Circuit for determining and evaluating a data signal on which a direct voltage portion is superposed
First Claim
Patent Images
1. A circuit for determining and evaluating a data signal which a direct voltage portion is superposed, comprising:
- a signal input that receives a signal;
a signal processor having a filter and that forwards a part of the received signal;
an evaluator means that compares the received signal from the signal input with the part of the signal forwarded by the signal processor, and that determines a data signal;
the signal processor having a time constant controller that is controlled in dependence on a signal preceding the filter, and the signal processor also having a track and hold circuit.
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Abstract
A circuit for determining and evaluating a data signal with a disturbing direct voltage portion has a signal processor with which the direct voltage portion is determined and then subtracted from the signal. A non-linear control is provided that changes a time constant of the circuit in dependence on the signal curve.
11 Citations
11 Claims
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1. A circuit for determining and evaluating a data signal which a direct voltage portion is superposed, comprising:
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a signal input that receives a signal; a signal processor having a filter and that forwards a part of the received signal; an evaluator means that compares the received signal from the signal input with the part of the signal forwarded by the signal processor, and that determines a data signal; the signal processor having a time constant controller that is controlled in dependence on a signal preceding the filter, and the signal processor also having a track and hold circuit. - View Dependent Claims (2)
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3. A circuit for determining and evaluating a data signal on which a direct voltage portion is superposed, comprising:
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a signal input that receives a signal; a signal processor having a filter and that forwards a part of the received signal; an evaluator means that compares the received signal from the signal input with the part of the signal forwarded by the signal processor, and that determines a data signal; the signal processor having a time constant controller that is controlled in dependence on a signal preceding the filter; the time constant controller having a controllable resistance; the time constant controller also having a control unit that evaluates a difference voltage and that has a connection to the controllable resistance. - View Dependent Claims (4)
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5. A method for determining and evaluating a data signal on which a direct voltage portion is superposed, comprising the steps of:
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providing an input signal; providing a signal processor that has a filter and that forwards a part of the input signal; and providing an evaluator that compares the input signal to the part of the signal forwarded by the signal processor, and that determines a data signal; providing in the signal processor a time constant controller that is controlled in dependence on a signal preceding the filter; measuring a difference voltage with a control unit; and controlling the time constant controller in a non-linear fashion, in order to set a large time constant given small difference voltages and to set a small time constant given large difference voltages.
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6. A circuit for determining and evaluating a data signal on which a direct voltage portion is superposed, comprising:
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a signal input that receives a signal; a signal processor having a filter and that forwards a part of the received signal; and an evaluator means that compares the received signal from the signal input with the part of the signal forwarded by the signal processor, and that determines a data signal; the signal processor having a time constant controller that is controlled in dependence on a signal preceding the filter; the time constant controller having a controllable resistance; the time constant controller also having a control unit that evaluates a difference voltage and that has a connection to the controllable resistance; and the control unit having a memory for storing a comparison voltage. - View Dependent Claims (7, 8, 9, 10, 11)
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Specification