Abstract: An SOI IC includes a polysilicon/silicon plug extending through the buried insulation layer between a P-type handle layer and a P-type device layer. An N-type well region is formed in the device layer over the polysilicon/silicon plug, and then a high-voltage (HV) device is formed in the well region such that part of its drift region is located over the polysilicon/silicon plug. Doping of the well region, the polysilicon/silicon plug and the handle layer is coordinated to form a P-N junction diode that couples the HV device, by way of the polysilicon/silicon plug, to a ground potential applied to the handle layer, thereby increasing the HV device's breakdown voltage by expanding its depletion region to include the handle layer. The polysilicon/silicon plug grows in holes formed through the insulation layer during the epitaxial silicon growth process used to form the device layer.

Abstract: A method for communication includes receiving signals transmitted over the air by first and second mobile stations on a common frequency channel in a wireless packet network, the signals carrying first and second data packets transmitted by the first and second mobile stations, respectively, the first and second data packets comprising respective, first and second headers. The received signals are processed so as to identify the first header. Responsively to the identified first header, signal values corresponding to at least a portion of the first data packet are reconstructed, and the reconstructed signal values are subtracted from the received signals so as to produce a modified signal. The modified signal is processed in order to identify the second header. The first and second data packets are demodulated using the identified first and second headers.

Abstract: A method for communication includes receiving signals transmitted over the air by first and second mobile stations on a common frequency channel in a wireless packet network, the signals carrying first and second data packets transmitted by the first and second mobile stations, respectively, the first and second data packets comprising respective, first and second headers. The received signals are processed so as to identify the first header. Responsively to the identified first header, signal values corresponding to at least a portion of the first data packet are reconstructed, and the reconstructed signal values are subtracted from the received signals so as to produce a modified signal. The modified signal is processed in order to identify the second header. The first and second data packets are demodulated using the identified first and second headers.