초록 ▼

A charge pump circuit may have multiple charge pumps. Each charge pump may have an output. The outputs of the charge pumps may be connected to a common output terminal for the charge pump circuit. The charge pump circuit may produce an output voltage at the output terminal. The output voltage may be

A charge pump circuit may have multiple charge pumps. Each charge pump may have an output. The outputs of the charge pumps may be connected to a common output terminal for the charge pump circuit. The charge pump circuit may produce an output voltage at the output terminal. The output voltage may be monitored by a charge pump regulator circuit. The charge pump regulator circuit may produce a control signal based on the measured output voltage. The control signal may be processed by register and logic gating circuitry and may be used to generate a sequential set of slave charge pump enable signals. The slave charge pump enable signals may be used to sequentially enable the charge pumps to progressively increase the strength of the charge pump while exhibiting reduced ripple.

대표청구항 ▼

What is claimed is: 1. A charge pump circuit, comprising:a charge pump circuit output operable to output an output voltage;a plurality of charge pumps each having a respective charge pump output coupled to the charge pump circuit output; andcircuitry operable to turn on charge pumps of the plurality

What is claimed is: 1. A charge pump circuit, comprising:a charge pump circuit output operable to output an output voltage;a plurality of charge pumps each having a respective charge pump output coupled to the charge pump circuit output; andcircuitry operable to turn on charge pumps of the plurality of charge pumps sequentially in response to feedback associated with the output voltage, wherein each charge pump in the plurality of charge pumps has:a respective local charge pump regulator circuit that includes a comparator and that is operable to receive a local feedback signal based on the output voltage; andan associated oscillator that is controllable by an associated logic gate that comprises a first input operable to receive an output from the comparator in the respective local charge pump regulator circuit and comprises a second input that is operable to receive a global enable signal.