Results 21 to 30 of about 16,972 (295)
Applied Sciences, 2021 This paper presents a potentiostat readout circuit with low-noise and mismatch-tolerant current mirror using chopper stabilization and dynamic element matching (DEM) for electrochemical sensors.
Kyeongsik Nam +4 more
doaj +1 more source
IEEE Journal of Solid-State Circuits, 1986 This paper presents a CMOS chopper amplifier realized with a 2nd order low-pass selective amplifier, using continuous-time filtering technique. The circuit has been integrated in a 3 ?m p-well low-voltage CMOS technology. The chopper DC gain is 32 dB with 200 Hz bandwidth.
Christian Enz +2 more
openaire +1 more source
An implantable epileptic signal detector with wireless charging and wireless communication
Dianzi Jishu Yingyong, 2018 An epileptic signal detector with wireless charging and wireless communication is proposed in this work, which can be used to build a closed-loop neurostimulator.
Qian Nixin +6 more
doaj +1 more source
A Micropower Chopper—CDS Operational Amplifier [PDF]
IEEE Journal of Solid-State Circuits, 2010 A low-power spur-free precision amplifier, which uses input chopping and correlated double sampling for demodulation, is presented. This circuit employs an AC coupling between the first and the second stage that removes the first stage offset without causing ripple.
BELLONI, MASSIMILIANO +3 more
openaire +2 more sources
IEEE Access, 2023 This paper presents a low-noise chopper-stabilized zero-drift amplifier with successive approximation register (SAR)-assisted automatic offset calibration loop (AOCL).
Gibae Nam +9 more
doaj +1 more source
Ripple Suppression in Capacitive-Gain Chopper Instrumentation Amplifier Using Amplifier Slicing [PDF]
IEEE Transactions on Circuits and Systems I: Regular Papers, 2021 This paper proposes a power-up calibration scheme to mitigate the offset of a capacitive-gain chopper instrumentation amplifier (CCIA), thus suppressing the offset-induced output ripple. In this design, the first stage of the error amplifier is formed by multiple identical slices. Before normal operation, the offset polarity of each slice is determined
Tsz Ngai Lin, Bo Wang, Amine Bermak
openaire +1 more source
Journal of Low Power Electronics and Applications, 2017 In this paper, parameters related to the sensitivity of the interface circuits for capacitive sensors are determined. Both the input referred noise and capacitance of the input transistors are important for capacitive sensitivity.
Parisa Vejdani +2 more
doaj +1 more source
Applied Sciences, 2020 This paper presents a low-noise chopper operational amplifier using a lateral PNP input stage with bipolar junction transistor (BJT) current mirror base current cancellation.
Hyungseup Kim +8 more
doaj +1 more source
A 0.35 μm CMOS 17-bit@40-kS/s cascade 2-1 ΣΔ modulator with programmable gain and programmable chopper stabilization [PDF]
, 2005 This paper describes a 0.35μm CMOS chopper-stabilized Switched-Capacitor 2-1 cascade ΣDelta; modulator for automotive sensor interfaces. For a better fitting to the characteristics of different sensor outputs, the modulator includes a programmable set of
Escalera Morón, Sara +5 more
core +1 more source
A High TCMRR, Inherently Charge Balanced Bidirectional Front-End for Multichannel Closed-Loop Neuromodulation [PDF]
, 2019 This paper describes a multichannel bidirectional front-end for implantable closed-loop neuromodulation. Stimulation artefacts are reduced by way of a 4-channel H-bridge current source sharing stimulator front-end that minimizes residual charge drops in ...
Delgado Restituto, Manuel +4 more
core +1 more source