A Spur-Reduced Power-Efficient Fully Differential VCO-based Operational Transconductance Amplifier

Verfasst von

Kaxin Tang, Jesko Flemming, Pascal Witte, Bernhard Wicht, Hendrik Siemßen

Abstract

In this paper a spur-reduced fully differential VCO-based operational transconductance amplifier (VCO-OTA) is presented. This work extends a state-of-the-art (SOTA) implementation, where a combination of a phase-frequency detector (PFD) and a charge pump (CP) is utilized. The architecture is enhanced by splitting the CP into three CPs while the total current remains the same. Compared to the SOTA architecture our implementation features significantly reduced ripples, i.e., a spur reduction of 13.9 dB, while shifting harmonics to three times higher frequencies due to the higher interleaved clock of the output stage. With a combination of the three CP blocks into a single unit, these improvements are achieved without spending significantly more power or area as compared to the SOTA VCO-OTA.

Details

Organisationseinheit(en): Fachgebiet Mixed-Signal-Schaltungen
Laboratorium für Nano- und Quantenengineering
Institut für Mikroelektronische Systeme
Externe Organisation(en): Hochschule Hannover (HsH)
Typ: Aufsatz in Konferenzband
Publikationsdatum: 21.09.2025
Publikationsstatus: Veröffentlicht
Peer-reviewed: Ja
ASJC Scopus Sachgebiete: Energieanlagenbau und Kraftwerkstechnik, Elektrotechnik und Elektronik, Instrumentierung
Elektronische Version(en): https://doi.org/10.1109/PRIME66228.2025.11203413 (Zugang: Geschlossen )