Robert Boschgmbh

Franz Schwarz

Bernd Dittmer

Helmut Schneider

Rainer Bitzer

Karl-Heinz Haegele

Thomas Wieja

A data transfer device for unidirectional serial data transfer from a transmitting device to a receiving device, in particular from a microcontroller to an output stage IC of a motor vehicle control unit. The data transfer device includes a P/S converter provided in the transmitting device for converting a parallel data stream made available in the transmitting device into a serial data stream with transfer frames of a predefined format and for transmitting the serial data stream to the receiving device over a data transfer channel. The data transfer device also includes an S/P converter provided in the receiving device for converting the transmitted serial data stream back into a parallel data stream, and a clock signal generating device for generating a clock signal and for sending the clock signal to the P/S converter and the S/P converter to perform the conversion operations continuously and in-phase. In addition, the data transfer device includes a synchronizing device for generating a synchronizing signal according to the conversion operation of the P/S converter and for supplying the same to the S/P converter for synchronizing the conversion operations.

Serial data transfer device

The analyzer circuit includes a first oscillator producing an output signal having a first frequency depending on an inductance of an inductive position sensor having two oscillator coils positioned near a movable part; a switching device in the first oscillator for alternatingly connecting one of the two coils and simultaneously disconnecting the other according to a state of the switching device; a frequency divider for converting the output signal at the first frequency to another output signal at another frequency; a counter for counting a pulse signal under control of the other output signal of the frequency divider; a second oscillator connected to the counter and providing input pulses at a fixed frequency to the counter, which counts the input pulses under control of the other output signal of the frequency divider; a start synchronizing circuit for starting and synchronizing the divider and the counter; a flip-flop connected to the frequency divider and to the switching device to switch the state of the switching device; and an arithmetic-logic unit connected to the counter to receive a count from it and having a device for generating a digital output signal characteristic of a position of the movable part relative to the oscillator coils according to the count.

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Vaihingen, Germany

Franz Schwarz