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:
Sep. 15, 2009
Filed:
Apr. 01, 2005
John Bui, Milpitas, CA (US);
John Bui, Milpitas, CA (US);
Altera Corporation, San Jose, CA (US);
Abstract
Voltage regulator circuitry is provided. The voltage regulator circuitry is suitable for powering core logic on a programmable logic device. The voltage regulator circuitry receives an external power supply voltage and reduces the external power supply voltage to a core power supply voltage if needed. If the external power supply voltage is at the same level needed to power the core logic, the voltage regulator circuitry passes the power supply voltage to the core logic. The voltage regulator circuitry monitors the core power supply voltage using a feedback path. Overshoot and undershoot fluctuations are minimized. The external power supply voltage may be supplied to a first bus. The core power supply voltage may be distributed on a second bus. A ring of transistors may be used to convey power from the first bus to the second bus. Control circuitry may control the ring of transistors based on programmable setpoint voltages.