Title :
Current-mode switched-capacitor circuit synthesis by C-invariant dual transformation
Author :
Wang, G.H. ; Watanabe, Kenzo
Author_Institution :
Res. Inst. of Electron., Shizuoka Univ., Hamamatsu, Japan
Abstract :
The dual transformation which keeps a capacitor invariant is proposed for the synthesis of current-mode switched-capacitor (SC) circuits from their voltage-mode counterparts. A switch is also invariant to this transformation if regarded as a voltage-controlled capacitance which assumes an infinite capacitance when on and zero capacitor when off. A resistor can be replaced, in discrete-time sense, by a capacitor and switches. Therefore, the original network in a voltage-domain can be an active-or passive-RC or SC circuit. Two examples are given to show the synthesis procedure. The transfer function of a synthesized current-mode SC filter is compared experimentally with that of the original to demonstrate its validity
Keywords :
network synthesis; switched capacitor networks; C-invariant dual transformation; RC circuit; SC circuit; SC filter; active circuits; circuit synthesis; current-mode; switched-capacitor; voltage-controlled capacitance; Capacitance; Circuit synthesis; Filters; Network synthesis; Resistors; Switched capacitor circuits; Switches; Switching circuits; Transfer functions; Zero voltage switching;
Conference_Titel :
Circuits and Systems, 1991., IEEE International Sympoisum on
Print_ISBN :
0-7803-0050-5
DOI :
10.1109/ISCAS.1991.176673
