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. 10, 2004
Filed:
Nov. 28, 2002
Ren-Yuan Huang, Irvine, CA (US);
Yi-Ren Hwang, Hsin-Chu, TW;
JMicron Technology Corp., Hsin-Chu, TW;
Abstract
An impedance matching circuit includes a plurality of latch circuits, each connected to one of a plurality of logic circuits. Each latch circuit has a first input commonly connected to a signal line and a second input connected to one of a plurality of non-overlapping digital clock signals. Approximately half of the maximum output resistance is compared with an external resistor and the result latched by a latch circuit corresponding to the most significant bit of the control signal, effectively halving the possible voltage range. A next latch circuit latches the second most significant bit of the control signal similarly, and a third latch circuit latches the remaining bit of the control signal. The control signal controls a binary weighted transistor array that adjusts input voltage. An output signal goes to an output register where it is used to control an output driver.