| 摘要 |
A low clock feed through charge pump circuit applied in a phase includes a first pump transistor, a second pump transistor, a first switch device, a second switch device, a third switch device, a fourth switch device, a first wide-swing current mirror circuit and a second wide-swing current mirror circuit. Each of the first and second wide-swing current mirror circuits consists of four cascode transistor circuits and a bias circuit for providing a bias required by the low clock feed through charge pump circuit. The transistors forming the four switch devices and the four cascode transistor circuits operates in the saturation region. With the low clock through charge pump circuit, charge injection and jitter can be reduced.
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