Premium
On oscillation‐based test structures of active RC filters
Author(s) -
Zarnik Marina Santo,
Novak Franc
Publication year - 2001
Publication title -
international journal of numerical modelling: electronic networks, devices and fields
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.249
H-Index - 30
eISSN - 1099-1204
pISSN - 0894-3370
DOI - 10.1002/jnm.422
Subject(s) - oscillation (cell signaling) , ideal (ethics) , control theory (sociology) , operational amplifier , filter (signal processing) , band pass filter , rc circuit , computer science , electronic engineering , topology (electrical circuits) , engineering , amplifier , electrical engineering , capacitor , voltage , philosophy , genetics , control (management) , epistemology , cmos , artificial intelligence , biology
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. Copyright © 2001 John Wiley & Sons, Ltd.