System and method for evaluating a module

摘要

In one embodiment, a system comprises a circuit arrangement and a module having a first mechanical switch and an electrode. The circuit arrangement has a terminal that is connected to the module, a drive unit that is connected to the terminal and serves to provide a drive signal, a first evaluation unit that is connected to the terminal and serves for key detection, as well as a second evaluation unit that is connected to the first evaluation unit and serves for proximity detection. Therein the drive signal is designed for driving an electrode of a capacitive proximity sensor in the module, the first evaluation unit is designed to provide a touch signal according to an actuation of the module by a person, and the second evaluation unit is designed to provide a proximity signal according to an approach of a person to the module.

主权项

1. A system, having
a module (M) comprising a first mechanical switch (S1) and an electrode (E1), and a circuit arrangement (8) having
a terminal (9) that is connected to the module (M),a drive unit (A) for providing a drive signal (Sa), the drive unit (A) being connected to the terminal (9),a first evaluation unit (B) for key detection, the first evaluation unit (B) being connected to the terminal (9), anda second evaluation unit (C) for proximity detection, the second evaluation unit (C) being connected to the first evaluation unit (B), wherein the drive signal (Sa) is designed for driving the electrode (E1) of the module (M) as an electrode of a capacitive proximity sensor, wherein the first evaluation unit (B) is designed to provide a touch signal (Sb) as a function of an actuation of the module (M) by a person, wherein the second evaluation unit (C) is designed to provide a proximity signal (Sc) as a function of the approach of a person to the module (M), wherein one contact of the first mechanical switch (S1) of the module (M) is electrically connected to the electrode (E1) of the module (M), wherein the capacitive proximity sensor of the module (M) is realized in the form of the contact of the first mechanical switch (S1), and wherein the first mechanical switch (S1) and the electrode (E1) of the module (M) are directly connected to one another.