TY - GEN
T1 - An Amp-Less Time-Domain AC Bridge for Impedance Spectroscopy with 1-bit \DeltaSigma DAC
AU - Maekawa, Yuya
AU - Ishikuro, Hiroki
N1 - Publisher Copyright:
© 2021 IEEE.
PY - 2021
Y1 - 2021
N2 - This paper proposes a time-domain AC bridge for impedance spectroscopy. In the proposed system, the AC signal source consists of switches and a digitalDelta\Sigma modulator, and an oscillator and a counter are used to detect the voltage error for least-mean-square algorithm for auto-balancing. Due to the noise shaping of theDelta\Sigma DAC and the low-pass filter characteristics of the VCO, it is possible to read the impedance without an amplifier. The developed prototype of the proposed system achieved precise complex-impedance measurement from 50 Hz to 10 kHz input signal within 0.33% accuracy.
AB - This paper proposes a time-domain AC bridge for impedance spectroscopy. In the proposed system, the AC signal source consists of switches and a digitalDelta\Sigma modulator, and an oscillator and a counter are used to detect the voltage error for least-mean-square algorithm for auto-balancing. Due to the noise shaping of theDelta\Sigma DAC and the low-pass filter characteristics of the VCO, it is possible to read the impedance without an amplifier. The developed prototype of the proposed system achieved precise complex-impedance measurement from 50 Hz to 10 kHz input signal within 0.33% accuracy.
KW - AC bridge
KW - \Delta\Sigma modulation
KW - impedance spectroscopy
KW - time-domain
UR - http://www.scopus.com/inward/record.url?scp=85124607200&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85124607200&partnerID=8YFLogxK
U2 - 10.1109/ICECS53924.2021.9665536
DO - 10.1109/ICECS53924.2021.9665536
M3 - Conference contribution
AN - SCOPUS:85124607200
T3 - 2021 28th IEEE International Conference on Electronics, Circuits, and Systems, ICECS 2021 - Proceedings
BT - 2021 28th IEEE International Conference on Electronics, Circuits, and Systems, ICECS 2021 - Proceedings
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 28th IEEE International Conference on Electronics, Circuits, and Systems, ICECS 2021
Y2 - 28 November 2021 through 1 December 2021
ER -