FAST CMOS MATCHED IMPEDANCE TYPE DC WRITE CURRENT DRIVER FOR PREAMPLIFIER

摘要

PROBLEM TO BE SOLVED: To provide a current driver in which a limitation on a speed, safe operating area problem and a wasted current during overshoot problem are improved. SOLUTION: A driver circuit includes a CMOS stage and switch functionalities for performing certain tasks. One task is to selectively block an exposure of the CMOS stage to a reference voltage. Another task is to selectively protect the CMOS stage during a transient operation. Yet another task is to block a leakage current flowing from the CMOS stage to a ground. COPYRIGHT: (C)2005,JPO&NCIPI