|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||327/525; 327/526; 365/225.7|
|발명자 / 주소|
|출원인 / 주소|
|대리인 / 주소||
|인용정보||피인용 횟수 : 10 인용 특허 : 5|
A trimming locking circuit is provided for IC using a programmable fuse array for after-assembly trimming procedures. In one embodiment, a trimming locking circuit is provided for a single power supply input into the programmable fuse array. In another embodiment, a trimming locking circuit is provided to operate with two or more power supply inputs. The trimming locking circuit electrically isolates the programmable fuse array from over voltage conditions on the power supplies.
1. A trimming locking circuit for a an integrated circuit with a programmable fuse array, comprising:a metal fuse and a supply resistor coupled in parallel, and coupled between a second power supply and a programmable fuse array supply line; a blocking diode coupled in reverse bias between said metal fuse and said supply resistor and a first power supply; wherein said metal fuse, said supply resistor and said diode are adapted to electrically isolate a load from over voltage conditions present on said second power supply. 2. A trimming locking circuit as...