A 900 mV 25 μW high PSRR CMOS voltage reference dedicated to implantable micro-devices

Author

Hu, Yamu ; Sawan, Mohamad

Author_Institution

Dept. of Electr. Eng., Ecole Polytech. de Montreal, Que., Canada

Volume

1

fYear

2003

fDate

25-28 May 2003

Abstract

In this paper, we describe an ultra low-voltage high PSRR bandgap voltage reference circuit dedicated to implantable biomedical applications. The circuit takes advantage of the low gate-source voltage of weak inversion CMOS transistor. And by using negative feedback to generate a regulated supply, the power supply rejection ratio (PSRR) of the proposed circuit can be increased up to 82 dB at 10 KHz. Although the circuit is designed for working under 900 mV supply voltage, the preliminary simulation result shows that it is able to work as low as 600 mV. The temperature coefficient is around 80 ppm/°C, while the circuit consumes 25 μW of power.

Keywords

CMOS integrated circuits; biomedical electronics; circuit feedback; low-power electronics; prosthetics; reference circuits; 10 kHz; 25 muW; 900 mV; CMOS transistor; implantable biomedical micro-device; negative feedback; power supply rejection ratio; temperature coefficient; ultra-low-voltage bandgap voltage reference circuit; Batteries; CMOS technology; Circuit simulation; Low voltage; Photonic band gap; Power supplies; Power system modeling; Regulators; Skin; Temperature dependence;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 2003. ISCAS '03. Proceedings of the 2003 International Symposium on

Print_ISBN

0-7803-7761-3

Type

conf

DOI

10.1109/ISCAS.2003.1205578

Filename

1205578