Patent ID: 11920989
Assignee: STMICROELECTRONICS S.R.L.
Field: Measurement (Instruments)
Classification: CPC G  H | IPC G  H

Claim 0:
1. A temperature sensing circuit, comprising:
a thermistor comprising a first MOS transistor having a first drain, a first source, a first gate, a first body and a first back gate, wherein the first MOS transistor is configured to operate in weak inversion mode with a negative temperature coefficient drain-source resistance;
an output terminal coupled to the first source and configured to generate a positive temperature coefficient output voltage; and
a current source comprising a second MOS transistor having a second drain, a second source, a second gate, a second body and a second back gate, wherein the second gate is coupled to the first source and configured to impose a drain-source current of the first MOS transistor; and
wherein the first body and second body are floating, and
wherein the first back gate and the second back gate are directly electrically connected to a ground node.