Due to introduce a novel structured variable gain amplifier with high gain adjustment range, measurement results show that output power range of the IF modulator is -81～-10 dBm; the operation frequency is up to 600 MHz; the output noise at the minimum gain setting is -140 dBm/Hz, and the output P1 dB at the maximum gain setting is -4.
2 5 μmCMOS混合工艺 ,针对超外差结构的无线宽带收发器 ,实现了一个能够工作在 5 0～6 0 0MHz的中频调制器 ,并对该调制器进行了仿真和测试。
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