is operatively connected to a base of the third transistor by the first transformation network and a collector of the second transistor is operatively connected to a base of the fourth transistor by the second transformation network. At least one resistor is provided in the on-chip connection path to stabilize the input of the third and fourth transistors.
REFERENCES:
patent: 4112386 (1978-09-01), Everhart et al.
patent: 5132893 (1992-07-01), Klein et al.
patent: 5172017 (1992-12-01), Schmidt
PCT International Search Report, dated May 2, 2008, from priority application.
PCT International Preliminary Report on Patentability, dated Apr. 22, 2009, from priority application.
Kahn Simon
Microsemi Corporation
Mottola Steven J
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