Control input circuit for an electrical device
First Claim
1. A control input circuit for an electrical appliance, comprising:
- a constant current sink, connected into a control line, whose drawn current assumes a detection value during the length of a detection pulse, the drawn current being lowered between two successive detection pulses; and
an evaluation module that analyzes the input current flowing in the control line and indicates a control signal if during the detection pulse, the input current is not below a prescribed value for a prescribed period.
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Accused Products
Abstract
A control input of an electrical device is disclosed, which is resistant to parasitic currents and which is especially suitable for a large bandwidth of various driving voltages. For this purpose, a control input circuit includes a constant current sink connected to a control line, whose current consumption during the duration of the detection pulse assumes a detection value relative which the power consumption between two successive detection pulses is reduced. The circuit also includes an evaluation module that analyzes the input current flowing in the control line and that indicates a control signal if, during the detection pulse, the input current does not fall below a predetermined switch-on value for a predetermined duty cycle.
12 Citations
21 Claims
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1. A control input circuit for an electrical appliance, comprising:
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a constant current sink, connected into a control line, whose drawn current assumes a detection value during the length of a detection pulse, the drawn current being lowered between two successive detection pulses; and an evaluation module that analyzes the input current flowing in the control line and indicates a control signal if during the detection pulse, the input current is not below a prescribed value for a prescribed period. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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Specification