Method and circuit arrangement for preventing the stand-by discharge of a battery-powered signal evaluation circuit of a sensor
AssigneeMiele & Cie. KG
InventorsAndre Bertram, Guenther Ennen, Stefan Tiekoetter
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Abstract
A circuit arrangement for preventing the discharge of a battery powering a signal evaluation circuit while the circuit is in a stand-by mode, provided with a sensor for generating signals and means responsive to the generation of signals for connecting the battery to the signal evaluation circuit and for disconnecting the battery in the absence of signals. The signal responsive means include an amplifier for triggering a monostable flip flop the output of which controls the conductivity of a transistor between the battery and the signal evaluation circuit.
Claims15
A method of preventing the discharge of a battery during intermittent stand-by modes of a signal evaluation circuit, comprising the steps of:
- generating signals derived from a sensor;
- feeding the signals to a power supply switching circuit;
- switching the power supply switching circuit in response to the signals to connect the battery to the signal evaluation circuit and to disconnect the battery in the absence of the signals.
A circuit arrangement for preventing, during a stand-by mode of a signal evaluation circuit, the discharge of a battery energizing the evaluation circuit, comprising:
- a sensor for selectively generating signals;
- a power supply switching circuit connected to the battery and responsive to generated signals to connect the battery to the signal evaluation circuit and to disconnect the battery from the signal evaluation circuit in the absence of signals.
Dependencies are inferred from the claim text.