Issued Patents All Time
Showing 1–25 of 34 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11356126 | Detecting high TX leakage to improve linearity | Mohammed Alam, David Anthony Graham, Jorge Ivonnet, Hasham Khushk, John J. Parkes, Jr. | 2022-06-07 |
| 7446434 | Dual mode power management system | John Wayne Simmons | 2008-11-04 |
| 7397291 | Clock jitter minimization in a continuous time sigma delta analog-to-digital converter | John J. Parkes, Jr., James J. Riches | 2008-07-08 |
| 6839387 | Self-dithering sigma-delta converter and communication device incorporating same | — | 2005-01-04 |
| 6606359 | Area-optimum rapid acquisition cellular multi-protocol digital DC offset correction scheme | Manbir Singh Nag | 2003-08-12 |
| 6560447 | DC offset correction scheme for wireless receivers | Mahibur Rahman, Christopher Thomas, Robert Karl Schweickert, Clinton C. Powell, II | 2003-05-06 |
| 6356142 | Digital filter tune loop | — | 2002-03-12 |
| 6275540 | Selective call receiver having an apparatus for modifying an analog signal to a digital signal and method therefor | Raymond Louis Barrett, Jr., Barry W. Herold | 2001-08-14 |
| 5986598 | Sigma delta data converter with feed-forward path to stabilize integrator signal swing | — | 1999-11-16 |
| 5841822 | Band-pass sigma-delta converter and commutating filter therefor | Raymond Louis Barrett, Jr., Walter R. Davis | 1998-11-24 |
| 5828295 | Mode tracking transducer driver for a non-linear transducer | John M. McKee, Darrell Curtis Weber | 1998-10-27 |
| 5789987 | Low-noise frequency synthesizer | Scott Robert Humphreys | 1998-08-04 |
| 5787125 | Apparatus for deriving in-phase and quadrature-phase baseband signals from a communication signal | — | 1998-07-28 |
| 5768315 | Band-pass sigma-delta converter and commutating filter therefor | Raymond Louis Barrett, Jr., Walter R. Davis | 1998-06-16 |
| 5734974 | Selective call receivers with stepwise variable gain control | Edgar H. Callaway, Jr., Vance H. Peterson, Burkhard Dick, Knud Holtvoeth, Wilfried Knop | 1998-03-31 |
| 5701312 | Method and apparatus for selectively providing repeat messages in a radio communication system | Michael J. DeLuca | 1997-12-23 |
| 5650763 | Non-linear reciprocating device | John M. McKee, Gerald E. Brinkley, Philip P. Macnak | 1997-07-22 |
| 5630228 | Double balanced mixer circuit with active filter load for a portable comunication receiver | — | 1997-05-13 |
| 5610558 | Controlled tracking of oscillators in a circuit with multiple frequency sensitive elements | Philip L. Johnson, Raymond Louis Barrett, Jr. | 1997-03-11 |
| 5545970 | Voltage regulator circuit having adaptive loop gain | John J. Parkes, Jr. | 1996-08-13 |
| 5392457 | Battery saving method and apparatus for providing selective receiver power switching | Walter L. Davis | 1995-02-21 |
| 5309483 | Data recovery device | Mark L. Oliboni, Richard A. Erhart | 1994-05-03 |
| 5263192 | Integrated resonant circuit with temperature compensated quality factor | John J. Parkes, Jr. | 1993-11-16 |
| 5251325 | Battery saving method and apparatus for providing selective receiver power switching | Walter L. Davis | 1993-10-05 |
| 5231390 | Selective call receiver with decoder controlled filters | — | 1993-07-27 |