Abstract: In at least some embodiments, an electronic device includes a first data endpoint and differential data transceiver coupled to the first data endpoint. The differential transceiver provides a communication interface between the first data endpoint and a second data endpoint. The differential transceiver compensates for variations in a series impedance and/or a parallel impedance for a differential data line between the differential transceiver and the second data endpoint.

Abstract: In at least some embodiments, an electronic device includes a first data endpoint and differential data transceiver coupled to the first data endpoint. The differential transceiver provides a communication interface between the first data endpoint and a second data endpoint. The differential transceiver compensates for variations in a series impedance and/or a parallel impedance for a differential data line between the differential transceiver and the second data endpoint.

Abstract: A modulation circuit uses pre-calculated and stored data to generate the modulated output. The modulator architecture uses pre-calculated, Gaussian filtered sine and cosine responses that are stored in a ROM (read-only memory) or other memory structure. The modulator output is then calculated as a simple sum of values read from the ROM and controlled by the input burst data stream.

Abstract: To minimize abrupt changes in modulated signal amplitude when switching between modulation types in a multi-modulation system, a “smoothing” circuit is used. When the modulation type is changed in a multi-slot modulation, the last symbol of the previous slot is overwritten and modulation is controlled by a smoothing circuit during the time of the final symbol of the previous slot to effect the trajectory smoothing. The IQ-plane is divided into two (or more) zones, each with an associated safe point. After the next-to-last symbol is modulated, modulation is made to jump to the safe point associated with the zone and modulation continues to a starting point. From the starting point, the next slot can be modulated using the new modulation type.

Abstract: A modulation circuit uses pre-calculated and stored data to generate the modulated output. The modulator architecture uses pre-calculated, Gaussian filtered sine and cosine responses that are stored in a ROM (read-only memory) or other memory structure. The modulator output is then calculated as a simple sum of values read from the ROM and controlled by the input burst data stream.