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. 18, 2012
Filed:
Sep. 06, 2011
Stephen A. Jantzi, Laguna Beach, CA (US);
Anilkumar V. Tammineedi, Aliso Viejo, CA (US);
Jungwoo Song, Irvine, CA (US);
Lawrence M. Burns, Laguna Hills, CA (US);
Donald G. Mcmullin, Laguna Hills, CA (US);
Agnes N. Woo, Encino, CA (US);
Stephen A. Jantzi, Laguna Beach, CA (US);
Anilkumar V. Tammineedi, Aliso Viejo, CA (US);
Jungwoo Song, Irvine, CA (US);
Lawrence M. Burns, Laguna Hills, CA (US);
Donald G. McMullin, Laguna Hills, CA (US);
Agnes N. Woo, Encino, CA (US);
Broadcom Corporation, Irvine, CA (US);
Abstract
An upstream amplifier is integrated on a substrate with a digital-to-analog converter (DAC) to form an integrated circuit. In an embodiment, a low-pass filter is also integrated on the substrate. The output signal level of the upstream amplifier is controllable. In embodiments, fine adjustments are made to the output signal level of the upstream amplifier by varying a bias current of the DAC. A software control bit is used to switch between a power-on mode of operation and a power-down mode of operation. The upstream amplifier transmits in a burst mode. The power consumption of the upstream amplifier scales with the amplifier's output signal level. A high degree of matching is attained between the positive and negative paths of the upstream amplifier. This provides high immunity from common-mode disturbances such as substrate noise, clock spurs, and glitches caused by a gain change.