A Consideration of Temperature Coefficient on Gate-Voltage-Controlled PTAT Voltage Generator under Ultra Low Power Supply

Abstract

A way of large temperature coefficient on PTAT voltage generator is proposed. By stacking the proposed circuits, a PTAT voltage generator with large temperature coefficient can be realized. The PTAT voltage generator is analyzed by use of 4-terminal MOSFET model in subthreshold region based on the diffusion current. The temperature coefficient of measured value is compared with that of theoretical value.

CMOS Temperature Sensor with Programmable Temperature Range for Biomedical Applications

“…A low power and low voltage temperature sensor has been proposed and reported [7], [8]. This sensor in general achieves low power consumption, but it has small sensitivity.…”

“…This means that cost of fabrication will increase. The last problem is that many cores of temperature sensor circuits use external bias circuits or high value resistor [8], [9], [13]. These require large chip areas.…”