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:
Dec. 13, 2005
Filed:
May. 12, 2000
Abhijit M. Phanse, Santa Clara, CA (US);
Peter J. Sallaway, San Diego, CA (US);
Thulasinath G. Manickam, San Diego, CA (US);
Abhijit M. Phanse, Santa Clara, CA (US);
Peter J. Sallaway, San Diego, CA (US);
Thulasinath G. Manickam, San Diego, CA (US);
National Semiconductor Corporation, Santa Clara, CA (US);
Abstract
There is disclosed a mixed mode equalization system for use in a transceiver capable of operating in a high frequency Ethernet local area network (LAN). The mixed mode equalization system comprises: 1) an adaptive analog equalization filter for amplifying a first high frequency component of an incoming analog signal by a first adjustable gain factor to produce an analog filtered incoming signal; 2) an analog-to-digital converter (ADC) for converting the analog filter incoming signal to a first incoming digital signal; 3) a digital finite impulse response (FIR) filter for amplifying a second high frequency component of the first incoming digital signal factor to produce a digital filtered incoming signal; 4) a digital FIR controller for modifying at least one digital filter coefficient of the digital FIR filter according to a signal error associated with a digital output of the digital FIR filter; and 5) an analog equalization controller for modifying the first adjustable gain factor associated with the adaptive analog equalization filter according to a value of the at least one digital filter coefficient.