Limit swing charge pump and method thereof
AssigneeMarvell International Ltd.
InventorsJun Ming, Randy Tsang, Lawrence Tse
Life of this patent
Estimating the term…
Abstract
A charge pump comprising a charge pump core including output switches. The charge pump core, in response to a drive signal, to generate a charge pump output. A limit swing generator, in response to an input signal, to generate the drive signal to control the charge pump core. The drive signal having voltage levels including a high level and a low level. The limit swing generator including at least one voltage generator to control the voltage levels of the drive signal such that the drive signal tracks a process variable of the output switches. The at least one voltage generator including at least one diode or diode connected device.
Claims20
A charge pump comprising:
- a charge pump core including output switches, in response to a drive signal, to generate a charge pump output;
- a limit swing generator, in response to an input signal, to generate the drive signal to control the charge pump core, the drive signal having voltage levels including a high level and a low level, the limit swing generator including at least one voltage generator to control the voltage levels of the drive signal such that the drive signal tracks a parametric variable of the output switches;
- and
- the at least one voltage generator including at least one diode connected device.
A charge pump comprising:
- means for generating a charge pump output in response to a drive signal;
- means for generating a drive signal in response to an input signal, the drive signal to control the charge pump generating means, the drive signal having voltage levels including a high level and a low level, the drive signal generating means including at least one means for generating voltage to control the voltage levels of the drive signal such that the drive signal tracks a parametric variable of the charge pump output generating means;
- and
- the at least one voltage generating means including at least one diode connected device.
A method for generating a regulated voltage, comprising:
- providing an output circuit to generate an output voltage from first and second voltages;
- generating a drive signal to control the output circuit, the drive signal having first and second voltage levels;
- controlling the output circuit as a function of the drive signal;
- controlling the drive signal first and second voltage levels to compensate for parametric changes in the output circuit;
- generating the drive signal includes generating a first current;
- supplying the first current to at least one series diode connected device such that a voltage is developed across the at least one diode connected device;
- and
- setting at least one of the voltage levels using the voltage developed across the at least one series diode connected device.
Dependencies are inferred from the claim text.