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:
Mar. 17, 2009
Filed:
Apr. 11, 2007
Jason Y. Miao, San Jose, CA (US);
Timothy G. Moran, San Jose, CA (US);
Jason Y. Miao, San Jose, CA (US);
Timothy G. Moran, San Jose, CA (US);
Finisar Corporaton, Sunnyvale, CA (US);
Abstract
Embodiments disclosed herein relate to an amplifier stage or circuit for providing a signal boost. The circuit includes an emitter-follower pair and a cross coupled differential pair. The cross coupled differential pair provides a feedback signal that provides a boost to a signal output by the emitter follower pair. In some embodiments, a capacitor of the cross coupled differential pair may be adjustable in order to vary the amount of boosting provided. In other embodiments, a current source of the cross coupled differential pair may be adjustable in order to vary the amount of boosting provided.