Patent ID: 6828868
Filing Date: 2004-12-07
Classification: H03B,H03J

Abstract:
A semiconductor device comprising:a first transistor having a control electrode and having one end and the other end of a current path thereof; a second transistor having a control electrode and having one end and the other end of a current path thereof, the control electrode of the second transistor is coupled to one end of the current path of the first transistor and one end of the current path of the second transistor is coupled to the control electrode of the first transistor; a constant current source coupled to the other end of the current path of the first transistor and the other end of the current path of the second transistor; a current mirror circuit that supplies a current to one end of the current path of the first transistor and one end of the current path of the second transistor; an inductor coupled to one end of the current path of the first transistor and one end of the current path of the second transistor; a first capacitor coupled to one end of the current path of the first transistor and one end of the current path of the second transistor; and a second capacitor and a switch element coupled to one end of the current path of the first transistor and one end of the current path of the second transistor.