Patent ID: 6727985
Filing Date: 2004-04-27
Classification: G01S

Abstract:
A system for signal acquisition in a distance meter, comprising:at least one photoelectric receiver, which detects an electromagnetic beam that is high-frequency modulated via a modulation frequency (M) and converts it into high-frequency electrical signals (HF); and a device having a measuring signal path for transforming the high-frequency electrical signals (HF), furnished by the photoelectric receiver, into low-frequency measuring signals (NFL, NFR), which can be carried onward for evaluation to a signal-processing unit mounted downstream, wherein the transforming device for the high-frequency electrical signals furnished by the photoelectric receiver includes: a switch, whose switching frequency is controlled by a control frequency (F) whose frequency is slightly greater or less than the modulation frequency (M); and a downstream capacitor, which is connected to a transimpedance amplifier at whose output, in operation, the low-frequency measuring signal (NFL, NFR) is present.