Circuit device, oscillator, and manufacturing method
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United States of America Patent
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Jun 11, 2024
Grant Date -
Jun 29, 2023
app pub date -
Dec 22, 2022
filing date -
Dec 27, 2021
priority date (Note) -
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status (Latency Note)
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Abstract
A circuit device includes a waveform-shaping circuit that waveform-shapes an oscillation signal and provides an output clock signal based on a clock signal. A bias voltage output circuit of the circuit device provides a bias voltage of the oscillation signal that is input to the waveform-shaping circuit. A comparator of the circuit device compares a DC voltage obtained by smoothing the clock signal with a reference voltage. A logic circuit of the circuit device sets an adjustment value of the bias voltage. In a test mode of the logic circuit, the logic circuit changes the adjustment value to determine a set value of the adjustment value based on output of the comparator when the adjustment value is changed and stores the determined set value in a storage circuit.
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