This paper presents a wide tuning range push-push voltage-controlled oscillator (VCO) at the sub-THz frequency bands. With the introduction of a novel capacitive splitting feedback (CSF) technique and tunable source degeneration (TSD) network, the proposed VCO can simultaneously archive a wide tuning range while maintaining a high output power. The CSF technique improves the oscillation frequency by reducing the effective transistor capacitances, and a wide tuning range is achieved through the TSD network without employing varactors. The proposed VCO is fabricated in a 40-nm digital CMOS process. It shows a -3.5 dBm peak output power with 1.35% DC-to-RF efficiency and a wide tuning range of 10.16% at a center frequency of 267.2 GHz.
|Title of host publication||ESSCIRC 2021 - IEEE 47th European Solid State Circuits Conference, Proceedings|
|Publisher||Institute of Electrical and Electronics Engineers Inc.|
|Number of pages||4|
|Publication status||Published - 2021 Sept 13|
|Event||47th IEEE European Solid State Circuits Conference, ESSCIRC 2021 - Virtual, Online, France|
Duration: 2021 Sept 6 → 2021 Sept 9
|Name||ESSCIRC 2021 - IEEE 47th European Solid State Circuits Conference, Proceedings|
|Conference||47th IEEE European Solid State Circuits Conference, ESSCIRC 2021|
|Period||21/9/6 → 21/9/9|
Bibliographical noteFunding Information:
The authors would like to thank Taiwan Semiconductor Research Institute (TSRI), Taiwan, R.O.C for the chip fabrication. This work is financially supported by the Ministry of Science and Technology (MOST), Taiwan, R.O.C (MOST 109-2221-E-009-140-).
© 2021 IEEE.
- push-push oscillator
- source degeneration
ASJC Scopus subject areas
- Artificial Intelligence
- Hardware and Architecture
- Electrical and Electronic Engineering
- Electronic, Optical and Magnetic Materials