Title :
Exact design of high-frequency SC circuits with low-gain op amps
Author :
Baschirotto, A. ; Castello, R. ; Montecchi, F.
Author_Institution :
Dipartimento di Elettronica, Univ. di Padova, Pavia, Italy
Abstract :
The use of high-speed operational amplifiers (op-amps) with low but precisely known DC gain allows the design of precise switched capacitor (SC) circuits with very high sampling frequency. The effect of the finite op-amp DC gain is considered with proper capacitor design; no idle phase is required to compensate errors, and double sampled structures can be implemented. The error due to deviations of the op-amp gain from its nominal value is evaluated. An example of a second-order cell is given
Keywords :
operational amplifiers; signal sampling; switched capacitor networks; capacitor design; double sampled structures; high-frequency SC circuits; low-gain op amps; op-amp gain; sampling frequency; second-order cell; Bandwidth; Capacitors; Circuit topology; Filters; Frequency; Operational amplifiers; Performance gain; Sampling methods; Transfer functions; VHF circuits;
Conference_Titel :
Circuits and Systems, 1993., ISCAS '93, 1993 IEEE International Symposium on
Conference_Location :
Chicago, IL
Print_ISBN :
0-7803-1281-3
DOI :
10.1109/ISCAS.1993.393896
