Issued Patents All Time
Showing 1–15 of 15 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7570110 | Arrangement for demodulating a vestigal sideband signal | — | 2009-08-04 |
| 7499105 | Compensation circuit for frequency filters | Axel Kattner | 2009-03-03 |
| 7236049 | Circuit arrangement and transistor control method | Axel Kattner, Ernst-Peter Ragosche | 2007-06-26 |
| 7233368 | Down-converter | Thomas Hafemeister, Wolfgang Weltersbach | 2007-06-19 |
| 7103186 | Stereo/two-tone demodulator | — | 2006-09-05 |
| 6593974 | Circuit arrangement for demodulating an intermediate-frequency video signal | Thomas Hafemeister | 2003-07-15 |
| 6519008 | Filter circuit | Axel Kattner | 2003-02-11 |
| 5838395 | IF demodulator circuit with variable IF gain control | — | 1998-11-17 |
| 5714915 | Oscillator | — | 1998-02-03 |
| 5526061 | Circuit arrangement for demodulating a video signal | Thomas Hafemeister, Wolfgang Weltersbach | 1996-06-11 |
| 5483298 | Circuit arrangement for demmodulating the sound signals in a television signal in accordance with at least two different transmission standards | Wolfgang Weltersbach | 1996-01-09 |
| 5434543 | Oscillator with switchable varactor diodes | Wolfgang Weltersbach | 1995-07-18 |
| 5412345 | Amplifier arrangement having a relatively stable reference potential | — | 1995-05-02 |
| 4994756 | Circuit arrangement for amplifying a television signal | — | 1991-02-19 |
| 4945313 | Synchronous demodulator having automatically tuned band-pass filter | Wolfgang Weltersbach | 1990-07-31 |