Title :
An Equalized Ultra-Wideband Channel-Select Filter with a Discrete-Time Charge-Domain Band-Pass IIR Filter
Author :
Yoshizawa, Atsushi ; Iida, Sachio
Author_Institution :
Sony Corp., Tokyo
Abstract :
An ultra-wideband channel-select filter with equalized pass-band characteristics has been implemented with a 0.13 mum CMOS technology. A discrete-time charge-domain IIR band-pass filter is used to compensate degradation of the 3rd-order continuous-time LC-LPF and the sine response of the 1st-order charge-domain LPF, thus significantly equalizing the total filter response through clock signals. Measurements show that the IIR BPF reshapes the pass-band, allowing a 3-dB bandwidth of 500 MHz with a notch at 1 GHz. The total filter, including 3rd-order LC-LPF, 1st-order sine LPF, 1st-order IIR BPF, and clock generator, dissipates 18.8 mW from a 1.2-V supply voltage.
Keywords :
CMOS integrated circuits; IIR filters; band-pass filters; discrete time filters; low-pass filters; notch filters; ultra wideband technology; CMOS technology; bandwidth 500 MHz; charge-domain band-pass IIR filter; clock generator; clock signals; discrete-time IIR filter; equalized pass-band characteristics; filter response; first-order IIR BPF; first-order charge-domain LPF; first-order sine LPF; power 18.8 mW; size 0.13 mum; third-order continuous-time LC-LPF; ultra-wideband channel-select filter; voltage 1.2 V; Band pass filters; CMOS technology; Circuits; Clocks; Degradation; Frequency response; IIR filters; Low pass filters; Sampling methods; Ultra wideband technology;
Conference_Titel :
Custom Integrated Circuits Conference, 2007. CICC '07. IEEE
Conference_Location :
San Jose, CA
Print_ISBN :
978-1-4244-1623-3
Electronic_ISBN :
978-1-4244-1623-3
DOI :
10.1109/CICC.2007.4405829
