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:
Jul. 06, 2010
Filed:
Sep. 19, 2007
Applicant:
Charles W. Ragsdale, Concord, CA (US);
Inventor:
Charles W. Ragsdale, Concord, CA (US);
Assignee:
Bio-Rad Laboratories, Inc., Hercules, CA (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02J 7/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
Systems, methods, apparatus, and circuits for controlling an electrical signal transmitted to a sample load are provided. The electrical signal produced by a capacitor is controlled via a control signal sent to a variable resistance device that is connected in parallel with the sample load. The variable resistance device includes a resistance and a switch in series. The control signal opens and closes the switch, thus providing a variable resistance based on the amount of time the switch is closed.