Issued Patents All Time
Showing 26–50 of 66 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6665523 | Receiver tuning system | Cicero Silveira Vaucher | 2003-12-16 |
| 6509802 | PLL-tuning system having a phase detector with a sampling frequency equal to a reference frequency | — | 2003-01-21 |
| 6366769 | Frequency snythesizer with a digital frequency window detector and a receiver incorporating the same | Cicero Silveira Vaucher | 2002-04-02 |
| 6064870 | Interference detection circuit having amplitude frequency domain defined discrimination | Arie Kuehn | 2000-05-16 |
| 5929678 | Frequency synthesis circuit having a charge pump | Cicero Silveira Vaucher | 1999-07-27 |
| 5839060 | Logarithmic level detector and a radio receiver | Hendricus de Ruijter | 1998-11-17 |
| 5809407 | Receiver, an arrangement and a method for comparing two signals | Cicero Silveira Vaucher | 1998-09-15 |
| 5715529 | FM receiver including a phase-quadrature polyphase if filter | Kaveh Kianush, Wolter Bijker, Hendricus C. De Ruyter, Willem A. Sloof | 1998-02-03 |
| 5572164 | FM demodulator with threshold extension and receiver comprising such an FM demodulator | Robert Kokke | 1996-11-05 |
| 5548831 | FM Receiver having multiple IF stages | Wolter Bijker, Hendricus C. De Ruyter, Willem A. Sloof | 1996-08-20 |
| 5493250 | Adjustable resistance device including first and second arrangements of a resistor and a positive-feedback transconductor, and a control circuit for controlling the resistances of the first and second arrangements | Hendricus C. De Ruyter | 1996-02-20 |
| 5404589 | FM receiver with dynamic intermediate frequency (IF) filter tuning | Wolter Bijker, Hendricus C. De Ruyter, Willem A. Sloof | 1995-04-04 |
| 5341107 | FM quadrature demodulator with two phase comparison circuits | Wolter Bijker, Hendricus C. De Ruytere, Willem A. Sloof | 1994-08-23 |
| 5221911 | Receiver having PLL frequency synthesizer with RC loop filter | Hubertus H. M. Vereijken | 1993-06-22 |
| 5220686 | Tunable resonance amplifier | Hendricus de Ruijter | 1993-06-15 |
| 5113419 | Digital shift register | — | 1992-05-12 |
| 5093930 | Directly mixing synchronous AM receiver | — | 1992-03-03 |
| 5093635 | Controllable oscillator having transconductance circuits with amplitude stabilization | Hendricus de Ruijter | 1992-03-03 |
| 4973920 | Controllable quadrature oscillator | — | 1990-11-27 |
| 4970469 | Phase detector and frequency demodulator including such a phase detector | — | 1990-11-13 |
| 4903331 | Quadrature detection receiver with separate amplitude and phase control | — | 1990-02-20 |
| 4814715 | Mixer arrangement for suppression of oscillator interference in quadrature demodulators | — | 1989-03-21 |
| 4740759 | Angle demodulator with second order interference prevention | Harry Barend Schoonheijm | 1988-04-26 |
| 4709163 | Current-discrimination arrangement | — | 1987-11-24 |
| 4642482 | Level-shifting circuit | Johannes C. M. Meeuwis | 1987-02-10 |