Title :
A 1-V, self adjusting, 5-MHz CMOS RC-oscillator
Author :
Lasanen, Kimmo ; Räisänen-Ruotsalainen, Elvi ; Kostamovaara, J.
Author_Institution :
Dept. of Electr. Eng. & Infotech Oulu, Oulu Univ., Finland
Abstract :
A 5-MHz, self adjusting CMOS RC-oscillator for portable biomedical applications is presented. The oscillator is capable of operating. with a 1-V power supply and it features low current consumption (20 μA @ 1 V) and low sensitivity to supply voltage and temperature variations. The total accuracy of the oscillator is within 5 % with component tolerances of 1 % in external elements R and C. The design was fabricated in a 0.35 μm n-well standard digital CMOS process with threshold voltages of 0.5 V and -0.65 V. The design and the operation of the RC-oscillator with measurement results of fabricated chips are presented.
Keywords :
CMOS analogue integrated circuits; RC circuits; biomedical electronics; integrated circuit design; low-power electronics; voltage-controlled oscillators; -0.65 V; 0.35 micron; 0.5 V; 1 V; 1-V power supply operation; 20 muA; 5 MHz; 5-MHz self-adjusting CMOS RC-oscillator; RC-oscillator design; RC-oscillator operation; VCO; component tolerances; low current consumption; low supply voltage variation sensitivity; low temperature variation sensitivity; n-well standard digital CMOS process; portable biomedical applications; threshold voltages; total accuracy; Biomedical measurements; CMOS process; Capacitors; Feedback circuits; Frequency; Logic circuits; Power supplies; Temperature sensors; Voltage control; Voltage-controlled oscillators;
Conference_Titel :
Circuits and Systems, 2002. ISCAS 2002. IEEE International Symposium on
Print_ISBN :
0-7803-7448-7
DOI :
10.1109/ISCAS.2002.1010469
