Back to results
US 2011/0254529 A1Published application
Voltage converter
AssigneeNXP B.V.
InventorBram van Straaten
Life of this patent
Estimating the term…
Abstract
A voltage converter comprises at least two capacitive charge pump stages, each comprising a capacitor, a charging switch through which a capacitor charging current is adapted to flow, and a control circuit for controlling the charging switch. wherein the control circuit for at least one charge pump stage comprises current limiting means for limiting the current through the charging switch. By limiting the current flowing through the switch, current spikes are avoided, which reduces high frequency distortion.
Claims14
A voltage converter comprising;
- at least two capacitive charge pump stages, including a capacitor, a charging switch through which a capacitor charging current is adapted to flow, and a control circuit for controlling the charging switch, the control circuit for at least one said charge pump stage having a current limiter for limiting the current through the charging switch.
A voltage conversion method comprising:
- operating at least two capacitive charge pump stages, each including a capacitor, a charging switch through which a capacitor charging current is adapted to flow, and a control circuit for controlling the charging switch, and
- limiting the current through the charging switch.
Dependencies are inferred from the claim text.