Voltage Generator and Biasing Thereof
AssigneeInfineon Technologies AG
InventorsElmar Bach, Christian Ebner
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Abstract
In accordance with an embodiment of the present invention, a method of operating a voltage generator includes providing a bypass switch to bypass a ripple filter coupled to a power converter. A coupling capacitor includes a first plate and a second plate. The first plate is coupled to a control node of the bypass switch. A bypass control signal is received. The control node of the bypass switch is toggled between a first voltage to a second voltage different from the first voltage by toggling the second plate of the coupling capacitor based on the bypass control signal.
Claims31
A method of operating a voltage generator comprising:
- providing a bypass switch to bypass a ripple filter coupled to a power converter;
- providing a coupling capacitor comprising a first plate and a second plate, the first plate coupled to a control node of the bypass switch;
- receiving a bypass control signal;
- and
- toggling the control node of the bypass switch between a first voltage to a second voltage different from the first voltage by toggling the second plate of the coupling capacitor based on the bypass control signal.
A voltage generator comprising:
- a multi-stage charge pump circuit comprising a high voltage output node to output a high voltage and an intermediate voltage output node to output an intermediate voltage;
- a ripple filter coupled between the high voltage output node of the multi-stage charge pump circuit and an output node of the voltage generator;
- a bypass switch coupled to the ripple filter, the bypass switch coupled between the high voltage output node of the multi-stage charge pump circuit and the output node of the voltage generator;
- and
- a capacitive coupling circuit to enable and disable the bypass switch, the capacitive coupling circuit being coupled to the multi-stage charge pump circuit in a high voltage regime, and configured to receive a bypass control signal in a low voltage regime.
An electronic device comprising:
- a voltage generator configured to output a voltage higher than a supply voltage at an output node, wherein all devices in the voltage generator comprise standard CMOS devices;
- and
- a MEMS microphone coupled to the output node of the voltage generator.
Dependencies are inferred from the claim text.