| 6940969 |
Capacitor cancellation method and apparatus |
Robert Chen, John Gammel |
2005-09-06 |
| 6842518 |
Frequency-dependent impedance synthesis for DSL interface circuits |
Robert Chen, John Gammel |
2005-01-11 |
| 6657496 |
Amplifier circuit with regenerative biasing |
Robert Chen, John Gammel, Joseph H. Havens |
2003-12-02 |
| 6356593 |
Data optimized codec |
Nuri Ruhi Dagedeviren, Lynn Emery Ditty, Donald L. Duttweiler, Gerard Pepenella |
2002-03-12 |
| 6169425 |
Voltage sensing current foldback switch circuit |
Dean M. Umberger |
2001-01-02 |
| 5974363 |
Self-testing of smart line cards |
John Gammel, Christine Mary Gervesh, Randy Lee Hafer, Ronald Joseph Rees, Robert Vaiden, II |
1999-10-26 |
| 5936391 |
Partially temperature compensated low noise voltage reference |
Frode Larsen, Douglas G. Marsh |
1999-08-10 |
| 5881129 |
Self-monitoring line interface circuit |
Robert Chen, John Gammel |
1999-03-09 |
| 5854839 |
Dual voltage, self-monitoring line circuit |
Robert Chen, John Gammel |
1998-12-29 |
| 5848149 |
Subscriber line interface and power circuit |
Robert Chen, Paul W. Frazier, John Gammel, Andrew Marsh, Apurba Roy |
1998-12-08 |
| 5659610 |
Battery feed circuit |
Ian A. Schorr |
1997-08-19 |
| 4939775 |
Telephone ringing detector |
Kenneth Houck |
1990-07-03 |
| 4896093 |
Electronic inductor |
— |
1990-01-23 |
| 4510550 |
Relay driver |
— |
1985-04-09 |
| 4503289 |
Line circuit with flux compensation and active impedance termination |
— |
1985-03-05 |
| 4477780 |
Operational amplifier with multiple switchable outputs |
— |
1984-10-16 |
| 4476350 |
Battery feed circuit |
Denis W. Aull |
1984-10-09 |
| 4454479 |
Operational amplifier with improved output capability |
— |
1984-06-12 |
| 4323885 |
Noise and crosstalk reduction in mid-riser biased encoders |
Joseph F. Carriere, Wilmer B. Gaunt, Jr., Joseph Elide Landry |
1982-04-06 |