| 摘要 |
A frequency-controllable amplifier circuit is responsive to a frequency sensor for controlling the transconductance of an amplifier by adjusting the power supply potential thereof. The frequency sensor monitors the output frequency of the amplifier and generates a control signal having a first state upon detecting the output frequency above a predetermined threshold. The first state of the control signal increases the power supply potential to the amplifier which increase its transconductance. The frequency sensor also detects when the output frequency of the amplifier is below the predetermined threshold and switches the control signal to a second state to decrease the power supply potential to the amplifier which reduces its amplification.
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