Amplifiers – With semiconductor amplifying device – Including differential amplifier
Patent
1997-08-21
1998-12-01
Sikes, William L.
Amplifiers
With semiconductor amplifying device
Including differential amplifier
330261, H03F 345
Patent
active
058444424
ABSTRACT:
A fully differential operational amplifier with improved common mode circuitry for low supply voltage applications is disclosed. The amplifier includes inventing and non-inventing inputs and dual-ended invented and non-invented outputs. The amplifier also includes source transistors for pulling the output to obtain particular output voltage swing. Connections between the inputs and outputs include DC biasing circuitry. The amplifier includes a transistor of select size and characteristics to compensate for voltage drop due to other transistors of the amplifier. Common mode circuitry of the amplifier provides a high level of common mode reconstruction.
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Advanced Micro Devices , Inc.
Nguyen Tiep H.
Sikes William L.
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