A VCO-Based ADC with Relaxation Oscillator for Biomedical Applications
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A4 Artikkeli konferenssijulkaisussa
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Date
2018
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Language
en
Pages
4
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2018 IEEE International Conference on Electronics Circuits and Systems, pp. 861 - 864
Abstract
This paper describes a voltage controlled oscillator(VCO) -based ADC for biomedical applications which employs a relaxation oscillator for voltage-to-frequency conversion. The proposed circuit uses a redundant pair of capacitors to mitigate the conversion error resulting from the time required for resetting the capacitor. A switch matrix with feedback helps sustain oscillations. Further, the VCO frequency approaches zero as the input voltage approaches zero unlike a converter with ring oscillator, thereby reducing power consumption. Post-layout simulation of the proposed ADC designed with a 28 nm FDSOI CMOS technology shows an ENOB of 8 and power consumption of 12 uW from a 0.7 V supply.Description
Keywords
VCO, ADC, relaxation oscillator, voltage-to-frequency, biomedical applications
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Citation
Olabode, O, Ontronen, A, Unnikrishnan, V, Kosunen, M & Ryynänen, J 2018, A VCO-Based ADC with Relaxation Oscillator for Biomedical Applications . in 2018 IEEE International Conference on Electronics Circuits and Systems . IEEE, pp. 861 - 864, IEEE International Conference on Electronics Circuits and Systems, Bordeaux, France, 09/12/2018 . https://doi.org/10.1109/ICECS.2018.8617935