A 1.5-V current-mode capacitance multiplier

Author

Ferri, G. ; Pennisi, S.

Author_Institution

Dipartimento di Ingegneria Elettrica, L´´Aquila Univ., Italy

fYear

1998

fDate

6/20/1905 12:00:00 AM

Firstpage

9

Lastpage

12

Abstract

In this work the problem of obtaining capacitance values higher than those normally integratable and/or provided by capacitive transducers has been investigated. The solution here proposed consists of a capacitance multiplier made up of a current conveyor and a current operational amplifier which allows accurate capacitance factors up to 100 to be achieved. Moreover, thanks to the use of the current mode approach, low supply voltage operations (profitable in portable sensor systems) are obtained. The whole topology has been designed in a standard 0.5-μm CMOS technology with a 1.5-V supply voltage and micropower consumption. SPICE simulations show a good agreement with the expected results and confirm an accurate multiplication factor for capacitances higher than 1 pF

Keywords

CMOS analogue integrated circuits; SPICE; analogue multipliers; circuit simulation; current conveyors; current-mode circuits; low-power electronics; 0.5 micron; 1.5 V; CMOS technology; SPICE simulations; capacitance factors; current conveyor; current operational amplifier; current-mode capacitance multiplier; low supply voltage operation; micropower consumption; multiplication factor; Analog integrated circuits; Application specific integrated circuits; CMOS technology; Capacitance; Capacitors; Impedance; Low voltage; Sensor systems; Silicon; Topology;

fLanguage

English

Publisher

ieee

Conference_Titel

Microelectronics, 1998. ICM '98. Proceedings of the Tenth International Conference on

Conference_Location

Monastir

Print_ISBN

0-7803-4969-5

Type

conf

DOI

10.1109/ICM.1998.825555

Filename

825555