A low-sensitivity switched-capacitance VCO

Author

Peterson, Matthew C. ; Kuhn, William B.

Author_Institution

Kansas State Univ., Manhattan, KS, USA

Volume

2

fYear

2001

fDate

2001

Firstpage

793

Abstract

A low sensitivity switched capacitance VCO is described along with its use in a fully-integrated, student-designed Bluetooth transmitter. Using a switched capacitor method to tune the VCO reduces the required sensitivity and tuning range of the VCO and reduces the lock time of the PLL. An open loop architecture is used for the transmitter and the low sensitivity VCO reduces frequency drift usually associated with this architecture. MOSCAPs are used for the digital tuning and design considerations for max to min capacitance ratio are discussed. Simulation results using Agilent EESof are shown

Keywords

CMOS analogue integrated circuits; circuit tuning; integrated circuit design; radio transmitters; radiofrequency oscillators; switched capacitor networks; voltage-controlled oscillators; Agilent EESof; MOSCAPs; PLL lock time; digital tuning; fully-integrated Bluetooth transmitter; low sensitivity SC VCO; max to min capacitance ratio; open loop architecture; student-designed Bluetooth transmitter; switched capacitance VCO; switched capacitor method; tuning range; Bluetooth; Capacitance; Capacitors; Fluctuations; Frequency; Phase locked loops; Transceivers; Transmitters; Tuning; Voltage-controlled oscillators;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 2001. MWSCAS 2001. Proceedings of the 44th IEEE 2001 Midwest Symposium on

Conference_Location

Dayton, OH

Print_ISBN

0-7803-7150-X

Type

conf

DOI

10.1109/MWSCAS.2001.986306

Filename

986306