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. 15, 2005
Filed:
May. 28, 2004
Applicant:
Jackie Cheng, Irvine, CA (US);
Inventor:
Jackie Cheng, Irvine, CA (US);
Assignee:
Wionics Research, Irvine, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03F003/45 ;
U.S. Cl.
CPC ...
Abstract
An output stage circuit for a current mode device provides open loop reduction or cancellation of DC offset in differential output signals. Differential input signals are received and sourcing current mirrors provide mirrors of the differential input signals to output nodes. Sinking current mirrors also provide mirrors of opposite polarity of the differential input signals to the output nodes corresponding to the opposing sourcing current mirrors. The summing of the mirror currents at the output nodes substantially reduces or eliminates the DC offset components present in the input signals.