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    • 7. 发明专利
    • FR2697909B1
    • 1995-02-10
    • FR9312076
    • 1993-10-11
    • BOSCH GMBH ROBERT
    • BITZER RAINERDITTMER BERNDSCHWARZ FRANZHAEGELE KARL-HEINZWIEJA THOMASSCHNEIDER HELMUT
    • G01D5/22G01D5/248G01V3/10H03M1/60G01B7/02G01B7/14
    • 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.