Importance

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Abstract

In some examples, an apparatus includes a tuning circuit having a tuning output and first, second, third, fourth, and fifth tuning inputs, wherein the first tuning input is coupled to a sensor input terminal, the second tuning input is coupled to a first sensor threshold terminal, and the third tuning input is coupled to a second sensor threshold terminal, an avalanche diode having a first anode and a first cathode, wherein the first cathode is coupled to a power terminal, and the first anode is coupled to the fourth tuning input, a diode having a second anode and a second cathode, a transistor coupled between the power terminal and the second anode and having a control terminal coupled to the tuning output, and a timeout circuit having a timeout input coupled to the tuning output, and a timeout output coupled to the fifth tuning input.

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First Claim