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1. (WO1998015062) CIRCUIT FOR BINARY EVALUATION OF AN ANALOGUE VOLTAGE SIGNAL

Pub. No.:    WO/1998/015062    International Application No.:    PCT/DE1997/002107
Publication Date: Apr 9, 1998 International Filing Date: Sep 18, 1997
IPC: H03M 1/48
Applicants: SIEMENS AKTIENGESELLSCHAFT
CUYLEN, Michael
Inventors: CUYLEN, Michael
Title: CIRCUIT FOR BINARY EVALUATION OF AN ANALOGUE VOLTAGE SIGNAL
Abstract:
This invention concerns a circuit which has: an analogue comparator (K) which produces a logical comparative signal (AI) out of the analogue voltage signal (UE) and an analogue servo signal (UV); a first pulse-controlled flip-flop (FF1) to which the logical comparative signal (AI) is directed and which emits a pulsed comparative signal (AO) at output (Q1); a servo circuit (N) which forms an analogue servo signal (UV) corresponding to the analogue voltage signal (UE) out of the pulsed comparative signal (AO); and a logical switching circuit (EC). This logical switching circuit (EC) builds a binary evaluation signal (A>, A<, A<>) out of the pulsed comparative signal (AO) which signals voltage changes of the analogue voltage signal (UE). The advantage lies in the production of binary evaluation signals by means of which any change in an analogue voltage signal or of its direction of change can be established. It is thus possible to feed a digitized voltage value of the analogue voltage signal to, for example, a downstream process control only if a change could be detected.