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:
Jun. 06, 2002
Applicant:
Inventor:
Chin-Hsin Yang, Taipei Hsien, TW;
Assignee:
PixArt Imagning Inc., Hsin-Chu, TW;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03K 1/9175 ;
U.S. Cl.
CPC ...
H03K 1/9175 ;
Abstract
A driving circuit for transmission lines. The driving circuit transforms outgoing signals of an internal circuit to signals large enough to be sent to an external circuit by the transmission lines, especially for RS-232 transmission lines. It comprises three transistors, six resistors, three capacitors and one diode. The expensive signal driver chip needed in the conventional circuit is not necessary in the present invention. The expensive chip is replaced by cheap discrete components. This reduces the cost of the driving circuit.