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US 2023/0142312 A1Published application
Reference voltage generating system and start-up circuit thereof
AssigneeHimax Technologies Limited
InventorKuan-Hung Chen
Life of this patent
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Abstract
A start-up circuit includes series-connected first-type first transistors through which a start-up current flows in a start-up period, being connected between a positive power voltage and an inner node; and a first-type second transistor through which a boost current flows in the start-up period, being connected between the positive power voltage and the inner node, and with a gate connected to an output node that provides a bias voltage.
Claims15
A reference voltage generating system, comprising:
- a bandgap voltage reference circuit that generates a bandgap voltage;
- a start-up circuit that starts the bandgap voltage reference circuit, the start-up circuit providing a bias voltage at an output node to the bandgap voltage reference circuit, and the bandgap voltage being fed to an input node of the start-up circuit, the start-up circuit including:
- series-connected first-type first transistors through which a start-up current flows in a start-up period, being connected between a positive power voltage and an inner node;
- and
- a first-type second transistor through which a boost current flows in the start-up period, being connected between the positive power voltage and the inner node, and with a gate connected to the output node.
2 more elements
A start-up circuit, comprising:
- series-connected first-type first transistors through which a start-up current flows in a start-up period, being connected between a positive power voltage and an inner node;
- and
- a first-type second transistor through which a boost current flows in the start-up period, being connected between the positive power voltage and the inner node, and with a gate connected to an output node that provides a bias voltage.
Dependencies are inferred from the claim text.