A 2GHz Tx LO generation circuit with active PPF and 3/2 divider in 65nm CMOS

Author

Törmänen, Markus ; Axholt, Andreas ; Lindstrand, Jonas ; Sjöland, Henrik

Author_Institution

Electr. & Inf. Technol, Lund Univ., Lund, Sweden

fYear

2011

fDate

12-14 Dec. 2011

Firstpage

208

Lastpage

211

Abstract

This paper demonstrates a 2GHz Tx LO generation circuit with 8% tuning range featuring a VCO, an active polyphase filter (PPF), and a 3/2 divider with 50% output signal duty cycle, implemented in a standard 65nm LP CMOS process. The circuit measures a phase noise of -158dBc/Hz at 20 MHz offset frequency, with a power consumption of 29.8mW. It occupies a chip area of 0.53 mm², including pads. The spurious tone at 1GHz, caused by mismatch in the active polyphase filter and frequency divider, is at -50dBc.

Keywords

CMOS integrated circuits; active filters; circuit tuning; frequency dividers; phase noise; voltage-controlled oscillators; LP CMOS process; Tx LO generation circuit; VCO; active PPF; active polyphase filter; duty cycle; frequency 2 GHz; frequency divider; phase noise; power 29.8 mW; size 65 nm; tuning range; Frequency conversion; Frequency measurement; Noise measurement; Phase noise; Radiation detectors; Tuning; Voltage-controlled oscillators; CMOS integrated circuits; Frequency dividers; Polyphase filters; Voltage controlled oscillators;

fLanguage

English

Publisher

ieee

Conference_Titel

Integrated Circuits (ISIC), 2011 13th International Symposium on

Conference_Location

Singapore

Print_ISBN

978-1-61284-863-1

Type

conf

DOI

10.1109/ISICir.2011.6131914

Filename

6131914