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介绍了一种新颖的用于CT0无绳电话标准的数字收发器.该收发器采用数字调制和解调技术来进行数据传输,取代了传统的模拟调制解调方式.在发射机中,使用小数分频锁相环实现了CPFSK调制;为了减小占用带宽,使用了2RC整形技术.在接收机中,使用了一种新颖的数字解调方法实现2RCCPFSK信号的解调.该芯片采用SMIC0.35μm混合信号工艺实现,芯片尺寸为2mm×2mm.使用片外的低噪声放大器,该芯片的接收灵敏度可达-103dBm.
A novel digital transceiver for the CT0 cordless telephone standard is introduced. The transceiver uses digital modulation and demodulation techniques for data transmission, replacing traditional analog modem methods. In transmitters, a fractional In order to reduce the occupied bandwidth, a 2RC shaping technique is used.A new digital demodulation method is used to demodulate the 2RCCPFSK signals in the receiver.The chip uses SMIC0.35μm hybrid Signal technology to achieve the chip size 2mm × 2mm. The use of low-noise amplifier chip, the chip’s receive sensitivity of up to -103dBm.