Title :
High frequency VCO-derived filters
Author :
Chen, Huiting ; Malik, Saqib Q. ; Geiger, Randall L.
Author_Institution :
Iowa State Univ., Ames, IA, USA
Abstract :
A new method of designing continuous-time monolithic filters derived from well known voltage controlled oscillators (VCOs) is introduced. These VCO-derived filters are capable of operating at very high frequencies in standard CMOS processes. Prototype low-pass and band-pass filter designed in a TSMC 0.25 μm process are discussed. Simulation results for the low-pass filter designed for a cutoff frequency of 6 GHz show a THD of -40 dB for 400 mV input peak-peak sinusoidal input. The band-pass filter has a resonant frequency programmable from 4 GHz to 5.18 GHz, a programmable Q from 4 to 89 and mid-band THD of -40 dB for a 200 mV peak-peak sinusoidal input signal
Keywords :
CMOS analogue integrated circuits; Q-factor; band-pass filters; continuous time filters; harmonic distortion; integrated circuit design; low-pass filters; programmable filters; voltage-controlled oscillators; 0.25 micron; 4 to 5.18 GHz; 6 GHz; CMOS process; Q-factor; THD; TSMC process; band-pass filter; circuit simulation; continuous-time monolithic filter; cut-off frequency; design method; high-frequency filter; low-pass filter; programmable filter; resonant frequency; voltage controlled oscillator; Band pass filters; CMOS process; Capacitance; Delay; Design engineering; Design methodology; Frequency; Low pass filters; Transfer functions; Voltage-controlled oscillators;
Conference_Titel :
Circuits and Systems, 2000. Proceedings of the 43rd IEEE Midwest Symposium on
Conference_Location :
Lansing, MI
Print_ISBN :
0-7803-6475-9
DOI :
10.1109/MWSCAS.2000.951621
