On oscillation-based test structures of active RC filters

✍ Scribed by Marina Santo Zarnik; Franc Novak

• Publisher: John Wiley and Sons
• Year: 2001
• Tongue: English
• Weight: 85 KB
• Volume: 14
• Category: Article
• ISSN: 0894-3370
• DOI: 10.1002/jnm.422

✦ Synopsis

Abstract

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.