Enabling an external resistor for an oscillator
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United States of America Patent
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Dec 19, 2023
Grant Date -
Oct 27, 2022
app pub date -
Oct 25, 2021
filing date -
Apr 22, 2021
priority date (Note) -
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Abstract
In an example, a system includes an oscillator circuit on a chip. The oscillator circuit includes a charging current generator including a current mirror, an amplifier, and an on-chip resistor, where the on-chip resistor is coupled to a pin on the chip. The oscillator circuit also includes oscillator circuitry coupled to the charging current generator, where the oscillator circuitry includes a comparator, a phase generator, a first capacitor coupled to a first resistor, and a second capacitor coupled to a second resistor. The system also includes an external resistor coupled to the pin, where the external resistor is external to the chip. The system includes an external capacitor coupled to the pin, where the external capacitor is external to the chip.
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