Gennady S Feygin

US Patent:

6420983, Jul 16, 2002

Filed:

May 25, 2000

Appl. No.:

09/578283

Inventors:

Gennady Feygin - Livingston NJ
David A. Martin - Atlantic Highlands NJ

Assignee:

Texas Instruments Incorporated - Dallas TX

International Classification:

H03M 106

US Classification:

341118, 341120

Abstract:

A method for performing an auto-zero function in a flash analog to digital converter (âADCâ), the ADC including a reference voltage circuit, providing a plurality of evenly spaced analog reference voltages, and a plurality of system voltage comparators for comparing an input voltage against the reference voltages and providing an indication of which reference voltage corresponds to the input voltage. In the method the following steps are performed. A plurality of redundant voltage comparators are provided. A subset of the plurality of system voltage comparators are selected. Auto-zero is performed on the selected comparators, and the redundant comparators are used in the place of the selected comparators. The outputs of the main comparator array and the extra comparators are combined to produce a final digital output.

US Patent:

6856925, Feb 15, 2005

Filed:

Oct 11, 2002

Appl. No.:

10/269349

Inventors:

Khurram Muhammad - Richardson TX, US
Robert B. Staszewski - Garland TX, US
Gennady Feygin - Dallas TX, US

Assignee:

Texas Instruments Incorporated - Dallas TX

International Classification:

G06F019/00

US Classification:

702 75, 455296

Abstract:

When a sample stream is decimated, frequency components from outside of a desired frequency band are aliased into the desired band, causing interference and loss of information. Different decimating ratios result in different frequencies aliasing into the desired frequency band. A current-mode sampling mixer with capacitor banks and that are controlled by a digital control unit with a capability to integrate and decimate an RF current at different decimating ratios is able to measure the frequency spectrum with different decimating ratios. The measured frequency spectrum is then analyzed to detect the presence of interferers aliased into the desired frequency band. The interferers can then be eliminated or avoided.

US Patent:

7103489, Sep 5, 2006

Filed:

Aug 23, 2004

Appl. No.:

10/924303

Inventors:

Khurram Muhammad - Richardson TX, US
Robert B. Staszewski - Garland TX, US
Gennady Feygin - Dallas TX, US

Assignee:

Texas Instruments Incorporated - Dallas TX

International Classification:

G06F 19/00

US Classification:

702 75, 324 7624

Abstract:

When a sample stream is decimated, frequency components from outside of a desired frequency band are aliased into the desired band, causing interference and loss of information. Different decimating ratios result in different frequencies aliasing into the desired frequency band. A current-mode sampling mixer with capacitor banks and that are controlled by a digital control unit with a capability to integrate and decimate an RF current at different decimating ratios is able to measure the frequency spectrum with different decimating ratios. The measured frequency spectrum is then analyzed to detect the presence of interferers aliased into the desired frequency band. The interferers can then be eliminated or avoided.

US Patent:

7183860, Feb 27, 2007

Filed:

Jun 10, 2005

Appl. No.:

11/149859

Inventors:

Robert B. Staszewski - Garland TX, US
Gennady Feygin - Plano TX, US
Oren E. Eliezer - Plano TX, US
Dirk Leipold - Plano TX, US

Assignee:

Texas Instruments Incorporated - Dallas TX

International Classification:

H03C 3/06
H03L 7/091
H03L 7/099

US Classification:

331 1A, 331 14, 331 17, 331 25, 327159, 332127, 375376

Abstract:

A novel apparatus for and a method of estimating, calibrating and tracking in real-time the gain of a radio frequency (RF) digitally controlled oscillator (DCO) in an all-digital phase locked loop (ADPLL). Precise setting of the inverse DCO gain in the ADPLL modulating path allows direct wideband frequency modulation that is independent of the ADPLL loop bandwidth. The gain calibration technique is based on a steepest descent iterative algorithm wherein the phase ADPLL error is sampled and correlated with the modulating data to generate a gradient. The gradient is then scaled and added to the current value of the DCO gain multiplier.

US Patent:

7466207, Dec 16, 2008

Filed:

Jan 3, 2007

Appl. No.:

11/619529

Inventors:

Robert B. Staszewski - Garland TX, US
Gennady Feygin - Plano TX, US
Oren E. Eliezer - Plano TX, US
Dirk Leipold - Plano TX, US

Assignee:

Texas Instruments Incorporated - Dallas TX

International Classification:

H03C 3/06
H03L 7/091
H03L 7/099

US Classification:

331 1A, 331 14, 331 17, 331 25, 327159, 332127, 375376

Abstract:

A novel apparatus for and a method of estimating, calibrating and tracking in real-time the gain of a radio frequency (RF) digitally controlled oscillator (DCO) in an all-digital phase locked loop (ADPLL). Precise setting of the inverse DCO gain in the ADPLL modulating path allows direct wideband frequency modulation that is independent of the ADPLL loop bandwidth. The gain calibration technique is based on a steepest descent iterative algorithm wherein the phase ADPLL error is sampled and correlated with the modulating data to generate a gradient. The gradient is then scaled and added to the current value of the DCO gain multiplier.

US Patent:

7466777, Dec 16, 2008

Filed:

Aug 23, 2004

Appl. No.:

10/924159

Inventors:

Khurram Muhammad - Richardson TX, US
Robert B. Staszewski - Garland TX, US
Gennady Feygin - Dallas TX, US

Assignee:

Texas Instruments Incorporated - Dallas TX

International Classification:

H03D 1/04

US Classification:

375346, 375350

Abstract:

When a sample stream is decimated, frequency components from outside of a desired frequency band are aliased into the desired band, causing interference and loss of information. Different decimating ratios result in different frequencies aliasing into the desired frequency band. A current-mode sampling mixer with capacitor banks and that are controlled by a digital control unit with a capability to integrate and decimate an RF current at different decimating ratios is able to measure the frequency spectrum with different decimating ratios. The measured frequency spectrum is then analyzed to detect the presence of interferers aliased into the desired frequency band. The interferers can then be eliminated or avoided.

US Patent:

7647192, Jan 12, 2010

Filed:

Aug 23, 2004

Appl. No.:

10/924297

Inventors:

Khurram Muhammad - Dallas TX, US
Robert B. Staszewski - Delft, NL
Gennady Feygin - Dallas TX, US

Assignee:

Texas Instruments Incorporated - Dallas TX

International Classification:

G06F 19/00

US Classification:

702 75

Abstract:

When a sample stream is decimated, frequency components from outside of a desired frequency band are aliased into the desired band, causing interference and loss of information. Different decimating ratios result in different frequencies aliasing into the desired frequency band. A current-mode sampling mixer with capacitor banks and that are controlled by a digital control unit with a capability to integrate and decimate an RF current at different decimating ratios is able to measure the frequency spectrum with different decimating ratios. The measured frequency spectrum is then analyzed to detect the presence of interferers aliased into the desired frequency band. The interferers can then be eliminated or avoided.

US Patent:

7808327, Oct 5, 2010

Filed:

Aug 7, 2006

Appl. No.:

11/500083

Inventors:

Gennady Feygin - Plano TX, US
Khurram Muhammad - Dallas TX, US
Chih-Ming Hung - McKinney TX, US

Assignee:

Texas Instruments Incorporated - Dallas TX

International Classification:

H03B 27/00

US Classification:

331 46, 331 47, 331 48, 331 55, 331 57

Abstract:

Methods and systems to provide digitally controlled crystal oscillators are disclosed. One example method includes determining a state of an oscillator system and selecting a first output of a digitally controlled crystal oscillator or a second output of a second oscillator based on the determination. In an example implementation, the second oscillator is a ring oscillator.