Patent ID: 8363046
Filing Date: 2013-01-29
Classification: G05F,G09G

Abstract:
1. A reference voltage generator comprising: an output terminal; a load circuit connected between the output terminal and a ground voltage terminal; an output transistor connected between the output terminal and a power supply voltage terminal; a first constant current source connected between the output terminal and the power supply voltage terminal; a first switch circuit that selectively connects the output terminal with one of the output transistor and the first constant current source; a control circuit that controls a band-gap current to be supplied to the load circuit; a second switch circuit that selectively connects the third node with one of a control terminal of the output transistor and the first constant current source; and a second constant current source connected with the control terminal of the output transistor, wherein wherein wherein the second switch circuit connects the third node with the control terminal of the output transistor in the first state, and connects the third node with the first constant current source in the second state.