A -80 dB HD3 opamp in 3.3 V CMOS technology using tail current compensation

A -80 dB HD3 opamp in 3.3 V CMOS technology using tail current compensation

The proposed unity gain configuration operational amplifier (opamp) uses a new tail current compensation method to linearize the input differential pair. The circuit, fabricated in a 0.35 /spl mu/m CMOS process, has HD3 less than -80 dB up to 10 MHz, and less than -60 dB up to 80 MHz input frequency...

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Bibliographische Detailangaben
Hauptverfasser: Hernes, B., Moldsvor, O., Saether, T.
Format: Tagungsbericht
Sprache:eng
Schlagworte:
CMOS technology
Distortion measurement
Feedback circuits
Frequency
MOSFETs
Output feedback
Tail
Transconductance
Very large scale integration
Voltage
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Beschreibung
Zusammenfassung:The proposed unity gain configuration operational amplifier (opamp) uses a new tail current compensation method to linearize the input differential pair. The circuit, fabricated in a 0.35 /spl mu/m CMOS process, has HD3 less than -80 dB up to 10 MHz, and less than -60 dB up to 80 MHz input frequency. The supply voltage is 3.3 V and signal amplitude is 1 V p-p. The opamp is well suited as a track and hold buffer.
DOI:10.1109/ISCAS.2001.921829