A high resolution capacitance deviation-to-digital converter utilizing time stretching

Author

Kim, Manho ; Xing, Nan ; Shin, Dong-Yong ; Lee, Hyunjoong ; Kim, Suhwan

Author_Institution

Electr. Eng. & Inter-Univ. Semicond. Res. Center, Seoul Nat. Univ., Seoul, South Korea

fYear

2009

fDate

9-11 Sept. 2009

Firstpage

83

Lastpage

86

Abstract

We present a capacitance deviation-to-digital converter (CDC) for the thin membrane transducers (TMT) used for bio-molecular detection. Our CDC consists of a capacitance deviation-to-time converter (CTC), time-stretchers, and a time-to-digital converter (TDC). The time-stretchers are innovatively adopted to achieve higher resolution of the CDC with expanse of moderate power consumption. Designed and simulated in 0.35 um CMOS bulk technology, the CDC has a resolution of 370aF with a maximum error of 0.027⁰/₀₀, at a rate of 700 samples per second.

Keywords

capacitance; capacitive sensors; delays; medical signal detection; membranes; molecular biophysics; CDC; biomolecular detection; high resolution capacitance deviation-to-digital converter; thin membrane transducers; time stretching; time-stretchers; time-to-digital converter; Biomembranes; CMOS technology; Capacitance; Capacitive sensors; Capacitors; Circuits; Energy consumption; Frequency; Transducers; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

SOC Conference, 2009. SOCC 2009. IEEE International

Conference_Location

Belfast

Print_ISBN

978-1-4244-4940-8

Electronic_ISBN

978-1-4244-4941-5

Type

conf

DOI

10.1109/SOCCON.2009.5398089

Filename

5398089