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ET
2007

Oscillation Test Scheme of SC Biquad Filters Based on Internal Reconfiguration

13 years 3 months ago
Oscillation Test Scheme of SC Biquad Filters Based on Internal Reconfiguration
In this paper, we explore general conditions for the oscillation based test of switched-capacitor biquad filter stages. Expressions describing the characteristics of a filter stage put into oscillation are derived and conditions for achieving oscillation by internal transformation of the filter stage are explored. Reconfiguration scheme based on the transformation of the biquad filter stage to a quadratic oscillator is studied. Theoretically the circuit can be put into oscillation by de-activating a single capacitor. Simulations, however, show that in practice a carefully designed low feed-back loop is required to achieve acceptable oscillation test mode. Keywords Mixed-signal test . Oscillation based test . Switched-capacitor filters
Uros Kac, Franc Novak
Added 26 Dec 2010
Updated 26 Dec 2010
Type Journal
Year 2007
Where ET
Authors Uros Kac, Franc Novak
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