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:
Nov. 17, 1992
Filed:
Aug. 29, 1991
Warren Schultz, Tempe, AZ (US);
Stephen Su, Mesa, AZ (US);
Other;
Abstract
A low impedance load is switched between a power supply source and ground through a series connected power MOSFET the conduction of which is controlled by a switching circuit. The switching circuit includes a linear loop that regulates the switch voltage to a minimum value to produce current flow through the load and the MOSFET. In addition, the switching circuit includes a current supply placed in parallel to the MOSFET which is set to supply a minimum predetermined current that is representative of the value of current flow through the load under an open load condition. If the load current falls below this set current value an open load status flag is provided by the switching circuit as the loop is no longer in regulation.