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US 2003/0117213 A1Published application
Limiting amplifier
AssigneeInternational Business Machines Corporation
InventorMyriam Massei
Life of this patent
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Abstract
A limiting amplifier comprises a differential amplifying stage combined with a differential output stage. The limiting amplifier is characterized in that a first and a second resistor means are coupled to the differential amplifying stage and to the differential output stage. The proposed arrangement leads to a constant gain ratio thereby providing a gain circuit that is independent over the process and the temperature variations.
Claims10
A limiting amplifier comprising:
- (1) a differential amplifying stage comprising first and second input transistors having:
- (a) first and second input terminals coupled to a differential input voltage,
- (b) first and second high terminals respectively coupled to a high power supply through first and second load means, and
- (c) first and second low terminals respectively coupled to a low power supply through first and second current source means;
- and
- (2) a differential output stage comprising a third and fourth input transistors having:
- (a) third and fourth input terminals respectively connected to the first and second high terminals,
- (b) differential output terminals respectively connected to third and fourth current source means, and
- (c) high terminals connected to the high power supply;
- wherein said differential amplifying stage further comprises a first resistor means connected between said first and second low terminals;
- and said differential output stage further comprises a second resistor means connected between said differential output terminals.
8 more elements
Dependencies are inferred from the claim text.