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

fYear

1991

fDate

11-14 Jun 1991

Firstpage

1553

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 1991., IEEE International Sympoisum on

Print_ISBN

0-7803-0050-5

Type

conf

DOI

10.1109/ISCAS.1991.176673

Filename

176673