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A chopper-stabilized high-pass Delta–Sigma Modulator with reduced chopper charge injection
Microelectronics Journal, 2011In this paper, a chopper-stabilized high-pass Delta-Sigma Modulator (DSM) is reported with experimental results. A new circuit technique to suppress the residual offset caused by the chopper switch charge injection is proposed. Enabled by an amplifier sharing architecture, the technique diverts the error charge generated by the critical chopper to the ...
Yin-Sheng Zhao +3 more
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Transient processes and stability in an LC chopper
IEEE Transactions on Aerospace and Electronic Systems, 1988The analysis of the transient and steady-state processes in LC choppers is presented. The method, used previously for the analysis of processes in grid-connected and self-commutated converters, is adjusted for analysis of LC chopper's processes. The difference equations describing these processes, are obtained and solved. The analytical solution of the
M.A. Slonim, Z.M. Kremer
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Chopper-stabilized operational transconductance amplifiers
IEEE Transactions on Instrumentation and Measurement, 1993A technique for chopper-stabilizing commercial linearized operational transconductance amplifiers (OTAs) to remove output offset current errors is described. Design equations which illustrate performance tradeoffs as a function of component values are given. The results are verified experimentally using a common bipolar OTA. >
S.E. Nordquist +2 more
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A Chopper Stabilized Pre-amplifier for Magnetic Sensor
2012 International Conference on Industrial Control and Electronics Engineering, 2012This paper introduced chopping principle and presented a design of chopper stabilized pre-amplifier for magnetic sensor. Compared with auto-zeroing technique, chopping technique does not fold noise to DC and the noise performance is better. This chopper stabilized pre-amplifier used the integrated instrumentation amplifier AD620 as the main amplifier ...
Zhao Jing, Zhang Shuang, Chen Shudong
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Chopper stabilized integrated Hall effect magnetometer
2009 International Conference on Microelectronics - ICM, 2009This paper presents a low noise, low offset and wide dynamic range Hall effect magnetometer integrated in a 0.35 µm CMOS technology. It features a spinning-current operated Hall device and a chopper stabilization, which has been unconventionally implemented using high-pass filters. The magnetometer exhibits 350 µT offset, can measure magnetic fields up
Cyrius Ouffoue +3 more
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The Capacitively Coupled Chopper Stabilized Amplifier with a DTPA based Demodulator
2018 IEEE International Symposium on Circuits and Systems (ISCAS), 2018This paper presents a chopper stabilized amplifier with a discrete time parametric amplifier (DTPA) based signal demodulator. The DTPA demodulator enables signal amplification while down converting the chopped signal to baseband frequency. The low frequency noise and chopping ripples are cancelled during the track-and-hold process involved in the ...
Ashish Joshi +2 more
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Design and Implementation of chopper-stabilized amplifiers
2010One observation from the two neural amplifiers described in the previous two chapters is the dominance of flicker noise. Most of the existing power-noise optimization techniques target thermal noise. However, flicker noise is a significant concern for EMG/EEG/ECoG applications, where the bandwidth of interest is much lower (
Jeremy Holleman, Fan Zhang, Brian Otis
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Chopper stabilized sub 1V reference voltage in 65nm CMOS
2015 IEEE 58th International Midwest Symposium on Circuits and Systems (MWSCAS), 2015A sub 1V reference circuit is proposed, that exploits the CTAT and PTAT voltages in the beta multiplier circuit to attain a stable voltage with temperature and power supply. A one-time calibration is integrated in the architecture to get a good performance over process. Further, chopper stabilization is proposed in the circuit itself rather than in the
Rakesh Kumar Palani +2 more
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Enhanced IIP2 Chopper Stabilized Direct Conversion Mixer Architecture
2019 32nd International Conference on VLSI Design and 2019 18th International Conference on Embedded Systems (VLSID), 2019This paper presents an improved Second Order Input Intercept Point (IIP2) Direct Conversion Mixer architecture by introducing chopping in the standard active double balanced mixer. The mixing frequency required is half of the RF frequency. This technique improves the second order linearity of the mixer. There is only one active mixer in the signal path
Rohit Rothe, Rajesh Zele
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Design of novel chopper stabilized rail-to-rail operational amplifier
2015 IEEE 11th International Conference on ASIC (ASICON), 2015A chip design of novel chopper stabilized operational amplifier was presented, chopper-wave modulation and demodulation was used in this architecture, and its 1/f noise was decreased largely. To extend input common mode voltage range, a novel rail-to-rail differential amplifier was adapted in the input stage.
Yong Xu +3 more
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