The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 03, 1989
Filed:
Aug. 03, 1987
Charles D Hechtman, Hopewell, NJ (US);
Ilyoung Kim, Holland, PA (US);
American Telephone and Telegraph Company, New York, NY (US);
Abstract
A driver circuit for alternately sourcing current to, and sinking current from a load (12) comprises a pair of field effect transistors (20 and 22), each having its drain-to-source portion coupled between the load and a separate one of a pair of voltage sources (V.sub.H and V.sub.L) which serve to source and sink current, respectively. Each of a second pair of field effect transistors (24 and 26) has its drain-to-source portion coupled between the gate of a separate one of the first pair of field effect transistors and a current source (28). The gate of each of the field effect transistors of the second pair is supplied with a separate one of a pair of electrical signals V.sub.i ' and V.sub.i '* which alternately shift in amplitude. The control signals V.sub.i ' and V.sub.i '* render the field effect transistors of the second pair alternately nonconductive, thereby rendering the first pair of field effect transistors (20 and 22) alternately conductive to sink and source current, respectively.