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AssigneeuPI Semiconductor Corp.
InventorsChih-Lien CHANG, Pei-Ling HONG, Min-Rui LAI
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A current mirror calibration circuit, coupled to an error amplifier of a pulse-width modulation controller, includes a first voltage generation unit, a second voltage generation unit, a calibration unit and a current mirror circuit. During an initial period, the first voltage generation unit and second voltage generation unit provide a first default voltage and a second default voltage respectively. The current mirror circuit includes a first current unit and a second current unit. The first current unit receives an original current. The second current unit generates a mirror current having a proportional relationship with original current. The first current unit has a first node coupled to the first voltage generation unit and a second node coupled to a third default voltage. The second current unit has a third node coupled to the second voltage generation unit and calibration unit and a fourth node coupled to calibration unit and an output terminal of error amplifier.
A current mirror calibration circuit, coupled to an error amplifier of a pulse-width modulation (PWM) controller, comprising:
A current mirror calibration method, used to calibrate a current mirror circuit, the current mirror circuit being coupled to an error amplifier of a pulse-width modulation (PWM) controller, the current mirror circuit comprising a first current unit and a second current unit, the first current unit having a first node and a second node, the second current unit having a third node and a fourth node, the fourth node being coupled to an input terminal of the error amplifier, the current mirror calibration method comprising:
Dependencies are inferred from the claim text.