Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
CAPACITIVE SENSOR DEVICE WITH ASSOCIATED EVALUATION CIRCUIT
A capacitive sensor device includes a sensor electrode coupled to a first switch and coupleable either to a sensor operating voltage or to an evaluation circuit, configured as a power source circuit. A first current path is coupleable to the sensor electrode at an input end and to ground via a collector and emitter of a first transistor by an auxiliary resistor. A second current path is coupled to a reference potential at one end. A capacitor is coupled between the reference potential and a second transistor. A second auxiliary resistor is arranged in the second current path. The first transistor's base and collector are coupled to the base of the second transistor. A compensation capacitor has a first terminal coupled to the first current path and a second terminal couplable to a compensation voltage, to ground, or in a floating manner via a second switch.
CAPACITIVE SENSOR DEVICE WITH ASSOCIATED EVALUATION CIRCUIT
A capacitive sensor device includes a sensor electrode coupled to a first switch and coupleable either to a sensor operating voltage or to an evaluation circuit, configured as a power source circuit. A first current path is coupleable to the sensor electrode at an input end and to ground via a collector and emitter of a first transistor by an auxiliary resistor. A second current path is coupled to a reference potential at one end. A capacitor is coupled between the reference potential and a second transistor. A second auxiliary resistor is arranged in the second current path. The first transistor's base and collector are coupled to the base of the second transistor. A compensation capacitor has a first terminal coupled to the first current path and a second terminal couplable to a compensation voltage, to ground, or in a floating manner via a second switch.
CAPACITIVE SENSOR DEVICE WITH ASSOCIATED EVALUATION CIRCUIT
SIEG BERTHOLD (Autor:in)
19.11.2015
Patent
Elektronische Ressource
Englisch
Capacitive sensor device with associated evaluation circuit
| Europäisches Patentamt | 2017
CAPACITIVE PROXIMITY SENSOR AND DOOR HANDLE DEVICE COMPRISING THE CAPACITIVE PROXIMITY SENSOR
| Europäisches Patentamt | 2017
Capacitive proximity sensor and door handle device comprising the capacitive proximity sensor
| Europäisches Patentamt | 2019
Capacitive proximity sensor and door handle device comprising the capacitive proximity sensor
| Europäisches Patentamt | 2018
Capacitive proximity sensor and door handle device comprising the capacitive proximity sensor
| Europäisches Patentamt | 2019