An enhanced current-mode instrumentation amplifier

Gift, Stephan J. G.

doi:10.1109/19.903882

Cited by 57 publications

(29 citation statements)

References 2 publications

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“…In the CMOS-based digital control techniques [12,13,18] the additional stages of transistors are added to terminal of the current conveyor to get the increased current with terminal that can be controlled by the digital word. For getting current two times of , the width of the transistors is increased by two times, and for 4 X current the width of transistors should be four times.…”

Section: Digitally Programmable Differential Voltage Current Conveyormentioning

confidence: 99%

“…The digital control also adds reconfigurability and enhances the performance of the circuit [12][13][14][15]. The transistors can be switched on/off by digital word inputs.…”

Section: Introductionmentioning

confidence: 99%

“…A digital controlled CMOS voltage gain amplifier (VGA) was proposed which was used a digitally programmable current conveyor [12]. Additionally, CMOS-based digitally 2 VLSI Design programmable current conveyor II has been utilized to control the current of + terminal [13]. In addition to this, the technique of [14] used current division cell (CDC) to realize the digitally programmable current follower (DP-CF).…”

Section: Introductionmentioning

confidence: 99%

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Carbon Nanotubes-Based Digitally Programmable Current Follower

2018

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The physical constraints of ever-shrinking CMOS transistors are rapidly approaching atomistic and quantum mechanical limits. Therefore, research is now directed towards the development of nanoscale devices that could work efficiently in the sub-10 nm regime. This coupled with the fact that recent design trend for analog signal processing applications is moving towards currentmode circuits which offer lower voltage swings, higher bandwidth, and better signal linearity is the motivation for this work. A digitally controlled DVCC has been realized using CNFETs. This work exploited the CNFET's parameters like chirality, pitch, and numbers of CNTs to perform the digital control operation. The circuit has minimum number of transistors and can control the output current digitally. A similar CMOS circuit with 32 nm CMOS parameters was also simulated and compared. The result shows that CMOS-based circuit requires 418.6 W while CNFET-based circuit consumes 352.1 W only. Further, the proposed circuit is used to realize a CNFET-based instrumentation amplifier with digitally programmable gain. The amplifier has a CMRR of 100 dB and ICMR equal to 0.806 V. The 3 dB bandwidth of the amplifier is 11.78 GHz which is suitable for the applications like navigation, radar instrumentation, and high-frequency signal amplification and conditioning.

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Section: Digitally Programmable Differential Voltage Current Conveyormentioning

confidence: 99%

“…The digital control also adds reconfigurability and enhances the performance of the circuit [12][13][14][15]. The transistors can be switched on/off by digital word inputs.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Carbon Nanotubes-Based Digitally Programmable Current Follower

2018

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“…Although CMIA in Fig. 1 gives good performance without resistor matching requirements, improved configurations are proposed utilizing both outputs of the current conveyors [2,[5][6][7]. In this paper, two of the CCII+ elements with high input common-mode range with high output swing close to rail-to-rail swing is employed at the input stage.…”

Section: Introductionmentioning

confidence: 99%

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 error can be reduced by using an extra CCII. Gift [19] gives an example in which he uses two Cells to design an instrumentation amplifier. The parasitic capacitor C z introduces a lowpass property of the circuits, and Rz sometimes creates non-negligible errors when other resistances in the circuits are not small enough compared to it and they can not be compensated.…”

Section: R-----------------------------------------------------------mentioning

confidence: 99%

New families of voltage-mode and current-mode filter circuits.

Qian

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An enhanced current-mode instrumentation amplifier

Cited by 57 publications

References 2 publications

Carbon Nanotubes-Based Digitally Programmable Current Follower

Carbon Nanotubes-Based Digitally Programmable Current Follower

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

New families of voltage-mode and current-mode filter circuits.

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