| 摘要 |
Phase locked loop charge pump comprising a drain node (A, B) and at least a cascode transistor (M 4 , M 6 ) for limiting the variation of the voltage of said drain node, characterized in that an intermediate switch transistor (M 3 , M 5 ) is placed between the drain node (A, B) and the cascode transistor (M 4 , M 6 ).
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