Title :
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
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;
Conference_Titel :
Circuits and Systems, 2003. ISCAS '03. Proceedings of the 2003 International Symposium on
Print_ISBN :
0-7803-7761-3
DOI :
10.1109/ISCAS.2003.1205578
