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US 8,618,785 B2Granted
Start-up supply
AssigneeMarvell World Trade Ltd.
InventorRajesh Tiruvuru
Life of this patent
Estimating the term…
Abstract
In one embodiment, an apparatus includes a transistor having a gate, a drain, and a source. The drain is coupled to receive an AC power supply signal. A component is coupled between an output node and the gate of the transistor. The component couples an output voltage from the output node to charge a gate-source capacitor during a first portion of the AC power supply signal. The transistor is configured to turn on during a second portion of the AC power supply signal to send a charge to the output node where the charge is used to power a circuit of a power supply.
Claims20
An apparatus comprising:
- a transistor having a gate, a drain, and a source, wherein the drain is coupled to receive an alternating current (AC) power supply signal;
- and
- a component coupled between an output node and the gate of the transistor, wherein the component couples an output voltage from the output node to charge a gate-source capacitor during a first portion of the AC power supply signal,
- wherein the transistor is configured to turn on during a second portion of the AC power supply signal to send a charge to the output node, the charge used to power a circuit of a power supply.
1 more element
A method comprising:
- coupling an AC power supply signal to a transistor;
- coupling, via a component, an output voltage from an output node to a gate of the transistor to charge a gate-source capacitor;
- and
- turning the transistor on to send a charge to the output node, the charge used to power a circuit of a power supply.
1 more element
Dependencies are inferred from the claim text.