On the Mechanical Chopper for the Chopper Amplifier (Part 1) : The Relation Between the Conversion Efficiency and Contact Rate [PDF]
, 1962 Though the various studies on the chopper amplifier (the contact modulated amplifier) have been reported, but those on the chopper itself are not so many. In the formers, the chopping action is assumed to be an ideal ON - OFF action.
松山, 潔
core +1 more source
Applied Sciences, 2022 A low-noise and -power readout integrated circuit (IC) for two-electrode electrocardiogram (ECG) recording is developed in this study using a common-mode charge pump (CMCP) for a robust 20-VPP common-mode interference (CMI).
Kyeongsik Nam +7 more
doaj +1 more source
Design of sigma-delta modulator 10-16 bits for resolver digital converter
Dianzi Jishu Yingyong, 2022 In this paper, a sigma-delta modulator for 10-16 bit resolver digital converter is designed. The modulator is a second-order structure. On this basis, a chopper modulator circuit is added to eliminate the flicker noise.
Gu Jun, Zhang Guohua, Zhu Xiaoyu
doaj +1 more source
Fully Integrated Biopotential Acquisition Analog Front-End IC
Sensors, 2015 A biopotential acquisition analog front-end (AFE) integrated circuit (IC) is presented. The biopotential AFE includes a capacitively coupled chopper instrumentation amplifier (CCIA) to achieve low input referred noise (IRN) and to block unwanted DC ...
Haryong Song +3 more
doaj +1 more source
A 5.5 µW 42nV/√ Hz Chopper stabilized Amplifier for Biomedical Application with Input Impedance Enhancement [PDF]
, 2021 The continuous real-time monitoring of diverse physical parameters using biosignals like ECG and EEG requires the biomedical sensors. Such sensor consists of analog front-end unit for which low noise and low power Operational transconductance amplifier ...
Naik, Amisha, Adesara, Ankit
core
A 5-nV/√Hz Chopper Negative-R Stabilization Preamplifier for Audio Applications
Micromachines, 2020 This paper presents a low-noise and low-power audio preamplifier. The proposed low-noise preamplifier employs a delay-time chopper stabilization (CHS) technique and a negative-R circuit, both in the auxiliary amplifier to cancel the non-idealities of the
Jamel Nebhen +2 more
doaj +1 more source
A low-power chopper bandpass amplifier for biopotential sensors
, 2016 A low-power low-noise chopper operational amplifier for biosensor applications is proposed. It employs a simple ripple suppression method using a band-pass amplifier. The input referred noise is only 43nV/rtHz. Fabricated in a 130nm standard CMOS process,
Tsui, Chi Ying +5 more
core +1 more source
Solid state optical conjugated polymer amplifier; with ultrafast gain switching [PDF]
, 2008 Conjugated polymers are organic materials which are attractive as optoelectronic devices because they have a combination of broad band emission, high gain, versatility in processing, are ductile and can be electrically pumped.
Amarasinghe, Dimali C. V.
core +2 more sources
A Novel Infrared Temperature Measurement with Dual Mode Modulation of Thermopile Sensor
Sensors, 2019 Superior to the traditional infrared temperature sensing architecture including infrared sensor and thermistor, we propose a novel sensing approach based on a single thermopile sensor with dual modes modulation.
Chih-Hsiung Shen +2 more
doaj +1 more source
A 192nW inverter-based chopper instrumentation amplifier for micropower ECG applications
, 2014 This paper proposes a low-power inverter-based chopper instrumentation amplifier (IA) for ECG applications. A capacitively-coupled topology with chopper is employed while a two-stage inverter-based amplifier serves as the gain stage. Pseudo resistors are
Wang, Jiayi +15 more
core +1 more source