发明授权
US07271626B1 Suppression of parasitic ringing at the output of a switched capacitor DC/DC converter 有权
在开关电容器DC / DC转换器的输出端抑制寄生振荡

Suppression of parasitic ringing at the output of a switched capacitor DC/DC converter
摘要:
A multi-stage transistor circuit is provided in which the multiple transistor stages are coupled in parallel and switched individually in sequence by a series arrangement of buffers. Each buffer drives the gate of a corresponding stage of the multi-stage transistor circuit with a gating signal that is delayed by each buffer. Optionally, the voltage of the gating signal can be varied. Each transistor stage may comprise one or more transistors in parallel. A switched capacitor DC/DC converter incorporating the multi-stage transistor circuit is provided in which parasitic ringing at the output is substantially reduced or eliminated. Additionally, the multi-stage transistor circuit is well suited for implementing an adaptive non-overlapping gating signal generator for complementarily driving a series arrangement of multi-stage transistors. An adaptive gating signal generator incorporating the multi-stage transistor circuit provides the minimum dead time between the gating signals that will ensure under all conditions that the multi-stage transistors will not be on at the same time.
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