A CMOS self-regulating VCO with low supply sensitivity

Author

Hwang, In-Chul ; Kim, Chulwoo ; Kang, Sung-Mo Steve

Author_Institution

Samsung Electron. Co., Gyeonggi-Do, South Korea

Volume

39

Issue

1

fYear

2004

Firstpage

42

Lastpage

48

Abstract

This paper presents a self-regulating voltage-controlled oscillator (VCO) with low supply sensitivity. With an adaptive delay cell, the self-regulating VCO achieves a low supply sensitivity of 0.15%-delay/1%-supply or less. This delay cell has a built-in compensation circuit that senses and corrects the delay variation caused by supply fluctuation. The proposed scheme rejects device noise as well and hence achieves a low phase noise of -101.4 dBc/Hz at 600-kHz offset when it runs at 900 MHz. The prototype phase-locked loop with the VCO fabricated in 0.35-μm CMOS process shows a cycle-to-cycle rms jitter of 2.1 ps at 450 MHz (VCO at 900 MHz) under quiet supply condition.

Keywords

CMOS analogue integrated circuits; UHF integrated circuits; compensation; integrated circuit noise; jitter; phase locked loops; phase noise; voltage-controlled oscillators; 0.35 micron; 450 MHz; 900 MHz; CMOS process; CMOS self-regulating VCO; adaptive delay cell; built-in compensation circuit; cycle-to-cycle rms jitter; delay variation correction; device noise rejection; low supply sensitivity; phase noise; prototype phase-locked loop; supply fluctuation; voltage-controlled oscillator; Active noise reduction; Circuit noise; Clocks; Delay; Low-frequency noise; Noise shaping; Phase noise; System-on-a-chip; Voltage; Voltage-controlled oscillators;

fLanguage

English

Journal_Title

Solid-State Circuits, IEEE Journal of

Publisher

ieee

ISSN

0018-9200

Type

jour

DOI

10.1109/JSSC.2003.820881

Filename

1261287