Ramon Daniel Gomez

US Patent:

8009075, Aug 30, 2011

Filed:

May 11, 2009

Appl. No.:

12/453431

Inventors:

Bruce J. Currivan - Dove Canyon CA, US
Thomas J. Kolze - Phoenix AZ, US
Lin He - Irvine CA, US
Loke Tan - Newport Coast CA, US
Ramon Gomez - San Juan Capistrano CA, US
Francesco Gatta - Irvine CA, US

Assignee:

Broadcom Corporation - Irvine CA

International Classification:

H03M 1/12

US Classification:

341155, 341132, 341139, 341158, 341159

Abstract:

A method and apparatus is disclosed to extend a dynamic input range of an analog to digital converter (ADC). A composite ADC may include one or more ADCs. The one or more ADCs compare a signal metric of an analog input signal to quantization levels to produce intermediate digital output signals using one or more non-clipping input values. The composite ADC may select among the one or more intermediate digital output signals based on the signal metric of the analog input signal to produce a final digital output.

US Patent:

8471745, Jun 25, 2013

Filed:

Jan 12, 2012

Appl. No.:

13/349260

Inventors:

Bruce J. Currivan - Dove Canyon CA, US
Thomas J. Kolze - Phoenix AZ, US
Ramon A. Gomez - San Juan Capistrano CA, US

Assignee:

Broadcom Corporation - Irvine CA

International Classification:

H03M 1/66

US Classification:

341144, 341136, 341145

Abstract:

Digital to analog converter (DAC) with ternary or tri-state current source. A DAC including a number of ternary or tri-state devices operates based upon codewords provided thereto. Generally, each respective codeword bit directs operation of one of the respective ternary or tri-state devices within the DAC. Each ternary or tri-state device operates in at least three respective operational states (e. g. , based upon the respective values of +1, −1, or 0 being provided thereto). In a current source implementation, each respective current source is implemented to deliver current, draw current, or neither delivered or draw current. In a voltage source implementation, each respective voltage source is implemented to provide a positive voltage, a negative voltage, or provide no voltage. A DAC coding table may be designed based upon characterization of codewords provided to one or more DACs (e. g. , based upon a distribution, a probability density function (PDF), etc.

US Patent:

8618968, Dec 31, 2013

Filed:

Jan 12, 2012

Appl. No.:

13/349107

Inventors:

Bruce J. Currivan - Dove Canyon CA, US
Thomas J. Kolze - Phoenix AZ, US
Ramon A. Gomez - San Juan Capistrano CA, US

Assignee:

Broadcom Corporation - Irvine CA

International Classification:

H03M 1/66

US Classification:

341144, 341145

Abstract:

Dual digital to analog converters (DACs) with codeword parsing. With respect to a codeword that is provided to a DAC, a processing module (e. g. , a rollover processor) operates to divide, partition, etc. the codeword into different respective sub-codewords as may be provided to two or more DAC's. Adaptation with respect to differently generated sub-codewords with respect to different respective codewords may be made in terms of any one or more of a variety of characteristics, including sub-codeword width (e. g. , the number of bits included within a sub-codeword), quantization steps, etc. Moreover, such adaptation may be in consideration of any one or more local and/or remote operating characteristics of one or more devices, communication links, etc. within a communication system or network. Different respective sub-codewords undergo processing by different respective DAC's in generating respective analog signals for combination in generating a final or output analog signal.