| 摘要 |
A control circuit for providing command signals to a clock generator includes: a voltage input terminal, a voltage output terminal, a voltage control terminal, a transistor, a first resistor, and a second resistor. The first and second resistors are connected in series between the voltage input terminal and ground. The transistor has a base connected to a node between the first and second resistors, an emitter coupled to the voltage control terminal, and a collector coupled to the voltage input terminal and also coupled to the voltage output terminal. The voltage output terminal outputs the command signal to the clock generator. The control circuit needs no further transistor, and is relatively inexpensive.
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