Semiconductor device including a temperature sensor circuit

摘要

A semiconductor device including a temperature sensor includes a pull up circuit, a pull down circuit, a first additional current path, and a second additional current path. The pull up circuit is configured to generate a pull up current that contributes to generation of a first output current. The pull down circuit is operably coupled to the pull up circuit at an output node and configured to generate a pull down current that contributes to generation of a second output current. The first additional current path, when enabled, is configured to combine a first additional current with the pull up current to comprise the first output current. The second additional current path, when enabled, is configured to combine a second additional current with the pull down current to comprise the second output current. Respective enablement of the first additional current path and the second additional current path is complementary.

主权项

1. A semiconductor device, comprising:
a temperature sensor including circuit elements a switch element and an output element, the temperature sensor configured to:
generate a variable pull up output current and a variable pull down output current that vary responsive to temperature change of the circuit elements;alternatingly respectively switch additional pull up current and additional pull down current into the variable pull up output current and the variable pull down output current, respectively, as controlled according to a duty cycle that depends, at least in part, on a comparison of an output voltage to a reference voltage received by a comparator, the output voltage being generated at an output node of the circuit elements by the variable pull up output current and the variable pull down output current; andgenerate a temperature estimate signal indicating a temperature responsive to the comparison of the output voltage to the reference voltage.