The following list of patents and invention disclosures have been invented by the founder of Zelectronix, and are owned by other companies.

P.T.M. van Zeijl, “Negative feedback amplifiers with accurate input- or output-impedance in combination with high- or low-output or input-impedance”, US4897610 (1990), EP0289099 (1988).

P.T.M. van Zeijl and J.H. van Bruggen, “Device and antenna for cordless radio communication”, US5802458 (1998), WO95/02284 (1995), DE69414853 (1998), EP0707760 (1998).

P.T.M. van Zeijl, “A method of and a device for analog signal sampling”, US6285307 (2001), EP0862274 (1998), EP0962057 (1998), WO 98/38745 (1998), DE69805396 (2002).

P.T.M. van Zeijl, “A method and a circuit for automatic gain control”, EP0929150 (1999), US7095284 (2006).

P.T.M. van Zeijl, “Phase lock circuits”, US6590459 (2003).

P.T.M. van Zeijl, “Method for Improved Image Rejection”, GB2357202 (2001), EP1236285 (2001).

P.T.M. van Zeijl and J. Tangenberg, “High-Frequency MOS oscillator”, NL-1014377,  2001, US6897736 (2005), EP1264400/WO2001/67604 (2001).

P.T.M. van Zeijl, “Low-Distortion Driving Amplifier For Integrated Filters”, US 6489847, 2002, DE60109583 (2006), EP1254510 (2006), DE60109583.

P.T.M. van Zeijl, “Amplifier Device” or “Duty-Cycle Gain Control”, WO 2003/007475 (2003), US2004/0183595 (2004).

P.T.M. van Zeijl, “Amplifier-Mixer Device”, US7109795 (2006), EP1378056, WO2002/082635 (2002).

P.T.M. van Zeijl and H. Geis, “Equaliser Circuit for use in Radio Frequency signal Receivers”, US6525621 (2003).

P.P. Vervoort and P.T.M. van Zeijl, “Balanced Oscillator Circuit”, WO03/007469.

P.T.M. van Zeijl, “Frequency Divider With Analog Resolution Without Spurious”, WO 2003/00588A1, EP1405417, US7084678 (2006), DE60108908.

P.T.M. van Zeijl, “Oscillator circuit and oscillator biasing method”, GB2396263 (2003), EP1493226/WO2003/088473 (2003), US2005/0225407 (2005), US7167062.

P.T.M. van Zeijl, “Integrated Oscillators and Tuning Circuits” or “Integrated Oscillators and Tuning Circuits”, US6268779 (2001), WO2000/57454 (2000).

P.T.M. van Zeijl and J. Haartsen, “High density analog integrated circuits”, WO2004/102665.

J.W. Eikenbroek  and P.T.M. van Zeijl, “Transceiver architecture with reduced VCO-pulling sensitivity”, EP1647097/WO2005/015759 (2005), US2005/0036566 (2005), US7480343B2, EP1647097.

P.T.M. van Zeijl and J.P. Frambach, “Pulling-free LO generation”, WO2005/107059, EP1745544.

P.T.M. van Zeijl, “Generation of third-harmonic with low spurious component without filtering”, EP1797637, WO2006035273.

P.T.M. van Zeijl and N.C. Bird, “Combined WLAN and Bluetooth Receiver”, US20080146185, EP1851862, WO2006085255.

G. Wetzker, A. Payne and P.T.M. van Zeijl, “A re-clocking System Exploiting non-constant low-jitter sampling clocks”, WO2006123264.

P.T.M. van Zeijl and M. Collados, “A polar OFDM WLAN transmitter architecture”, WO2007122562.

P.T.M. van Zeijl, G.W. de Jong and D. Jeurissen, “A high IIP2 CMOS receiver architecture”, WO2008018033, EP2054999.

M. Collados, N. Pavlovic, V. Vidojkovic and P.T.M. van Zeijl, “Power efficient envelope and phase signal generation for polar transmitters”, WO2007144806, EP2038995.

M. Collados, N. Pavlovic, V. Vidojkovic and P.T.M. van Zeijl, “Improved phase-to-frequency conversion procedure for polar transmitters”, WO2008001269.

P.T.M. van Zeijl and N.C. Bird, “Measuring/calibration of transmit signals in UMTS-FDD/WBCDMA-FDD transceivers”, EP2039103, WO2008007329.

P.T.M. van Zeijl, K. van Berkel, O. Paker, K. Challapali, “Interference Cancellation”, WO2008053414.

P.T.M. van Zeijl and T. Sayers, “A Signal Generator and a method for calibration of image rejection and second order intercept”, EP2052479, WO2008059391.

P.T.M. van Zeijl, “A calibration technique for an envelope DAC in a polar transmitter”, WO2008/107833.

P.T.M. van Zeijl and M. Collados, “A polar WLAN OFDM transmitter envelope DAC architecture with enhanced efficiency”, WO2008072134.

P.T.M. van Zeijl, M. Duperray and M. Collados, “A MIMO Polar Transmit Architecture”, WO2009022254.

P.T.M. van Zeijl, N. Bird, A. Davie, “An XTAL-less transceiver using a variable transmit bandwidth”, WO2009019639.

P.T.M. van Zeijl, N. Bird, “Calibration of Transmit Signals in FDD-transceivers”, US8238838.

P.T.M. van Zeijl, P. Mattheijssen, OA Santa, H. Veenstra, NC Bird, “Distance Measurement”, US20110122012, US8514125.

P.T.M. van Zeijl, H.T. van der Zanden, “Multiple Radar System”, WO2012/023087.

P.T.M. van Zeijl, H.T. van der Zanden, “Lighting System with Radar Detection”, WO2012/059842.

H.T. van der Zanden, P.T.M. van Zeijl, “System Comprising a Plurality of Object Detection Modules”, WO2012/085729.

F. Compvoets, P.T.M. van Zeijl, “Adjustable Frequency-Determining Element”, WO2012066452.

P.T.M. van Zeijl, J.L.C Rompen, T.S. Savelyev, “Horn-like extension for integrated antenna”, NL20131040185, PCT/NL2014/050276, EP 2989680, JP 2016-510639, US2016/0079675.

P.T.M. van Zeijl, J.L.C Rompen, “Radio frequency module”, US20126170564, JP 2015-53247410639, PCT/EP2013/070128.