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. 06, 2001
Filed:
Jan. 18, 2000
Takahiro Seki, Kanagawa, JP;
Katsunori Seno, Kanagawa, JP;
Sony Corporation, Tokyo, JP;
Abstract
A power source voltage controller which can set the optimal margin for a replica circuit and shorten the time for the power source voltage to converge to the optimal value, having a replica circuit for monitoring a delay time of a critical path by propagating a reference signal having a power source voltage-delay characteristic approximately equivalent to a critical path in a semiconductor circuit, a phase difference detection circuit and an encoder receiving a delay signal by the replica circuit and the reference signal and detecting the phase difference of the delay signal from the reference signal and outputting the detection result as phase difference information, voltage control circuits for generating a power source voltage of a value based on a phase difference information signal and supplying it to the semiconductor circuit and the replica circuit, and a delay error correction circuit arranged at the input side of the reference signal of the replica circuit and correcting the delay difference with the critical path.