| 摘要 |
A boot-strapped current switch is provided that includes a biasing network, a control signal, a transistor, a control switch and a boot-strappi ng circuit. The biasing network generates a substantially constant voltage on a biasing network output. The transistor has a control terminal, a first curre nt- carrying terminal, and a second current-carrying terminal, wherein the first current-carrying terminal generates the output current of the current mirror , and the second current-carrying terminal is coupled to a first potential. Th e control switch is coupled between the biasing network output and the control terminal of the transistor, and is also coupled to the control signal. The control switch couples the first biasing network output to the control terminal of t he transistor when the control signal is in a first state. The boot-strapping circuit is coupled between the control terminal of the transistor and a second potential, and is also coupled to the control signal. The first boot-strappi ng circuit injects the second potential onto the control terminal of the transistor when the control signal transitions from a second state to the first state i n order to decrease the turn-on time of the transistor.
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