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A simple technique to evaluate the noise spectral density in operational amplifier based circuits using the adjoint network theoryPublished in
2004
Volume: 51
Issue: 11
Pages: 2175 - 2178
In this paper, we use the adjoint network theory to get quick estimates of the noise contributed by various elements in linear time-invariant opamp based circuits. The noisy operational amplifier is represented using a nullor with an input referred noise voltage and current source. The adjoint model for this representation is derived. This makes the noise analysis of operational amplifier based circuits very simple and the contribution of the operational amplifiers to the output noise can be obtained very often by inspection. The method is applicable to amplifiers, active RC and MOSFET-C filters. Examples of circuits analyzed include the universal active filter and gyrator topologies. © 2004 IEEE.
Topics: Effective input noise temperature (66)%66% related to the paper, Direct-coupled amplifier (65)%65% related to the paper, Operational amplifier applications (63)%63% related to the paper, Current-feedback operational amplifier (63)%63% related to the paper and Operational transconductance amplifier (63)%63% related to the paper
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About the journal
| Journal | IEEE Transactions on Circuits and Systems I: Regular Papers |
|---|---|
| ISSN | 10577122 |
| Open Access | No |
Authors (1)
Vinita Vasudevan- A hierarchical technique for statistical path selection and criticality computation
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Concepts (9)
Active filters- Circuit theory
- GYRATORS
- Mathematical models
- Spurious signal noise
- ADJOINT NETWORK THEORY
- NOISE ANALYSIS
- OUTPUT NOISE
- Operational amplifiers
