Title :
Tunable BiCMOS continuous-time filter for high-frequency applications
Author :
Alini, Roberto ; Baschirotto, Andrea ; Castello, Rinaldo
Author_Institution :
Dept. of Electron., Pavia Univ., Italy
fDate :
12/1/1992 12:00:00 AM
Abstract :
A BiCMOS fully differential transconductor based on MOS transistors operating in the linear region is presented. The circuit has an equivalent nondominant pole located above 1.5 GHz. This makes it suitable for high-frequency continuous-time filters. A second-order low-pass filter using the new transconductor realized in a 2-μm BiCMOS technology is reported. The cutoff frequency f0 of the cell is tunable in the range of 8-32 MHz and the quality factor is 2. The filter THD stays lower than -40 dB for an output signal up to 3.2 Vp-p at 5-MHz frequency. The area of the cell is 0.322 mm2 and the power consumption (with f0 =25 MHz) is 30 mW with a single 5-V power supply
Keywords :
BiCMOS integrated circuits; Q-factor; active filters; linear integrated circuits; low-pass filters; tuning; 2 micron; 30 mW; 8 to 32 MHz; BiCMOS continuous-time filter; BiCMOS fully differential transconductor; MOS transistors; THD; cutoff frequency; equivalent nondominant pole; high-frequency applications; linear region; power consumption; quality factor; second-order low-pass filter; total harmonic distortion; tunable filter; BiCMOS integrated circuits; Clocks; Cutoff frequency; Energy consumption; Low pass filters; MOSFET circuits; Q factor; Signal processing; Transconductors; Tunable circuits and devices;
Journal_Title :
Solid-State Circuits, IEEE Journal of
