Title :
Second generation switched-current signal processing
Author :
Hughes, John B. ; Macbeth, Ian C. ; Pattullo, Douglas M.
Author_Institution :
Philips Res. Lab., Redhill, UK
Abstract :
A switched-current integrator configuration with greatly improved sensitivity to transistor mismatch is described. Forward-Euler, backward-Euler, and bilinear-z mappings are described, as well as an integrator which responds to the derivative of the input current. An universal integrator configuration which performs an identical algorithm to a well-known switched-capacitor universal integrator is developed. It can be used to translate known switched-capacitor filter topologies into switched-current counterparts, as is demonstrated by the simulation of a sixth-order low-pass filter
Keywords :
active filters; active networks; integrating circuits; low-pass filters; switched filters; switched networks; backward Euler mappings; bilinear-z mappings; forward Euler mappings; sixth-order low-pass filter; switched-current integrator; switched-current signal processing; transistor mismatch sensitivity; universal integrator configuration; Cutoff frequency; Delay; Low pass filters; MOSFETs; Signal generators; Signal processing; Signal processing algorithms; Switches; Switching circuits; Voltage;
Conference_Titel :
Circuits and Systems, 1990., IEEE International Symposium on
Conference_Location :
New Orleans, LA
DOI :
10.1109/ISCAS.1990.112593
