OSCILLATION CIRCUIT AND CIRCUIT SYSTEM USING THE SAME
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United States of America
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Issued Date -
Feb 6, 2025
app pub date -
Dec 18, 2023
filing date -
Dec 18, 2023
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Abstract
An oscillation circuit includes: a current mirror circuit outputting a reference current; a charging and discharging circuit charging a first charge storage element by using one of the reference currents or discharging the first charge storage element, to generate a first control voltage; an output stage circuit including a first switch transistor controlled by the first control voltage to output a first oscillation signal; a first resistor; a second resistor; and a diode circuit. The first resistor and the second resistor have same directional temperature drifts, a first resistance of the first resistor is greater than a second resistance of the second resistor, and a first resistance drift of the first resistor with a temperature variation is smaller than a second resistance drift of the second resistor with the temperature variation, such that the effect of the temperature variation on a frequency accuracy is reduced.
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