Patent ID: 6822296
Filing Date: 2004-11-23
Classification: H02J

Abstract:
A complementary metal oxide semiconductor structure suitable for use in a battery protection circuit, comprising:a P-type substrate, having a P-well and an N-well adjacent to each other, wherein the P-well has an N-type buried layer isolated from the P-type substrate; an N-type metal oxide semiconductor transistor formed in the P-well and a P-well formed in the N-well, wherein the N-type metal oxide semiconductor transistor has a gate coupled to an input terminal, a source coupled to a first voltage, and a drain coupled to an output terminal, the P-type metal oxide semiconductor transistor has a gate coupled to the input terminal, the source coupled to a second voltage, and a drain coupled to the output terminal, the first voltage is lower than the second voltage, wherein the input terminal and output terminal are respectively coupled to a first monitored voltage and a second monitored voltage in the battery protection circuit for monitoring and protecting within a voltage range.