Abstract
Transconductance amplifier capacitor oscillators (TACOs) readily produce phase-shifted sinusoids with low distortion over a wide frequency range. Hence, TACOs can be used in applications including telecommunications and lock-in amplifiers. The precise amplitude regulation needed in such applications necessitates an automatic gain controller (AGC) with an envelope detector. TACOs and envelope detectors have frequency-dependent nonidealities which complicate AGC design and incite amplitude modulation outside a limited frequency range. This work presents a VCO with an AGC that uses maxima sampling to compensate for envelope detector nonidealities. The VCO, which is evaluated using a field-programmable analog array, is tunable from 30 Hz to 40 kHz and consumes ≤50 μW.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: IEEE Transactions on Circuits and Systems II: Express Briefs
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
