Auswertungs- und Steuereinheit für einen Gassensor

Details

Veröffentlichungs-Nr.

EP3875951

Aktenzeichen

EP20161475

Anmeldetag

6. März 2020

Veröffentlichung

3. Dezember 2025

Erteilung

3. Dezember 2025

Rechtsraum

EP

IPC

G01N27/417

Abstract

An evaluation and control unit (100) for a broadband lambda probe (200) and a method for operating the same are disclosed. The evaluation and control unit (100) comprises pins (RE, IPE, APE, MES) connectable to electrical wires (201, 202, 203, 204) of electrochemical cells (210, 211) of the broadband lambda probe (200), a controller (103), a ASIC reference potential source (102), wherein the ASIC reference potential source (102) is operable by means of the controller (103), a switch assembly (104) connected to each of the pins (RE, IPE, APE, MES), wherein the switch assembly (104) comprises a first transistor (Twire) and a second transistor (T<ECU>), wherein the switch reference potential source (105) is connected to a gate side of the first and second transistors (T<Wire>, T<ECU>), wherein the controller (103) is configured to vary the switch reference potential (Vsw) applied to the gate side of the first and second transistors (T<Wire>, T<ECU>), wherein the switch assembly (104) is configured to allow a limiting current flowing to the drain side of the first transistor (T<Wire>) from the ASIC reference potential if the potential at the gate side of the first and second transistors (T<Wire>, T<ECU>) is at a predetermined voltage between values of an open and closed switch.

Anmelder

Firmen

Robert Bosch GmbH
Melexis Technologies NV

Land

🇩🇪 Deutschland

Fachgebiete