| 摘要 |
An integrated circuit includes a signal generator that receives an input signal having a frequency indicative of the operating frequency of the integrated circuit. The signal generator generates an intermediate signal having a magnitude that is dependent both upon the frequency of the input signal and on another factor such as a controlled resistance. A feedback circuit receives the intermediate signal, and provides control to the controlled resistance to maintain the magnitude of the intermediate signal within a predetermined range. Thus, the magnitude of the controlled resistance is adjusted based upon the operating frequency of the integrated circuit, and the feedback signal also is related to the operating frequency. The feedback signal may then be used to adjust the bias current, so that the bias current has a magnitude that is based upon a frequency at which the integrated circuit operates, resulting in more efficient power utilization with respect to operating frequency.
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