Title :
A high-PSR low-power voltage regulating circuit for wireless capsule endoscopy
Author :
Ding, Qiyuan ; Feng, Liang ; Hou, Peng ; Jia, Mengjun ; Cheng, Yuhua
Author_Institution :
Shanghai Res. Inst. of Microelectron. (SHRIME), Peking Univ., Beijing, China
Abstract :
In this paper, we present the design of a low-power, high power supply rejection (PSR) voltage regulating circuit in a 0.35μm standard CMOS process. A CMOS full-wave bridge rectifier is designed to generate an unregulated DC voltage. A low dropout (LDO) series voltage regulator converts the unregulated voltage to a stable and clean DC supply voltage. A self-biased wide range and high power supply rejection ratio (PSRR) VGS voltage reference is introduced. Simulation results show that the proposed circuit provides 3V regulated DC output, exhibits load regulation factor of as low as 1% when delivering up to 30mA load current, and demonstrates line regulation factor of as low as 0.01%/V over 4.8V input amplitude variation.
Keywords :
CMOS integrated circuits; biomedical electronics; bridge circuits; endoscopes; patient diagnosis; rectifying circuits; voltage regulators; CMOS full wave bridge rectifier; CMOS process; high PSR low power voltage regulating circuit; high power supply rejection; input amplitude variation; size 0.35 mum; voltage 3.5 V; wireless capsule endoscopy; Bridge circuits; CMOS integrated circuits; MOSFETs; Power supplies; Rectifiers; Regulators; Voltage control;
Conference_Titel :
Solid-State and Integrated Circuit Technology (ICSICT), 2010 10th IEEE International Conference on
Conference_Location :
Shanghai
Print_ISBN :
978-1-4244-5797-7
DOI :
10.1109/ICSICT.2010.5667320
