Issued Patents All Time
Showing 1–13 of 13 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6263199 | Circuit and method of signal frequency conversion | Klaas Wortel | 2001-07-17 |
| 6104227 | RF mixer circuit and method of operation | Jeffery C. Durec, David K. Lovelace | 2000-08-15 |
| 5329585 | Subscriber line interface circuit for controlling AC and DC output impedance | David M. Susak, Tony Takeshian | 1994-07-12 |
| 5198957 | Transient protection circuit using common drain field effect transistors | John Bliss, Judith L. Sutor, Stephen P. Robb, David M. Susak, Lloyd Hayes | 1993-03-30 |
| 4994758 | Alpha enhancement of a transistor using base current feedback to the emitter | — | 1991-02-19 |
| 4724540 | Speakerphone with fast idle mode | W. David Pace | 1988-02-09 |
| 4720856 | Control circuit having a direct current control loop for controlling the gain of an attenuator | W. David Pace | 1988-01-19 |
| 4689506 | Control circuit for use with electronic attenuators and method for providing a control signal proportional to absolute temperature | W. David Pace | 1987-08-25 |
| 4648103 | Flip-flop having divide inhibit circuitry to change divide ratio | W. David Pace | 1987-03-03 |
| 4599494 | Ring sense telephone tone ringer circuit | — | 1986-07-08 |
| 4491804 | Bias circuit which is independent of output device voltage characteristics for biasing an amplifier in class AB operation | W. Eric Main, Don W. Zobel | 1985-01-01 |
| 4485341 | Current limiter circuit | Don W. Zobel | 1984-11-27 |
| 4431874 | Balanced current multiplier circuit for a subscriber loop interface circuit | Don W. Zobel, W. Eric Main, W. David Pace | 1984-02-14 |