RC OSCILLATOR CIRCUIT
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United States of America
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Issued Date -
Apr 10, 2025
app pub date -
Dec 17, 2024
filing date -
Dec 17, 2024
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Abstract
An RC oscillator circuit is provided. An output terminal of the first current source unit is connected to the oscillation resistor and non-inverting inputs of the comparators, and the other end of the oscillation resistor is grounded. The second current source unit has two output terminals. Sources of the two oscillation MOS transistors are grounded, drains of the oscillation MOS transistors are connected to a corresponding oscillation capacitor, and gates of the oscillation MOS transistors are connected to an output of the RS latch. The first current source unit includes four MOS transistors and a first resistor. The frequency of the output clock signal is unaffected by substrate bias effects of MOS transistors and resistor variations, thereby ensuring a highly stable output frequency with minimal deviation, and greatly improving the reliability and stability of the RC oscillator circuit.
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