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:
Feb. 08, 2000
Filed:
Dec. 16, 1998
Otto R Buhler, Boulder, CO (US);
Storage Technology Corporation, Louisville, CO (US);
Abstract
Low voltage switched loads, such as magnetic tape write drivers, require a power source with a regulated voltage. A voltage regulator circuit includes a switched voltage regulator having an unregulated voltage input connected to an unregulated voltage source and an enabling input. The voltage regulator produces a regulated voltage at an output when the enabling input is asserted and produces high impedance at the output when the enabling input is unasserted. A capacitor is connected between the regulated voltage output and common voltage. A controlled precharge switch in series with a precharge resistor is connected between the unregulated source and the regulated voltage output. The precharge switch has a precharging input which closes the precharge switch when the precharging input is asserted. The circuit also includes a control logic operative to unassert the enabling input, assert the precharging input to close the precharging switch, unassert the precharging input after sufficient time to charge the capacitor to a voltage substantially the same as the regulated voltage, and assert the enabling input.