Title :
Infinite impulse response switched-capacitor interpolators with optimum implementation
Author :
Martins, R.P. ; Franca, J.E.
Author_Institution :
Dept. of Electr. Eng. & Comput., Inst. Superior Tecnico, Lisboa, Portugal
Abstract :
A family of infinite-impulse response (IIR) switched-capacitor (SC) interpolator building blocks that provide a sampling-rate increase from Fs to LFs is presented. The speed requirements of the amplifiers are determined by the lower input sampling frequency Fs. By using a complementary structure of their decimator counterparts, the interpolators allow the realization of arbitrary baseband and anti-imaging amplitude responses using a minimum number of switching waveforms. Since they possess similar attractive features with respect to capacitance spread, total capacitor area, and speed requirements of the amplifiers, they are also attractive for integration. The design of a simple third-order IIR SC interpolator building block with a sampling-rate increase of L=2 is illustrated
Keywords :
active networks; interpolation; switched capacitor networks; amplifiers; capacitance spread; complementary structure; decimator counterparts; infinite-impulse response; integration; optimum implementation; sampling-rate increase; speed requirements; switched-capacitor interpolators; third-order IIR SC building block; total capacitor area; Baseband; Capacitance; Capacitors; Finite impulse response filter; Frequency; IIR filters; Operational amplifiers; Polynomials; Sampling methods; Switching circuits;
Conference_Titel :
Circuits and Systems, 1990., IEEE International Symposium on
Conference_Location :
New Orleans, LA
DOI :
10.1109/ISCAS.1990.112296
