Temperaturfühlschaltung

Details

Veröffentlichungs-Nr.

EP4779277

Anmeldetag

20. Januar 2025

Veröffentlichung

22. Juli 2026

Rechtsraum

EP

Abstract

A temperature-sensing-circuit comprising: an analogue-to-digital-converter; a first-active-device defining a first-current-density when receiving a first-current; a second-active-device defining a second-current-density when receiving a second-current (being different to the first-current-density); a comparison-block to provide a difference-signal to the analogue-to-digital-converter, representing a difference between a voltage-drop across the first-active-device and a voltage-drop across the second-active-device; a satellite-active-device defining a satellite-current-density when receiving a satellite-current; a multiplexer comprising: a first-input-terminal to receive the voltage-drop across the first-active-device; a satellite-input-terminal to receive a voltage-drop across the satellite-active-device; and an output-terminal to provide one of the received signals to the analogue-to-digital-converter; and a controller configured to: cause the multiplexer to provide the voltage-drop across the first-active-device, so the analogue-to-digital-converter provides a reference-ratio-signal (a ratio between the difference-signal and the voltage-drop across the first-active-device); cause the multiplexer to provide the voltage-drop across the satellite-active-device so the analogue-to-digital-converter provides a satellite-ratio-signal (a ratio between the difference-signal and the voltage-drop across the satellite-active-device); and determine a temperature difference between the first-active-device and the satellite-active-device from a comparison between the reference-ratio-signal and the satellite-ratio-signal.

Anmelder

Firma

NXP B.V.

Land

🇳🇱 Niederlande