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. 17, 2004
Filed:
Dec. 16, 2002
Dale M. Terrien, Yorba Linda, CA (US);
ADC DSL Systems, Inc., Eden Prairie, MN (US);
Abstract
Power control circuits that control the power sequencing and ramp rate of voltages applied to integrated circuits are disclosed. In one embodiment, a power control circuit comprises a delay resistor, a delay capacitor and an input transistor. The delay resistor is adapted to be coupled to an input power supply. The delay capacitor is coupled in series with the delay resistor. The input transistor has an emitter that is adapted to be coupled to the input power supply through the delay resister. The input transistor conducts current when a voltage across the delay capacitor rises above a selected voltage threshold of the input transistor. A power source is applied to a load in response to the conduction of the input transistor which is delayed by the time it takes to charge the delay capacitor to the selected voltage threshold.