| 摘要 |
A system for signal acquisition in a distance meter includes at least one photoelectric receiver that detects electromagnetic radiation that is high-frequency modulated via a modulation frequency and converts the same to high-frequency electrical signals (HF). A device is provided for transforming the high-frequency electrical signals (HF) supplied by the photoelectric receiver into low-frequency measuring signals (NF) that can be passed on to a signal-processing unit mounted downstream of the device. The device for transforming the high-frequency electrical signals (HF) supplied by the photoelectric receiver into low-frequency measuring signals (NF) can include at least one switch whose switching frequency is controlled by a control frequency (F) whose frequency is higher or lower than the modulation frequency by the amount of the low-frequency measuring signal. The high-frequency actuated switch is linked with a capacitor mounted down-stream thereof to which a transimpedance amplifier is connected, at whose output the low-frequency measuring signal (NF) is available when the device is operational.
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