Nxp B.v.

Jelle Nico Wolthek

Cecilius Gerardus Kwakernaat

Stefan Gerhard Erich Butselaar

Cornelis Klaas Waardenburg

Cornelis Klass Waardenburg

The invention relates to a receiver for a differential data bus with two resistive branches (), with a differential amplifier with two transistors (), with a resistor (), and with a control logic () that controls a switch () with which a current from a current source () is switchable to either side of the resistor (), which resistor couples the two transistors (), and with two operational amplifiers () which are coupled to the two transistors () of the differential amplifier with opposite poles, in which receiver the control logic detects from the output signals of the two operational amplifiers () whether a '0' or a '1' is expected on the bus and which receiver sets the switch () accordingly so that a comparison with the received bus signal is made.

Apparatus for receiving differential signal using a differential amplifier

The invention relates to a receiver for a differential bus with a switch control logic (), with two branches with resistive elements (and) and with switches () for switching the resistive elements, in which the switch control logic sets the switches&#x2014;in a first routine for determining the absolute level of signals on the bus by applying a common mode voltage to the bus, by comparing the voltage on a first resistive branch with a reference voltage, by selecting the correct switch settings, and by writing these settings to an internal storage device,&#x2014;and in a second routine for minimizing the mismatch between the two resistive branches by applying a common mode voltage to the bus, by comparing the voltage of the second resistive branch with that of the already trimmed first resistive branch, by selecting the correct switch settings for the second branch, and by writing these settings to an internal storage device. The receiver therefore provides good balancing and common mode rejection.

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Nijmegen, Netherlands

Jelle Nico Wolthek