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. 27, 2001
Filed:
Feb. 23, 2000
Michael K. Scruggs, Pompton Plains, NJ (US);
Serdar T. Sozusen, Pinebrook, NJ (US);
Honeywell International Inc., Morristown, NJ (US);
Abstract
A current regulator for a laser tube used in a ring laser gyroscope includes a ballast resistor coupled to the laser tube's anode, an output for the current, such as a current sensing resistor, a current source coupled between the ballast resistor and the output, a control circuit that establishes the amount of current flow through the current regulator, and a voltage divider that senses the voltage across the current source. The current source includes two transistors coupled in series and the voltage divider generates a voltage level that is half the sensed voltage differential and supplies the generated voltage level to one of the transistors so as to control the voltage drop across that transistor to be the same as the voltage drop across the other transistor. The current source may include more than two transistors in series and the voltage drops across the transistors are controlled to be the same.