SPREAD SPECTRUM CLOCK GENERATION CIRCUIT
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United States of America
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Issued Date -
Apr 3, 2025
app pub date -
Sep 25, 2024
filing date -
Sep 25, 2024
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Abstract
A flash memory is a memory element that stores a trimming code for adjusting a resistance value of a trimming resistor so that an oscillation frequency of an output clock signal generated by a CR oscillator circuit becomes a preset frequency. The CR oscillator circuit generates the output clock signal having a frequency based on a time constant determined by a resistance value of the trimming resistor being a resistive element, and a capacitance value of a capacitive element. An up-down counter is a counter circuit that, in synchronization with the output clock signal generated by the CR oscillator circuit, increases or decreases the trimming code stored in the flash memory, and outputs the trimming code as a trimming code for adjusting the resistance value of the trimming resistor.
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