Amplifiers – With semiconductor amplifying device – Including differential amplifier
Patent
1998-05-08
2000-09-19
Pascal, Robert
Amplifiers
With semiconductor amplifying device
Including differential amplifier
330258, H03F 345
Patent
active
061218367
ABSTRACT:
A differential amplifier that includes both a main differential pair of transistors and an auxiliary differential pair of transistors of like conductivity type that are operated in a complementary mode with respect to the main differential pair. A monitoring circuit measures the current to the load from the main pair and varies the current to the load from the auxiliary pair to keep the total current to the load substantially constant, as the common-mode amplitude of the input differential signal varies. This serves to increase the effective dynamic range of the differential amplifier.
REFERENCES:
patent: 5515003 (1996-05-01), Kimura
patent: 5608352 (1997-03-01), Itakura
patent: 5650753 (1997-07-01), Ling
patent: 5739722 (1998-04-01), Ling
patent: 5854574 (1998-12-01), Singer et al.
Lucent Technologies
Nguyen Khanh Van
Pascal Robert
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