A Microprocessor Supervisory Circuit with High Efficiency and Low Power Consumption

• Published in: Journal of the Institution of Engineers (India). Series B, Electrical Engineering, Electronics and telecommunication engineering, Computer engineering Vol. 102; no. 4; pp. 617 - 627
• Main Authors: Huang, Shuyan, Zhang, Hao, Xie, Yumei, Huang, Youping
• Format: Journal Article
• Language: English
• Published: New Delhi Springer India 01.08.2021; Springer Nature B.V
• Subjects: Circuits; CMOS; Communications Engineering; Efficiency; Engineering; Microprocessors; Networks; Original Contribution; Power consumption; Threshold voltage; Microprocessor supervisory circuit; Reference voltage circuit; Source follower; High efficiency; Low power consumption
• ISSN: 2250-2106; 2250-2114
• DOI: 10.1007/s40031-021-00542-4

A microprocessor supervisory circuit with high efficiency and low power consumption is proposed and implemented using a mixed 0.35-μm CMOS process. With a novel reference voltage circuit and an additional voltage detection circuit, the precision of the threshold voltage and the efficiency of the reset signal are improved. With a turn-off control circuit, the current supply is reduced. As the simulation and experiment on ten package samples shown, the threshold voltage is about 2.91 V with the precision of 5.97%. In the power voltage range of 3 V to 6 V, the reset time is 235.5 ms with the precision of 4.1%, the supply current is about 10 μA, and the chip area is 510 μm × 560 μm. Thus, the proposed microprocessor supervisory circuit is superior performance in precision of the threshold voltage, the efficiency of reset time and low supply current.