Log-domain filter and Square-root domain filter design

jianchongzhou

最近在看对数域和平方根域滤波器设计的原理，现发两篇关于对数域滤波器设计和平方根域的滤波器设计的文章,供大家参考。
The square root design methodology is based on exploiting the MOSFET large-signal square law characteristic to implement filters which are input-output linear, but operate with internally non-linear signals. The design of subcircuits required for the implementation of square root domain filters is described based on the MOSFET translinear principle, and various performance issues are discussed. Simulation and measured results are also presented to confirm the validity of this approach, which may be attractive for low-voltage operation at frequencies in the MHz range.
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