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:
May. 25, 1976
Filed:
Mar. 27, 1975
Walter Richard Davis, Tempe, AZ (US);
Tim Warren Henry, Tempe, AZ (US);
Motorola, Inc., Chicago, IL (US);
Abstract
A current limit circuit is disclosed for sensing the current drain of a load connected in series therewith. Under normal operating conditions the circuit presents a relatively low impedance in series with the load. Circuit overload protection is provided if the current increases above a predetermined value by a current limiting circuit provided for limiting the current conducted therethrough. In response to the current limiting condition, thermal shutdown of the circuit occurs to reduce the current that is supplied to the load to a predetermined minimum value i.e., the current limit circuit presents an impedance to the load which is relatively much greater than the impedance of the current limit circuit during normal operating conditions. After a predetermined time, the current limit circuit is again rendered operative and if the circuit overload condition is still present the aforedescribed cycle is repeated until the fault condition is corrected.