4. Electricity: measuring and testing
  5. Measuring, testing, or sensing electricity, per se
  6. Frequency of cyclic current or voltage

Michael J. Underhill

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Digital phase comparator

Patent

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Digital phase comparison apparatus

Oscillators – Relaxation oscillators
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Electronic analog switching device

Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons
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Frequency modulation using a phase modulator

Modulators – Amplitude modulator – Nonlinear device controlled by modulating signal
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Frequency synthesizer

Registers – Coded record sensors – Particular sensor structure
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Profile ID: LFUS-PAI-P-349636

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