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:
Apr. 05, 1994
Filed:
Apr. 03, 1992
Applicant:
Inventors:
John W Simmons, Tamarac, FL (US);
Virgilio A Fernandez, Sunrise, FL (US);
Norman T Rollins, Plantation, FL (US);
Assignee:
Motorola, Inc., Schaumburg, IL (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04B / ;
U.S. Cl.
CPC ...
455 79 ; 455 83 ;
Abstract
A circuit (100) is provided which includes a forward charging switch (FET MN2) having an input terminal (102), an output terminal 112 and a plurality of current sink elements (FETs MN1 and MN3). The plurality of current sink elements (MN1 and MN3) are selectable via a control switch circuit (114) which is responsive to a control signal at the control switch input terminal (104). Preferably, one of the current sinks is always selected in order for some small amount of current to be discharged from output terminal 112 which is coupled to a capacitor (C1).