Design an Integrated Microprocessor Supervisory Chip for monitoring power failure

摘要

Supervisory Circuits are designed for various type of application. It comes as discrete devices as well as On-Chip solutions and is indispensable to initialize some critical nodes of Analog and Digital designs during Power failure. In this paper, we present an Integrated Microprocessor Supervisory Chip specifically designed for Microprocessor peripheral devices. The new design chip provides three main features namely battery switch over, watch-dog and power on reset. The Integrated Microprocessor Supervisor is outfit for On-Chip applications and also fully digital. Few aspects are analysed such as Area-efficiency, Power-efficiency, Supply Rise-time insensitivity and Ambient Temperature insensitivity. The circuit is implemented within a small area (990 µm × 980 µm) using the 3.0 V tolerant MOSFETs of a 0.18 µm CMOS technology. It has a maximum quiescent current consumption of 4F and works over infinite range of Supply rise-times.