Patent ID: 7379039

Claim:
A current drive circuit for supplying a drive current to a driven object, including: a control line, a signal line to which a signal current having a current level in accordance with information is supplied, a receiving part for fetching the signal current from the signal line when the control line selected, a converting part for converting a current level of the fetched signal current to a voltage level and holding the same, and a drive part for converting the held voltage signal to a current signal and outputting the drive current, wherein the receiving part includes a fetch use insulating gate type field effect transistor having a control terminal, a first terminal, and a second terminal, the first terminal connected to a first terminal of the conversion use transistor the second terminal connected to the signal line, and the control terminal connected to the control line, and the converting part includes a switch use transistor inserted between the first terminal and control terminal of the conversion use transistor.