Patent ID: 6586975
Filing Date: 2003-07-01
Classification: G05F,H03K

Abstract:
A semiconductor device comprising:a first node which is provided a first voltage; a second node which is provided a second voltage, wherein said second voltage is lower than said first voltage; a first current mirror circuit which has an input terminal and an output terminal, wherein said first current mirror circuit is coupled with said first node; a second current mirror circuit which has an input terminal and an output terminal, wherein said input terminal of said second current mirror circuit is coupled with said output terminal of said first current mirror circuit, wherein said output terminal of said second current mirror circuit is coupled with said input terminal of said first current mirror circuit and wherein said second current mirror circuit is coupled with said second node; and a start-up circuit which includes a third node, an inverter which is connected to said third node, a first switch which connects said first node and said input terminal of said second current mirror circuit based on voltage on said third node, a first transistor to which is located between the first and third nodes, and which supplies a current at the first node to the third node based on a voltage on the input terminal of the first current mirror circuit, and a second switch which connects said first node and said third node based on an inverted voltage of the voltage on said third node.