The deviation across input and output of an electronic circuit results from the tolerance of its components. In order to eliminate such deviation, Cyntec has developed a full series of sensor for Over-Temperature Protection (OTP) signal circuits. Our sensors for OTP signal circuits are produced with Hybrid Integrated Circuit (HIC) technology, which eliminate components deviation to meet high precision requirement.

The following figure shows the Fixed-Temperature-Enable/Low-Temperature-Disabled circuit. This circuit is basically a Fixed-Temperature-Enabled circuit plus positive feedback resistor whose resistance is taken into account in the circuit calculation. Therefore, output voltage is enabled at temperature T₂ and remains enabled until temperature drops to T₁

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Although known as OTP circuit, this type of circuit can be applied to various applications other than over-temperature protection application.