DOORBELL DEVICE
First Claim
1. A doorbell device, comprising:
- a user interface, comprising a button;
a control circuit, coupled to the user interface, for generating a power control signal according to a state of the button;
a power switching circuit, coupled to the control circuit, for outputting a first voltage signal at a first node to supply power to the control circuit according to the power control signal;
a first capacitor, coupled to the first node;
a second capacitor; and
a charge/discharge control circuit, coupled between the first node and the second capacitor, for controlling whether the second capacitor is charged or discharged according to the first voltage signal.
1 Assignment
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Accused Products
Abstract
A doorbell device is provided. The doorbell device includes a user interface, a control circuit, a power switching circuit, a first capacitor, a second capacitor, and a charge/discharge control circuit. The user interface includes a button. The control circuit is coupled to the user interface and generates a power control signal according to a state of the button. The power switching circuit is coupled to the control circuit and outputs a first voltage signal at a first node to supply power to the control circuit according to the power control signal. The first capacitor is coupled to the first node. The charge/discharge control circuit is coupled between the first node and the second capacitor and controls whether the second capacitor is charged or discharged according to the first voltage signal.
39 Citations
14 Claims
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1. A doorbell device, comprising:
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a user interface, comprising a button; a control circuit, coupled to the user interface, for generating a power control signal according to a state of the button; a power switching circuit, coupled to the control circuit, for outputting a first voltage signal at a first node to supply power to the control circuit according to the power control signal; a first capacitor, coupled to the first node; a second capacitor; and a charge/discharge control circuit, coupled between the first node and the second capacitor, for controlling whether the second capacitor is charged or discharged according to the first voltage signal. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A doorbell device, comprising:
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a user interface, comprising a button; a control circuit, coupled to the user interface, for generating a power control signal according to a state of the button; a power switching circuit, coupled to the control circuit, for outputting a first voltage signal at a first node according to the power control signal; a first buck converter, coupled between the first node and the control circuit, for converting the first voltage signal down to a second voltage signal to supply power to the control circuit; a first capacitor, coupled to the first node; a second capacitor; and a charge/discharge control circuit, coupled between the first node and the second capacitor, for controlling whether the second capacitor is charged or discharged according to the first voltage signal. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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Specification