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. 24, 2004
Filed:
Aug. 06, 2002
Nianxiong Tan, Laguna Niguel, CA (US);
Globespanvirata, Inc., Red Bank, NJ (US);
Abstract
The present invention relates to improved ADC buffers and AFEs for high frequency applications, such as VDSL. The present invention can also be programmably configured for other xDSL applications. In this regard, a buffer circuit for a high-bandwidth analog-to-digital converter (ADC) includes a first unity-gain buffer configured to receive an analog input signal. The first unity-gain buffer includes a MOSFET differential amplifier with a current mirror load and a transient-reduction network electrically interconnected with the MOSFET differential amplifier and configured to reduce transient energy emitted by the ADC. The buffer circuit also includes a second unity-gain buffer cascaded to the first unity-gain buffer and configured to provide the analog input signal from the first unity-gain buffer to the ADC.