Circuit for voltage detection and protection and operating method thereof

摘要

A circuit for voltage detection and protection comprises a first block, a first voltage detector, a second block and a second voltage detector. The first block receives a first voltage supply. The first voltage detector detects the first voltage supply and generates a first detecting signal when detecting the first voltage supply level is out of the first operating voltage range. The second block receives a second voltage supply. The second voltage detector detects the second voltage supply and generates a second detecting signal when detecting the second voltage supply level is out of the second operating voltage range. The first block performs a protection operation on the circuit when monitoring at least one of the first and second detecting signals.

主权项

1. A circuit for voltage detection and protection, comprising:
a first block for receiving a first voltage supply, wherein the first block has a first operating voltage range; a first voltage detector for detecting the first voltage supply and generating a first detecting signal when detecting the voltage level of the first voltage supply is out of the first operating voltage range; a second block for receiving a second voltage supply, wherein the second block has a second operating voltage range; and a second voltage detector for detecting the second voltage supply and generating a second detecting signal when detecting the voltage level of the second voltage supply is out of the second operating voltage range; wherein the first block performs a protection operation on the circuit in response to at least one of the first and second detecting signals; wherein the first block comprises: a sub-control block having a third operating voltage range lower than the first operating voltage range; wherein the sub-control block performs the protection operation on the circuit when the voltage level of the first voltage supply is out of the first operating voltage range but within the third operating voltage range.