High CMRR, Low Power and Wideband Current-Mode Instrumentation Amplifier

Author

Babaei, Behnam ; Mirzakuchaki, Sattar

Author_Institution

K.N. Toosi Univ. of Technol., Tehran

fYear

2006

fDate

Nov. 2006

Firstpage

121

Lastpage

124

Abstract

The current-mode instrumentation amplifier based on second-generation current conveyors (CCII) offers many benefits over conventional instrumentation amplifier architectures. It does not need any matched components to achieve high CMRR and its bandwidth is not gain-bandwidth product limited. Therefore, the wideband CMOS current conveyor has been used in this structure. HSPICE simulations have shown that its performance is quite satisfactory for wideband current-mode signal processing. Furthermore, different CMRR enhancement techniques of current-mode instrumentation amplifiers are discussed. The new simulated instrumentation amplifier provides approximately 40 dB of improvement on the high-frequency CMRR up to the 3-dB corner frequency and even higher. In addition, composite conveyor techniques improving the instrumentation amplifier performance are presented

Keywords

CMOS integrated circuits; SPICE; current conveyors; current-mode circuits; instrumentation amplifiers; low-power electronics; signal processing; wideband amplifiers; CMRR; HSPICE simulations; composite conveyor techniques; current-mode instrumentation amplifier; low power amplifier; second-generation current conveyors; wideband CMOS current conveyor; wideband amplifier; wideband current-mode signal processing; Bandwidth; Broadband amplifiers; Circuits; High power amplifiers; Instruments; Operational amplifiers; Resistors; Signal processing; Voltage; Wideband; CMRR; current-mode instrumentation amplifier; low power; wideband CMOS current conveyor;

fLanguage

English

Publisher

ieee

Conference_Titel

Norchip Conference, 2006. 24th

Conference_Location

Linkoping

Print_ISBN

1-4244-0772-9

Type

conf

DOI

10.1109/NORCHP.2006.329258

Filename

4126961