Searched for: subject%3A%22delta%255C-sigma%255C+ADC%22
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Tang, Z. (author), Brito Zamparette, R.L. (author), Furuta, Yoshikazu (author), Nezuka, Tomohiro (author), Makinwa, K.A.A. (author)
This article presents a versatile shunt-based current sensor for battery management applications. It digitizes the current-induced voltage drop across an external shunt resistor with the help of a 2 nd -order delta-sigma ( ΔΣ ) ADC, whose summing node is implemented as a low-noise capacitively coupled amplifier. To compensate for the shunt’s...
journal article 2022
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Mehrotra, Shubham (author), Eland, Efraim (author), Karmakar, S. (author), Liu, Angqi (author), Gonen, B. (author), Bolatkale, M. (author), Van Veldhoven, Robert (author), Makinwa, K.A.A. (author)
This paper presents a continuous-Time zoom ADC for audio applications. It combines a 4-bit noise-shaping coarse SAR ADC and a fine delta-sigma modulator with a tail-resistor linearized OTA for improved linearity, energy efficiency, and handling of out-of-band interferers compared to previous designs. In 160 nm CMOS, the prototype chip...
conference paper 2022
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Eland, E.N. (author), Karmakar, S. (author), Gonen, B. (author), van Veldhoven, Robert (author), Makinwa, K.A.A. (author)
This article describes a discrete-time zoom analog-to-digital converter (ADC) intended for audio applications. It uses a coarse 5-bit SAR ADC in tandem with a fine third-order delta-sigma modulator (ΔΣM) to efficiently obtain a high dynamic range. To minimize its over-sampling ratio (OSR) and, thus, its digital power consumption, the...
journal article 2021
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Xie, S. (author), Theuwissen, A.J.P.A.M. (author)
This paper presents a CMOS image sensor (CIS) with a zoom ADC, to quantize in-pixel temperature sensors, as well as for faster readout speed of the image pixels while maintaining low quantization noise. The proposed 15 bit zoom ADC has a 4 bit Unit Capacitor Array (UCA) SAR and a 13 bit incremental 2<sup>nd</sup>-order delta-sigma ADC (DSADC)...
journal article 2020
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Gonen, B. (author), Karmakar, S. (author), van Veldhoven, Robert (author), Makinwa, K.A.A. (author)
This article presents a continuous-Time zoom analog to digital converter (ADC) for audio applications. It employs a high-speed asynchronous SAR ADC that dynamically updates the references of a continuous-Time delta-sigma modulator (CTDSM). Compared to previous switched-capacitor (SC) zoom ADCs, its input impedance is essentially resistive,...
journal article 2020
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Xie, S. (author), Theuwissen, A.J.P.A.M. (author)
This paper presents methodologies for suppressing the spatial and the temporal noise in a CMOS image sensor (CIS). First of all, it demonstrates by using a longer-length column bias transistor, both the fixed pattern noise (FPN) and temporal noise can be suppressed. Meantime, it employs column-level oversampling delta-sigma ADCs to suppress...
journal article 2019
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Karmakar, S. (author), Gonen, B. (author), Sebastiano, F. (author), van Veldhoven, Robert (author), Makinwa, K.A.A. (author)
This paper presents a dynamic zoom analog-to-digital converter for use in low-bandwidth (&amp;lt;1 kHz) instrumentation applications. It employs a high-speed asynchronous successive approximation register (SAR) ADC that dynamically updates the references of a fully differential &amp;#x0394; &amp;#x03A3; ADC. Compared to previous zoom ADCs,...
journal article 2018
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Rout, S. (author)
With the bandwidth of the ECG signal extending from sub-Hz to 200 Hz, a major challenge for an ECG readout system lies in implementing the high-pass (HP) cut-off frequency as this translates into the realization of large time constants on-chip.Although techniques such as those based on the use of pseudo-resistors to obtain very large time...
master thesis 2016
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Chae, Y. (author), Souri, K. (author), Makinwa, K.A.A. (author)
A 20-bit incremental ADC for battery-powered sensor applications is presented. It is based on an energy-efficient zoom ADC architecture, which employs a coarse 6-bit SAR conversion followed by a fine 15-bit ΔΣ conversion. To further improve its energy efficiency, the ADC employs integrators based on cascoded dynamic inverters for extra gain and...
journal article 2013
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Chen, C. (author)
master thesis 2012
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Wu, R. (author), Chae, Y. (author), Huijsing, J.H. (author), Makinwa, K.A.A. (author)
This paper presents a 20-b read-out IC with ±40-mV full-scale range that is intended for use with bridge transducers. It consists of a current-feedback instrumentation amplifier (CFIA) followed by a switched-capacitor incremental ΔΣ ADC. The CFIA's offset and 1/ <i>f</i> noise are mitigated by chopping, while its gain accuracy and gain drift are...
journal article 2012
Searched for: subject%3A%22delta%255C-sigma%255C+ADC%22
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