Ramon J Gomez

US Patent:

7952502, May 31, 2011

Filed:

Nov 18, 2010

Appl. No.:

12/949752

Inventors:

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

Assignee:

Broadcom Corporation - Irvine CA

International Classification:

H03M 1/06

US Classification:

341118, 341119, 341120, 341139, 341155, 341159

Abstract:

Imbalance and distortion cancellation for composite analog to digital converter (ADC). Such an ‘ADC’ is implemented using two or more ADCs may be employed for sampling (e. g. , quantizing, digitizing, etc. ) of an analog (e. g. , continuous time) signal in accordance with generating a digital (e. g. , discrete time) signal. Using at least two ADCs allows for the accommodation and sampling of various signals having a much broader dynamic range without suffering degradation in signal to noise ratio (SNR). Generally, the signal provided via at least one of the paths corresponding to at least one of the respective ADCs is scaled (e. g. , attenuated), so that the various ADCs effectively sample signals of different magnitudes. The ADCs may respectively correspond to different magnitude and/or power levels (e. g. , high power, lower power, any intermediary power level, etc. ).

US Patent:

8406340, Mar 26, 2013

Filed:

Aug 31, 2011

Appl. No.:

13/223156

Inventors:

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

Assignee:

Broadcom Corporation - Irvine CA

International Classification:

H04L 1/02
H04L 25/03
H04L 25/49

US Classification:

375296, 398193, 4551142

Abstract:

Distortion and aliasing reduction for digital to analog conversion. Synthesis of one or more distortion terms made based on a digital signal (e. g. , one or more digital codewords) is performed in accordance with digital to analog conversion. The one or more distortion terms may correspond to aliased higher-order harmonics, distortion, nonlinearities, clipping, etc. Such distortion terms may be known a priori, such as based upon particular characteristics of a given device, operational history, etc. Alternatively, such distortion terms may be determined based upon operation of a device and/or based upon an analog signal generated from the analog to conversion process. For example, frequency selective measurements made based on an analog signal generated from the digital to analog conversion may be used for determination of and/or adaptation of the one or more distortion terms. One or more DACs may be employed within various architectures operative to perform digital to analog conversion.

US Patent:

8411791, Apr 2, 2013

Filed:

Aug 31, 2011

Appl. No.:

13/223124

Inventors:

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

Assignee:

Broadcom Corporation - Irvine CA

International Classification:

H04K 1/02
H04L 25/03
H04L 25/49

US Classification:

375296, 398192, 398193, 4551142, 4551143

Abstract:

Distortion and aliasing reduction for digital to analog conversion. Synthesis of one or more distortion terms made based on a digital signal (e. g. , one or more digital codewords) is performed in accordance with digital to analog conversion. The one or more distortion terms may correspond to aliased higher-order harmonics, distortion, nonlinearities, clipping, etc. Such distortion terms may be known a priori, such as based upon particular characteristics of a given device, operational history, etc. Alternatively, such distortion terms may be determined based upon operation of a device and/or based upon an analog signal generated from the analog to conversion process. For example, frequency selective measurements made based on an analog signal generated from the digital to analog conversion may be used for determination of and/or adaptation of the one or more distortion terms. One or more DACs may be employed within various architectures operative to perform digital to analog conversion.

US Patent:

8571137, Oct 29, 2013

Filed:

Aug 31, 2011

Appl. No.:

13/223094

Inventors:

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

Assignee:

Broadcom Corporation - Irvine CA

International Classification:

H04K 1/02
H04L 25/03
H04L 25/49

US Classification:

375296, 398192, 398193, 4551142, 4551143

Abstract:

Distortion and aliasing reduction for digital to analog conversion. Synthesis of one or more distortion terms made based on a digital signal (e. g. , one or more digital codewords) is performed in accordance with digital to analog conversion. The one or more distortion terms may correspond to aliased higher-order harmonics, distortion, nonlinearities, clipping, etc. Such distortion terms may be known a priori, such as based upon particular characteristics of a given device, operational history, etc. Alternatively, such distortion terms may be determined based upon operation of a device and/or based upon an analog signal generated from the analog to conversion process. For example, frequency selective measurements made based on an analog signal generated from the digital to analog conversion may be used for determination of and/or adaptation of the one or more distortion terms. One or more DACs may be employed within various architectures operative to perform digital to analog conversion.

US Patent:

20110227768, Sep 22, 2011

Filed:

May 29, 2011

Appl. No.:

13/118429

Inventors:

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

Assignee:

BROADCOM CORPORATION - IRVINE CA

International Classification:

H03M 1/06

US Classification:

341118

Abstract:

Imbalance and distortion cancellation for composite analog to digital converter (ADC). Such an ‘ADC’ is implemented using two or more ADCs may be employed for sampling (e.g., quantizing, digitizing, etc.) of an analog (e.g., continuous time) signal in accordance with generating a digital (e.g., discrete time) signal. Using at least two ADCs allows for the accommodation and sampling of various signals having a much broader dynamic range without suffering degradation in signal to noise ratio (SNR). Generally, the signal provided via at least one of the paths corresponding to at least one of the respective ADCs is scaled (e.g., attenuated), so that the various ADCs effectively sample signals of different magnitudes. The ADCs may respectively correspond to different magnitude and/or power levels (e.g., high power, lower power, any intermediary power level, etc.). Various implementations of compensation may be performed along the various paths corresponding to the respective ADCs.