Design of an integrated low power high CMRR instrumentation amplifier for biomedical applications

Prior, Cesar Augusto; Rodrigues, Cesar Ramos; Batista, Carlos Leandro Gomes; Aita, A.L.; Vieira, Filipe Costa Beber

doi:10.1145/1284480.1284506

Cited by 7 publications

(14 citation statements)

References 11 publications

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“…The results are summarized in Table 1. The CMRR recording of the propsed CMIA is comparable with the implementations in [14][15][16]. …”

Section: Simulation Results and Discussionmentioning

confidence: 79%

Current-Mode Rail-to Rail Instrumentation Amplifier for General Purpose Instrumentation Applications

Cini

2016

International Journal of Applied Mathematics, Electronics and Computers

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Instrumentation amplifiers are used extensively in bio-potential reading, industrial sensor applications, Wheatstone bridge amplifiers etc. In this work, a high input common-mode range instrumentation amplifier is presented. The amplifier is composed of two second generation current conveyors (CCII+) with common-mode input range close to supply swings and a differential difference current conveyor (DDCC) at the second stage with high voltage swing at the output. Also an optional DC servo loop is employed as a feedback to second stage for the removal of any possible DC offset voltage at the output which can be used for AC coupled applications. The simple design strategy with high input common-mode range and nearly rail-to-rail output stage together with increased bandwidth advantage of current-mode approach makes the proposed implementation desirable for many of the general purpose instrumentation applications. The design is made using 0.35μm AMS technology with 3V supply voltage. The operation is verified by HSPICE simulations.

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“…The results are summarized in Table 1. The CMRR recording of the propsed CMIA is comparable with the implementations in [14][15][16]. …”

Section: Simulation Results and Discussionmentioning

confidence: 79%

Current-Mode Rail-to Rail Instrumentation Amplifier for General Purpose Instrumentation Applications

Cini

2016

International Journal of Applied Mathematics, Electronics and Computers

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“…References [6] and [8] are monolithic implementations based on [4], and are not worried about V i,cm ranging. Reference [9] is a current conveyor-based topology implemented with discrete components, and V i,cm ranging is not reported.…”

Section: Discussion Of Results and Improvementsmentioning

confidence: 99%

“…1(b) was used in CMIA implementations reported in [5,6,8]. The series association of the current mirror with a common source output stage causes a reduction in the voltage swing in the current mirror, thus limiting the IA CMIR.…”

Section: Current Mirrors Topologiesmentioning

confidence: 99%

“…If the op amps are built with a single differential pair, the CMIR is very limited. Furthermore, if a current mirror is inserted in series with the op amp, the CMIR is more affected [5,6,8]. So, in order to achieve wider CMIR, op amps should meet both input and output rail-to-rail.…”

Section: I/o Rail-to-rail Op Ampsmentioning

confidence: 99%

“…Most of current mode instrumentation amplifiers (CMIA) implementations stacks current mirrors in series with op amps, degrading the V i,cm [4][5][6][7][8][9]. A solution to improve V i,cm is proposed in [10], but the output swing is affected by the current mirror limited swing.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Current mode instrumentation amplifier with rail-to-rail input and output

Vieira

Prior

Rodrigues

et al. 2008

Analog Integr Circ Sig Process

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This paper presents the results from an investigation on the implementation of Current Mode Instrumentation Amplifiers (CMIAs) with rail-to-rail operational amplifiers (op amp) with a gm control circuit. The objective of employing rail-to-rail op amps in the implementation of a CMIA is the improvement of the common-mode operation range. The enhancement of the input common mode range (ICMR) is obtained using op amps with a rail-to-rail input stage followed by a cascode-based output stage. A prototype of the CMIA was implemented in standard 0.6 lm XFAB CMOS technology. Test results showed that the CMIA common mode range was extended but with moderated CMRR. To minimize this issue the amplifier was re-designed and sent to fabrication. Simulations with the components variations included were performed and showed the enhancement of the CMRR can be expected.

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Digitally programmable analog building block and an application

Beg¹,

Maheshwari²

2013

Impact-2013

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Design of an integrated low power high CMRR instrumentation amplifier for biomedical applications

Cited by 7 publications

References 11 publications

Current-Mode Rail-to Rail Instrumentation Amplifier for General Purpose Instrumentation Applications

Current-Mode Rail-to Rail Instrumentation Amplifier for General Purpose Instrumentation Applications

Current mode instrumentation amplifier with rail-to-rail input and output

Digitally programmable analog building block and an application

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