Design of Butterworth Filter Based on Switch-Capacitance and Its PSpice Simulation
Fuming Wang · Modern Electronics Technique · 2007
By adopting switch-capacitance technology,Butterworth filter circuit could be alternated and simplified.Using LF411 operation amplifier and macro-model of a switch-capacitance in time-domain,its clock frequency is alterable.PSpice simulator show that,the simulation results are very agreement with the theoretical values.It supplies plenitude foundation for design aftertime.