Amplifiers – With semiconductor amplifying device – Including differential amplifier
Patent
1998-10-09
2000-02-08
Pascal, Robert
Amplifiers
With semiconductor amplifying device
Including differential amplifier
330311, H03F 345, H03F 304
Patent
active
060231920
ABSTRACT:
A dual gain amplifier provides separate gains so that the amplifier's input characteristics are unaffected by the gain selected. The dual gain amplifier comprises a first input amplifier and a third amplifier connected in cascade, and a second input amplifier and a fourth amplifier connected in cascade. A first LC circuit is connected in parallel to a second LC circuit which are both connected to the third amplifier. Likewise, a third LC circuit is connected in parallel to a fourth LC circuit which are connected to the fourth amplifier. The first and third LC circuits have a first quality factor and the second and fourth LC circuits have a second quality factor. The dual gain amplifier switches from a first state in which only the first and third LC circuits conduct to a second state in which all four LC circuits conduct.
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Y. Koutsoyannopoulos et al., "A Generic CAD Model for Arbitrarily Shaped and Multi-Layer Intergrated Inductors on Silicon Subtrates," National Technical University of Athens, Microelectronic Circuit Design Group, and SGS-Thomson Microelectronics, RF Division, pp. 320-323.
Galanthay Theodore E.
Nguyen Patricia T.
Pascal Robert
STMicroelectronics S.A.
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