A High - Swing 2 V CMOS Operational Amplifier with Gain Enhancement using a Replica Amplifier
نویسندگان
چکیده
This open-loop gain enhancement circuit in 1.2pm CMOS does not require cascode or long-channel transistors, thus maximizing output swing and input common-mode range [1,21. Since gain enhancement is achieved not by increasing output resistance, but by matching main and replica amplifiers, high effective open-loop gain is maintained even with resistive loads. This circuit can be used with any transconductance amplifier circuit, A basic 2-stage amplifier circuit demonstrates gain enhancement for low-voltage applications.
منابع مشابه
A high-swing 2-V CMOS operational amplifier with replica-amp gain enhancement
Abstrtict— A general gain-enhancement technique for operational amplifiers using a replica amplifier is described. Unlike conventional techniques such as cascoding, which increases the gain by increasing the output resistance, the replica-amp technique increases the gain by matching the main and the replica amps. Among the advantages of the replica-amp technique are low supply, high swing, and ...
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