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EECS 522 | Analog Integrated Circuits |
Analog Front-End Direct Conversion Receiver for 802.11b WiFi ApplicationsAbstract For our project, we are designing an analog front end receiver to meet the IEEE 802.11b standard. We will be designing five main blocks: a LNA, single-to-differential balun, mixer, QVCO with frac-n PLL stabilization, and a Gm-C channel-select filter. This receiver will be designed around minimizing power while still achieving an acceptable BER for this WiFi standard. The LNA block is a typical common source degenerated stage. Cascading may be added if additional gain is necessary for later blocks. The mixer is a differential Gilbert cell which utilizes current bleeding and inductor degeneration for linearization. Our QVCO is an LC oscillator with PMOS tail current. It is controlled by a fractional-N type 2, 3rd order PLL. Lastly, a Gm-C filter will be constructed using multiple OTA cells organized to achieve a sixth-order Chebshev response. Files |
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