A CMOS baseband receiver for wireless broadband communications

This paper presents an UWB baseband receiver including VGAs, LPFs, FGAs and IO buffers, fully integrated in 130nm CMOS process. The voltage gain range by two VGAs and a FGA for each I/Q path is from −5 to +65dB providing a dynamic range of 70dB. For a more stable operation against variations in process, voltage and temperature (PVT), the cut-off frequencies of our receiver can vary from 183 to 548MHz by changing 3dB bandwidths of a LPF. The LPF consists of three biquads having different bandwidths and Q factors. The core area of our baseband receiver is about 600um X 1000um. The receiver without an IO buffer draws only 13.4mA from a 1.5V supply for each I/Q branch.