| Summary: | 碩士 === 國立交通大學 === 電信工程系 === 91 === A wideband linear up-down converter mixer for digital TV Tuner is studied by using TSMC 1P5M25 0.25 UM process.
The current sourse of the Gilbert Cell Mixer is removed and the degenerated resistance is used to achieve the high linearity of the upconvertion mixer. The power gain of the upconversion mixer is 6 dB, the OIP3（Output Third Intercept Point） is 61.577 dBmv, and the power consumption is 32.5625mW. As for the image rejection mixer, it consists of downconversion mixer , voltage-controlled oscillator , polyphase filter, and the Hartley architecture is employed to realize image rejection. The ratio of image rejection is at least 31 dB in spite of the process variation. In summary, the bandwidth of this up-down converter mixer is 50〜860MH, the output IF frequency is 43.75 MHz, the power consumption is 86.9221 mW, the OIP3 is 62.7145 dBmv.
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