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Power switch circuit of time calibration instrument
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Wireless temperature measuring sensor
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High-precision frequency standard source
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Detection circuit for detecting power frequency output frequency
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Multi-power source sensor power supply device
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Contact input interface circuit
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Circuit for extracting square wave signal corresponding to high-amplitude sine wave
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Circuit for extracting square wave signal
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Storage battery management circuit for synchronous calibration instrument
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Electrical independent contact output interface circuit with strong interference resistance
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Compensating circuit for high-frequency video signal
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Signal amplifying circuit used for satellite voice frequency
