Title :
Low-power current-mode logarithmic pipeline analog-to-digital converter for ISFET based pH sensor
Author :
Sirimasakul, S. ; Thanachayanont, A. ; Jeamsaksiri, W.
Author_Institution :
Fac. of Eng., King Mongkut´´s Inst. of Technol. Ladkrabang, Bangkok, Thailand
Abstract :
This paper describes the design and realization of a low power current-mode logarithmic pipeline analog-to-digital converter in 0.35 mum CMOS technology. The ADC is intended for conversion of sub-microampere analog output current of an ISFET based pH sensor. Subthreshold MOSFETs and the translinear principle are exploited to achieve simple and low-power ADC realization. The ADC was simulated with a 1-V power supply voltage and dissipated 3.3 muW static power at 1-kHz clock frequency.
Keywords :
CMOS integrated circuits; analogue-digital conversion; chemical sensors; current-mode circuits; ion sensitive field effect transistors; low-power electronics; pH measurement; CMOS technology; ISFET based pH sensor; clock frequency; frequency 1 Hz; low-power current-mode logarithmic pipeline analog-to-digital converter; power 3.3 muW; power supply voltage; size 0.35 mum; subthreshold MOSFET; translinear principle; voltage 1 V; Analog-digital conversion; Biosensors; CMOS technology; Circuits; Design engineering; MOSFETs; Microelectronics; Pipelines; Power engineering computing; Sensor phenomena and characterization; analog-to-digital converter; logarithmic; low power; pipeline; weak inversion;
Conference_Titel :
Communications and Information Technology, 2009. ISCIT 2009. 9th International Symposium on
Conference_Location :
Icheon
Print_ISBN :
978-1-4244-4521-9
Electronic_ISBN :
978-1-4244-4522-6
DOI :
10.1109/ISCIT.2009.5341061
