Verfahren zum Analog-/Digital-Wandeln eines elektrischen Signals und Vorrichtung zur Durchführung des Verfahrens

摘要

The proposal is for a process for the analog/digital conversion of an electric signal and a device for implementing it. In the process of the invention, the time (TH, TL) is found which, starting from a voltage (Ux) to be transformed, is needed to charge or discharge an RC circuit (10, 12) to a predetermined reference voltage, e.g. a switching threshold (SH, SL) of a comparator (14). In the device of the invention, there is a selector (13), the comparator (14) and a time detector (15) in a microprocessor which is fitted with the RC circuit (10, 12) and possibly with an input resistor (11). The process and device of the invention are particularly easy to make and are particularly suitable for use with a microprocessor (17) without an integrated analog/digital converter.