Results 261 to 270 of about 1,664 (293)

Chopper Stabilization of Analog Multipliers, Variable Gain Amplifiers, and Mixers

IEEE Journal of Solid-State Circuits, 2008
We describe a general offset-canceling architecture for analog multiplication using chopper stabilization. Chopping is used to modulate the offset away from the output signal where it can be easily filtered out, providing continuous offset reduction which is insensitive to drift.
Philip A. Godoy, Joel L. Dawson
openaire   +1 more source

Reducing impact of degradation on analog circuits by chopper stabilization and autozeroing

2011 12th International Symposium on Quality Electronic Design, 2011
This paper shows that chopper stabilization and autozeroing, commonly used to eliminate offset and low frequency noise, can also significantly reduce the effects of transistor degradation caused by hot carrier and BTI stress in analog circuits. An open loop amplifier circuit designed in a 32nm high-κ, metal gate technology is investigated by circuit ...
Shailesh More, Michael Fulde, Florian Chouard, Doris Schmitt-Landsiedel   +3 more
openaire   +1 more source

A Chopper Stabilized Pre-amplifier for Biomedical Signal Acquisition

2007 International Symposium on Integrated Circuits, 2007
This paper presents a low-power and low-voltage pre-amplifier for biomedical signal acquisition application. The main blocks of the pre-amplifier consist of a chopper stabilized VGA, and a 4th order filter. The amplifier serves to improve the noise figure at low frequency by extensively modulating the flicker noise to the 16 kHz chopper frequency.
Grani A. Hanasusanto, Yuanjin Zheng
openaire   +1 more source

A vaersatile chopper-stabilized rail-to-rail operational amplifier

2008 51st Midwest Symposium on Circuits and Systems, 2008
This paper presents the design and measured results of a low power high bandwidth versatile rail-to-rail input/output chopper-stabilized amplifier. The core of the amplifier is a folded-cascode OTA, with complementary input pairs for rail-to-rail input capability, a push-pull class-AB output stage is used to provide rail-to-rail output capability.
null Fuding Ge, Bahar Jalali-Farahani
openaire   +1 more source

E/D NMOS chopper-stabilized op AMP

Journal of Electronics (China), 1988
This paper discusses the design method of E/D NMOS chopper-stabilized op amp. The offset factors are analyzecd and the new formulae are derived. The test circuit is simulated with the SPICE-II, and the experiment of the test chip shows a satisfactory result.
Zheng Junli, Gong Mingfu, Li Yongming
openaire   +1 more source

A low-power and low-complexity chopper-stabilized amplifier

2011 IEEE International Conference of Electron Devices and Solid-State Circuits, 2011
In this paper, a low-power, low-complexity chopper amplifier was proposed. The equivalent input noise and offset is reduced by using the chopper stabilization technique with a chopping frequency of 1.0 MHz. Based on a 0.35µm CMOS technology with power supply of 3.3V, the chopper amplifier was designed successfully with chip area of 0.02 mm2 and power ...
K. Wang, Z. H. Wu, M. J. Zhao, B. Li
openaire   +1 more source

Design of Chopper Stabilized Preamplifier for ECG monitoring System

2018 4th International Conference on Devices, Circuits and Systems (ICDCS), 2018
This paper proposes a high gain Chopper stabilized preamplifier for the ECG monitoring system. In analog based ECG acquisition front end, a low noise amplifier is required to have a large dynamic range of 0.1 to 250Hz. A Chopper stabilized preamplifier is proposed which has high gain and removes the flicker noise.
A. Uma, C. SelvaGangai, P. Kalpana
openaire   +1 more source

Chopper-stabilized amplifiers with a track-and-hold signal demodulator

IEEE Transactions on Circuits and Systems I: Fundamental Theory and Applications, 1999
The conventional signal demodulator of a chopper amplifier can be substituted by track-and-hold (T/H) and averaging functions. This arrangement provides offset cancellation without requiring low-pass filters and can ignore the residual offset generated by input spikes.
A. Bilotti, G. Monreal
openaire   +1 more source

A Novel Way for Using Chopper Method to Stabilize Amplifier

2009 Asia-Pacific Power and Energy Engineering Conference, 2009
In this paper, historical background and fundamental concept of chopper stabilized amplifiers are introduced. Then effects of noise and residual offset are analyzed. Several techniques to reduce the residual offset are proposed. Also some of the disadvantages of chopper stabilization technique, as compared to correlated double sampling technique, are ...
Yanfeng Jiang, Xiaobo Zhang, Bing Yang
openaire   +1 more source

Chopper-Stabilized Bidirectional Current Acquisition Circuits for Electrochemical Amperometric Biosensors

IEEE Transactions on Circuits and Systems I: Regular Papers, 2013
Two low-noise bidirectional current acquisition circuits for interfacing with electrochemical amperometric biosensor arrays are presented. The first design is a switched-capacitor transimpedance amplifier (TIA). The second design is a current conveyer (CC) with regulated-cascode current mirrors.
Hamed Mazhab-Jafari, Roman Genov
openaire   +1 more source