M. Santo Zarnik, F. Novak.
On oscillation-based test structures of active RC filters,
International Journal of Numerical Modelling, Electronic networks, Devices and Fields, Vol. 14, Issue. 3, 2001, pp. 283-288.
The recently proposed oscillation-based test structures of active RC filters assume ideal opamps
and test switches. In this letter, feasibility case study of the oscillation-based test
structure of the resonant bandpass filter is presented in which non-ideal characteristics
of the employed opamps and MOS switches are considered. Based on the dominant pole model
for the opamps, we derive expression for the minimum value of the resistance required
to put the filter stage into oscillation and expression for the frequency of the undamped pole.
Derived expressions describe the conditions for the implementation of the oscillation-based
test in practice.
(reprints available on request)