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Applications


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  • The traditional lock-in amplifier have many defects due to using analog technology to achieve coherent modulation which greatly limits the phase-sensitive detector accuracy, and also introduces a lot of background noise.
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  • The basic function of the lock-in amplifier is to extract the target signal from the noisy environment. According to the cause of the noise, it can be roughly divided into two types: the internal noise of the system and the external noise.
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  • The main parameters of lock-in amplifiers include full scale input level, overload, minimum discernible signal, input total dynamic range, output dynamic range and dynamic reserve.
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  • Lock-in amplifier is widely used in temperature detection, photoelectric detection, biological signal detection, geological exploration and so on.
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  • Lock-in amplifiers are used to detect and measure very small AC signals. Accurate measurements may be made even when the small signal is obscured by noise sources many thousands of times larger.
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  • There are two basic methods for connecting a voltage signal to the lock-in amplifier- the single-ended connection is more convenient while the differential connection eliminates spurious pick-up more effectively.