Title: A low-voltage fully differential constant-g(m) rail-to-rail CMOS operational amplifier
Authors: Ferri, G ×
Sansen, Willy
Peluso, V #
Issue Date: Apr-1998
Publisher: Kluwer academic publ
Series Title: Analog integrated circuits and signal processing vol:16 issue:1 pages:5-15
Abstract: A low-voltage fully differential CMOS operational amplifier with constant-g(m) and rail-to-rail input and output stages is presented. It is the fully differential version of a previously realized single-ended operational amplifier where a novel circuit to ensure constant transconductance has been implemented [1]. The input stage is a rail-to-rail structure formed by two symmetrical OTAs in parallel (the input transistors are operating in weak inversion), The class-AB output stages have also a full voltage swing, A rail-to-rail input common mode feedback structure allows the output voltage control. Measurements in a 0.7 mu standard CMOS process with threshold voltages of about 0.7 V have been done, The minimum experimental supply voltage is about 1.1 V. The circuit provides a 60 dB low frequency voltage gain and about 1.5 MHz unity gain frequency for a total power consumption of about 0.72 mW at a 1.5 V supply voltage.
ISSN: 0925-1030
Publication status: published
KU Leuven publication type: IT
Appears in Collections:ESAT - MICAS, Microelectronics and Sensors
× corresponding author
# (joint) last author

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