Norton amplifier
A Norton amplifier or current differencing amplifier (CDA) is an electronic amplifier with two low impedance current inputs and one low impedance voltage output where the output voltage is proportional to the difference between the two input currents.[1] A commercial example of this circuit is the LM3900 quad operational amplifier.[2]
The Norton amplifier can be regarded as the dual of the operational transconductance amplifier (OTA) which takes a differential voltage input and provides a high impedance current output. The OTA has a gain measured in units of transconductance (siemens) whereas the Norton amplifier has a gain measured in units of transimpedance (ohms).[3]
See also[]
- Current differencing transconductance amplifier, current difference input and differential current output
- Current-feedback operational amplifier, single-ended current input and voltage output.
References[]
Bibliography[]
- Carr, Joseph, Linear Integrated Circuits, Newnes, 1996 ISBN 0750625910.
- Bali, S.P., Linear Integrated Circuits, Tata McGraw-Hill Education, 2008 ISBN 0070648077.
- Terrell, David, Op Amps: Design, Application, and Troubleshooting, Newnes, 1996 ISBN 0750697024.
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