| 摘要 |
A charge pump having a phase-generator circuit generating phase signals and an oscillator circuit supplying a clock signal, a current-limitation circuit to limit the current flowing in the oscillator circuit, and a control circuit supplying on an output a control signal supplied to the current-limitation circuit. The control circuit has a first current mirror connected to a ground line, a second current mirror connected to a supply line, a cascode structure arranged between the first and the second current mirrors and connected to the output of the control circuit to compensate the effects on the control signal caused by sharp relative variations between the potential of the supply line and the potential of the ground line, and a compensation circuit to compensate the effects on the control signal caused by sharp relative variations between the potential of the supply line and the potential of the ground line and by slow variations in temperature.
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