US 2018/0006556 A1 · THERMAL SENSOR CIRCUIT

Abstract

A thermal sensor circuit comprises a conversion circuit which is one of a buck DC-DC converter circuit and a boost DC-DC converter circuit, wherein the conversion circuit comprises an inductor and an output terminal. A thermal sensor senses a thermal variation correlated to a capacitance variation of the thermal sensor. The capacitance variation induces an internal parasitic capacitance variation of the inductor which is connected in parallel to the thermal sensor and results a variation of an energy stored in the inductor. Hence a variation of a converted circuit signal outputting by the output terminal is caused, wherein the variation of the converted circuit signal is correlated to the thermal variation.

Claims10

Dependent claims

A thermal sensor circuit comprising:

a conversion circuit, wherein said conversion circuit is one selected from the group consisting of a buck DC-DC converter circuit and a boost DC-DC converter circuit, wherein said conversion circuit comprises:
an inductor, wherein said inductor is connected in parallel to a thermal sensor;
and
an output terminal of said conversion circuit for outputting a converted circuit signal;
wherein said thermal sensor senses a thermal variation correlated to a capacitance variation of said thermal sensor, wherein said capacitance variation of said thermal sensor induces a variation of an internal parasitic capacitance of said inductor causing a variation of an energy stored in said inductor, thereby said variation of said energy stored in said inductor causes a variation of said converted circuit signal, hence said variation of said converted circuit signal is correlated to said thermal variation.

2 more elements

Dependencies are inferred from the claim text.

Thermal sensor circuit

Life of this patent

Thermal sensor circuit

Life of this patent

Abstract

Claims10