Title :
D-MRC: digitally programmable MOS resistive circuit
Author :
Alarcón, E. ; Martinez, H. ; Vidal, E. ; Madrenas, J. ; Poveda, A.
Author_Institution :
Departamento de Ingenieria Electronica, Univ. Politecnica de Catalunya, Barcelona, Spain
Abstract :
This paper presents the D-MRC circuit, a mixed-signal cell which operates as a digitally-controlled differential resistor, and that is suited to programmable continuous-time MOSFET-C filter applications. The cell is based on a digitally-controlled extension of the MRC (MOS Resistive Circuit) cell, in which digital tunability is obtained by embedding in the same MRC transistors both the triode-region and switch functions, providing a compact implementation that preserves circuit performance. This cell is of interest for static and dynamic reconfigurability of mixed-signal circuits, as required in multistandard wireless CMOS receivers. The proposed cell has been designed down to the layout level for a particular prototype with 3-bit digital controllability in 0.8 μm CMOS technology. Post-layout simulation results validate the functionality of the proposed cell and its application to a digitally-tunable continuous-time MOSFET-C filter
Keywords :
MOS integrated circuits; circuit tuning; continuous time filters; mixed analogue-digital integrated circuits; programmable circuits; programmable filters; 0.8 micron; D-MRC; continuous-time MOSFET-C filter; differential resistor; digital tunability; digitally programmable MOS resistive circuit; dynamic reconfigurability; mixed-signal cell; multistandard wireless CMOS receiver; static reconfigurability; CMOS technology; Circuit optimization; Circuit simulation; Controllability; Digital filters; MOSFET circuits; Prototypes; Resistors; Switches; Switching circuits;
Conference_Titel :
Circuits and Systems, 2001. MWSCAS 2001. Proceedings of the 44th IEEE 2001 Midwest Symposium on
Conference_Location :
Dayton, OH
Print_ISBN :
0-7803-7150-X
DOI :
10.1109/MWSCAS.2001.986152
