Active stylus, boost circuit, and control method therefor
A boost circuit includes: an inductor, a switch module, a capacitor and a control module. The switch module includes at least a first switch and a second switch. The capacitor and the second switch are connected in parallel. A first terminal of the first switch is connected to one terminal of the in...
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| Format: | Patent |
| Sprache: | eng |
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| Zusammenfassung: | A boost circuit includes: an inductor, a switch module, a capacitor and a control module. The switch module includes at least a first switch and a second switch. The capacitor and the second switch are connected in parallel. A first terminal of the first switch is connected to one terminal of the inductor. A second terminal of the first switch is connected to a first terminal of the second switch. A second terminal of the second switch is grounded. The other terminal of the inductor is configured to connect a power supply. The control module is connected to a control terminal of the switch module. The control module is configured to control states of the switches in the switch module, to enable the first terminal of the second switch to output a voltage signal with a preset frequency and amplitude. |
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