Issued Patents All Time
Showing 26–46 of 46 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7376399 | Weighted mixing circuitry for quadrature processing in communication systems | David R. Welland | 2008-05-20 |
| 7353011 | Method and apparatus for operating a PLL for synthesizing high-frequency signals for wireless communications | David R. Welland | 2008-04-01 |
| 7292091 | Method and apparatus for reducing interference | David R. Welland, Donald A. Kerth | 2007-11-06 |
| 7289145 | Correlated double sampling variable gain amplifier circuit for use in a digital camera | Sandra M. Johnson, Shih-Chung Chao, Nadi R. Itani, Brannon Harris, Ash Prabala +4 more | 2007-10-30 |
| 7242912 | Partitioning of radio-frequency apparatus | James Maligeorgos, Augusto Marques, Lysander Lim, G. Tyson Tuttle, Aslamali A. Rafi +7 more | 2007-07-10 |
| 7221921 | Partitioning of radio-frequency apparatus | James Maligeorgos, Augusto Marques, Lysander Lim, G. Tyson Tuttle, Aslamali A. Rafi +7 more | 2007-05-22 |
| 7199650 | Method and apparatus for reducing interference | David R. Welland, Donald A. Kerth | 2007-04-03 |
| 7092675 | Apparatus and methods for generating radio frequencies in communication circuitry using multiple control signals | Lysander Lim, David R. Welland, Donald A. Kerth, Richard T. Behrens, Jeffrey W. Scott +3 more | 2006-08-15 |
| 6993314 | Apparatus for generating multiple radio frequencies in communication circuitry and associated methods | Lysander Lim, David R. Welland, Donald A. Kerth, Richard T. Behrens, Jeffrey W. Scott +3 more | 2006-01-31 |
| 6993307 | Method and apparatus for operating a PLL with a phase detector/sample hold circuit for synthesizing high-frequency signals for wireless communications | David R. Welland | 2006-01-31 |
| 6965761 | Controlled oscillator circuitry for synthesizing high-frequency signals and associated method | David R. Welland | 2005-11-15 |
| 6750906 | Histogram-based automatic gain control method and system for video applications | Nadi R. Itani, David R. Welland | 2004-06-15 |
| 6741846 | Method and apparatus for operating a PLL with a phase detector/sample hold circuit for synthesizing high-frequency signals for wireless communications | David R. Welland | 2004-05-25 |
| 6650364 | Selectable threshold multimode gain control apparatus and method for setting mutually continuous analog, digital, and shutter gain levels | Nadi R. Itani, David R. Welland | 2003-11-18 |
| 6574288 | Method and apparatus for adjusting a digital control word to tune synthesized high-frequency signals for wireless communications | David R. Welland | 2003-06-03 |
| 6549765 | Phase locked loop circuitry for synthesizing high-frequency signals and associated method | David R. Welland | 2003-04-15 |
| 6317006 | Frequency synthesizer utilizing phase shifted control signals | David R. Welland | 2001-11-13 |
| 6311050 | Single integrated circuit phase locked loop for synthesizing high-frequency signals for wireless communications and method for operating same | David R. Welland, Donald A. Kerth | 2001-10-30 |
| 6308055 | Method and apparatus for operating a PLL for synthesizing high-frequency signals for wireless communications | David R. Welland | 2001-10-23 |
| 6167245 | Method and apparatus for operating a PLL with a phase detector/sample hold circuit for synthesizing high-frequency signals for wireless communications | David R. Welland | 2000-12-26 |
| 6150891 | PLL synthesizer having phase shifted control signals | David R. Welland | 2000-11-21 |