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设计了一个用于非相干脉冲超宽带接收机的0.18-μm CMOS工艺的能量检波器.该检波器包含了输入匹配模块、平方电路、翻转电压跟随器-电流检测电路、跨导级以及输出缓冲器.平方电路运用饱和区晶体管的平方律特性对输入差分信号进行平方,所得到的输出电流由翻转电压跟随器-电流检测电路转换成电压.跨导级对该信号进行放大并积分得到所接受的能量.测试结果可以看出,当输入信号的峰峰值超过60mV时,在高达300MHz的频率下检波增益可以达到10dB.而最小检测幅度为13mV,此时的检波增益为5dB.在移除输出缓冲器之后,输出脉冲的幅度将增加一倍.不计及测试焊盘,芯片面积为0.23mm×0.3mm.电路由一个1.8V的电源供电,核心电路电流为3.5mA.该检波器已成功应用于开关键控方式的接收机以实现高速宽带通信.
A 0.18-μm CMOS process energy detector for incoherent pulse ultra-wideband receivers is designed and includes an input matching module, a squaring circuit, a flip-flop follower-current-sensing circuit, a transconductance stage and an output buffer The square circuit uses the square-law characteristic of the transistor in the saturation region to square the input differential signal, and the resulting output current is converted to voltage by the flip-flop voltage follower-current detection circuit. The transconductance amplifier amplifies and integrates the signal received Of the test results can be seen when the input signal peak to peak more than 60mV, up to 300MHz frequency detection gain up to 10dB while the minimum detection amplitude of 13mV, the detection gain of 5dB at this time in the removal of the output After the buffer, the amplitude of the output pulse will be doubled. Regardless of the test pad, the chip area is 0.23mm × 0.3mm. The circuit is powered by a 1.8V power supply with a core current of 3.5mA. The detector has been successfully used On-off keying receiver for high-speed broadband communications.