Title :
Charge programming techniques for SC biquads
Author :
Martins, F.P. ; Paulino, N.F. ; Franca, J.E.
Author_Institution :
DGMT, Lisboa, Portugal
Abstract :
A novel technique is presented for electrical programmability of switched capacitor biquadratic sections based on the concept of charge-programmability realized using digitally-programmable quasi-passive circuits. Some examples of filtering functions found in practical telephone signaling applications are discussed. The technique can achieve a high degree of programmability with much less capacitor area than would be required using currently available programming techniques
Keywords :
biquadratic filters; programmable filters; switched capacitor filters; telecommunication signalling; SC biquads; charge-programmability; digitally-programmable quasi-passive circuits; electrical programmability; filtering functions; switched capacitor biquadratic sections; telephone signaling applications; Application specific integrated circuits; Capacitance; Digital control; Digital integrated circuits; Filtering; Functional programming; Pulse amplifiers; Switched capacitor circuits; Switching circuits; Telephony;
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.1993.393933
