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:
Jan. 30, 2001
Filed:
Jul. 07, 1998
Macronix International Co., Hsinchu, TW;
Abstract
A pulse shaper for integrated service digital network (ISDN) U-interface. The pulse shaper of the present invention includes a couple of control clock generators, a clock-controlled fully differential switched-capacitor integrator, a fully differential sample and hold circuit, and a fully differential line driver/Rauch lowpass filter. The pulse shaper converts four-level 2B1Q digital input code (D0 and D1) to five staircase-type analog waveform by using fully differential switched-capacitor integrator. The sample and hold circuit then eliminates the spikes in the five-stair waveform and improve the signal linearity. The lowpass filter and telephone line driver is utilized to perform the output signal to comply with the waveform specification of ANSI T1 5.3.2.1 and 5.3.2.2.