Patent ID: 11867570
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 and a first body, wherein the first MOS transistor is configured to operate in weak inversion mode with a negative temperature coefficient drain-source resistance;
an output terminal directly electrically connected to the first source and configured to generate a positive temperature coefficient output voltage;
a current source comprising a second MOS transistor having a second drain, a second source, a second gate and a second body, wherein the second gate is directly electrically connected to the output terminal and the first source, the second source is directly electrically connected to a ground node, the second drain is not directly electrically connected to the second gate and the second drain is not directly electrically connected to the output terminal, and wherein the current source is configured to impose a drain-source current of the first MOS transistor;
a bias voltage generator configured to generate a bias voltage; and
wherein the first body is configured to receive the bias voltage, and
wherein the second body is directly electrically connected to a ground node.