Title :
Integrated continuous-time balanced filters for 16-b DSP interfaces
Author :
Durham, Anna M. ; Redman-White, William
Author_Institution :
Dept. of Electron. & Comput. Sci., Southampton Univ., UK
fDate :
7/1/1993 12:00:00 AM
Abstract :
A fully integrated, low-distortion, balanced, continuous-time filter fabricated in 5-V, 1.6-μm CMOS is presented. Active RC structures are used in a leapfrog topology, with time constants set by integrated passive resistors and capacitors. Accurate tuning is achieved by selection of capacitor elements under the control of a new calibrator circuit. With a 2-Vrms differential input and output, the filter achieves -94-dB THD (total harmonic distortion) and 95-dB signal-to-noise ratio. Tuning accuracy is maintained to within ±5% of nominal over the commercial temperature range
Keywords :
CMOS integrated circuits; active filters; calibration; linear integrated circuits; tuning; 1.6 micron; 5 V; 95 dB; CMOS; DSP interfaces; SNR; THD; active RC structures; calibrator circuit; capacitor elements; continuous-time balanced filters; integrated passive resistors; leapfrog topology; low-distortion; total harmonic distortion; tuning; Capacitors; Circuit optimization; Digital signal processing; Filters; Frequency; Linearity; Resistors; Switches; Switching circuits; Tuning;
Journal_Title :
Solid-State Circuits, IEEE Journal of
