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在短距离通信的各种无线通信系统中,无线局域网(WLAN)是最受欢迎的,因为其数据速率高。要实现WLAN终端的低成本和低功耗,就需要一个全集成的CMOS RF收发机,与它最适配的是低中频(IF)或零IF(直接转换)结构,因为外部元件数可减至最少。低IF结构对DC偏移和闪变效应噪声的抗性要比
In various wireless communication systems that communicate over short distances, wireless local area networks (WLANs) are the most popular because of their high data rates. To achieve the low cost and low power consumption of WLAN terminals, a fully integrated CMOS RF transceiver is required, which is best suited for low IF or zero IF (direct conversion) architectures because the number of external components can be reduced To the least. The low-IF structure is more resistant to DC offset and flicker noise