Name
Abstract | ||
|---|---|---|
This article shows how an unwanted limit cycle can be exhibited by a second-order CMOS companding filter. The filter employs the quasi-quadratic law of the MOS transistor in strong inversion and saturation to achieve compression together with a class-AB topology to extend the dynamic range. In the zero-input case, the filter operates in the manner expected of an externally-linear circuit. However, when a standard linear IC design technique is applied to it, unwanted zero-input sustained oscillations may be observed. Simulations from PSpice and measurement results from a semi-custom realization in a 0.8 μm CMOS process are used to explore this behavior. This work highlights an aspect of the behavior of such filters that must be taken into account by analog designers. |
Year | DOI | Venue |
|---|---|---|
2008 | 10.1007/s10470-011-9599-4 | Analog Integrated Circuits and Signal Processing |
Keywords | Field | DocType |
Square-root domain filters,Companding filters,Limit cycle,Nonlinear dynamics,Analog integrated circuits | Dynamic range,Active filter,Control theory,Computer science,Prototype filter,CMOS,Limit cycle,Electronic engineering,Companding,Integrated circuit design,Transistor | Conference |
Volume | Issue | ISSN |
68 | SP2 | 0925-1030 |
Citations | PageRank | References |
1 | 0.36 | 9 |
Authors | ||
2 | ||
Name | Order | Citations | PageRank |
|---|---|---|---|
| Carlos Aristoteles De La Cruz Blas | 1 | 1 | 0.70 |
| Orla Feely | 2 | 90 | 25.65 |