Title :
A 10.7-MHz 68-dB SNR CMOS continuous-time filter with on-chip automatic tuning
Author :
Silva-Martinez, José ; Steyaert, Michel S J ; Sansen, Willy
Author_Institution :
Dept. of Electr. Eng., Katholieke Univ., Leuven, Belgium
fDate :
12/1/1992 12:00:00 AM
Abstract :
A maximally flat 10.7-MHz fourth-order bandpass filter with an on-chip automatic tuning system is presented. The signal-to-in-band integrated noise ratio (SNR) of the automatically tuned filter is around 68 dB. The third intermodulation distortion (IM3) is lower than -40 dB for a two-tone input signal of 3.2 V peak to peak (Vp-p). The complete system operates with supply voltages of ±2.5 V. The power consumption of the system is 220 mW. All this has been achieved due to the use of a low-distortion transconductor, the development of a high-frequency CMOS resistor, and the realization of an advanced on-chip automatic tuning system for both frequency and bandwidth control. The chip has been fabricated in a standard 1.5-μm n-well CMOS process
Keywords :
CMOS integrated circuits; active filters; automatic frequency control; band-pass filters; intermodulation; linear integrated circuits; 1.5 micron; 10.7 MHz; 220 mW; CMOS continuous-time filter; automatic frequency control; bandwidth control; fourth-order bandpass filter; high-frequency CMOS resistor; low-distortion transconductor; n-well CMOS process; on-chip automatic tuning; power consumption; signal-to-in-band integrated noise ratio; third intermodulation distortion; two-tone input signal; Band pass filters; Energy consumption; Frequency; Intermodulation distortion; Resistors; Signal to noise ratio; System-on-a-chip; Transconductors; Tuning; Voltage;
Journal_Title :
Solid-State Circuits, IEEE Journal of
