An improved current mode instrumentation amplifier

Abstract

A current mode Instrumentation amplifier in CMOS technology, is presented. The circuit is based on the use of two positive current conveyors of second generation and a current differential output stage. The device exhibits high common-mode rejection ratio which is gain unaffected in a wide frequency band. SPICE simulation results are promising for high frequency medical applications.

An electronically controllable instrumentation amplifier based on CCCCTAs

“…In addition, low voltage and low power operation are desirable in most circuits, especially in portable electronics systems. Consequently, current-mode instrumentation amplifiers (CMIAs) have been recently proposed to response these demands [4][5][6][7][8][9][10][11][12][13][14]. Nowadays, the instrumentation amplifier working in current-mode has being been more popular than voltage-mode one.…”

Generalised operational floating current conveyor based instrumentation amplifier

“…The details of available IAs are comprehended in Table 1 and following points are observed: † Most of the available IAs [6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25] can process data sensed by voltage sensor but need current to voltage converter for processing current sensors' data. † The IAs [6,[26][27][28][29] are suitable to process data available from current sensor and provide current [26,29] and voltage outputs [6,27,28].…”

“…† The IAs may be categorised as voltage mode (VM), current mode (CM), transadmittance mode (TAM) and transimpedance mode (TIM) on the basis of input and output signals. Accordingly the IAs presented in [6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25], [17], [26][27][28][29] and [6,27,28] are VM, TAM, CM and TIM IAs, respectively. † Though the input impedance of VM topologies [6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25] is high, the output is not available at low impedance [6, 12-14, 16-18, 21, 22...…”

Current differential amplifiers: new circuits and applications

“…The topologies of most CDAs are based on current mirror structures, interconnected in various ways. Simple structures of current di erential ampliÿers can be derived by using topologies of one or two current mirrors [1][2][3]. The common mode performance of these circuits, however, is poor.…”