A 6.5/11/17.5/30-GHz high throughput interferometer-based reactance sensors using injection-locked oscillators and ping-pong nested chopping

Author

Chien Jun-Chau ; Anwar, Mohd ; Yeh Erh-Chia ; Lee, L.P. ; Niknejad, Ali M.

Author_Institution

Univ. of California, Berkeley, Berkeley, CA, USA

fYear

2014

fDate

10-13 June 2014

Firstpage

1

Lastpage

2

Abstract

A series of high-sensitivity reactance sensors at 6.5/11/17.5/30-GHz is demonstrated for dielectric spectroscopy sensing on a single micron-size biological specimen. SNR is enhanced with the combination of interferometry and injection-locked oscillator sensors while the offset incurred by chopping-ripple is reduced through ping-pong nested chopping. The sensors achieve a sensitivity of less than 1.25 aF at 100-kHz, enabling label-free cellular detection as a new analytical tool.

Keywords

biological techniques; capacitive sensors; cellular biophysics; injection locked oscillators; light interferometers; microwave oscillators; dielectric spectroscopy sensing; frequency 100 kHz; frequency 6.5 GHz to 30 GHz; high throughput interferometer-based reactance sensors; high-sensitivity reactance sensors; injection-locked oscillators; label-free cellular detection; ping-pong nested chopping; single micron-size biological specimen; Abstracts; CMOS integrated circuits; CMOS technology; Detectors; Frequency modulation; Time-frequency analysis;

fLanguage

English

Publisher

ieee

Conference_Titel

VLSI Circuits Digest of Technical Papers, 2014 Symposium on

Conference_Location

Honolulu, HI

Print_ISBN

978-1-4799-3327-3

Type

conf

DOI

10.1109/VLSIC.2014.6858408

Filename

6858408