Patent ID: 7394635
Filing Date: 2008-07-01
Classification: G01R,H02J

Abstract:
1. A current detection circuit comprising: a current/voltage converting element for generating a voltage in accordance with an input current; a reference voltage generation circuit for generating a reference voltage, the reference voltage generation circuit having an element configuration for setting a predetermined temperature characteristic to the reference voltage; and a comparator for outputting an output signal in accordance with a magnitude relation between a voltage converted in the current/voltage converting element and the reference voltage generated in the reference voltage generation circuit; wherein the element configuration of the reference voltage generation circuit includes a first transistor having a first channel area and a second transistor having a second channel area, the first channel area and the second channel area has a ratio determining the reference voltage, wherein the element configuration of the reference voltage generation circuit further includes first and second resistances connected in series, wherein the reference voltage is output from a junction point between the first and second resistances, wherein the ratio enables the temperature characteristic of the reference voltage output from the junction point to offset the temperature characteristic of the voltage output from the current/voltage converting element.