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:
Jul. 23, 2013
Filed:
Jan. 08, 2011
Koji Fukuda, Fuchu, JP;
Hiroki Yamashita, Hachioji, JP;
Koji Fukuda, Fuchu, JP;
Hiroki Yamashita, Hachioji, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
Disclosed is an output driver circuit capable of realizing reduction in power consumption, and/or enhancement in transmission waveform quality in addition to an increase in transmission speed. The output driver circuit is provided with, for example, a voltage-signal generation circuit block VSG_BK for driving positive negative output-nodes (TXP, TXN) by voltage, -pulse-signal generation circuits PGEN, PGENfor generating a pulse signal upon a transition of data input signals DIN_P, DIN_N, and current-signal generation circuit blocks ISG_BKp, ISG_BKn, for driving TXP, TXN by current for the duration of a pulse width of the pulse-signal. The current-signal generation circuit block executes high-speed charging of parasitic capacitors Cp, Cp, occurring to TXP, TXN, respectively, while executing charging of parasitic capacitors Cp, Cp, occurring to impedance Zrespectively. VSG_BK decides a voltage level at TXP, TXN, in the stationary state, keeping TXP, TXN as terminal nodes at impedance Z, respectively.