带有二进制开关和恒跨导偏置的信号求和型可编程增益放大器（英文）

发布时间：2018-06-24 13:58

本文选题：可编程增益放大器 + 可变增益放大器　；参考：《Journal of Southeast University(English Edition)》2017年02期

【摘要】：提出了一种基于信号求和结构的新型可编程增益放大器.不同于传统的信号求和可变增益放大器,在本设计中,通过二进制开关的控制接入分流管的宽长比来实现分流管的跨导改变.二进制的设计可以实现精确的6 dB增益步长.恒跨导偏置技术保证了电路实现精确的增益,且不受工艺、电压和温度变化的影响.P-well NM OS技术消除了背栅效应对增益误差的影响.低增益采用源极退化技术实现,实现了信号强度较大时,电路具有高线性度.所设计的可编程增益放大器采用0.18μm CMOS工艺制造.测试结果显示,增益范围为0~24 dB,增益步长6 dB,最大增益误差为0.3 d B.在不同增益下,电路都能保证恒定210 MHz带宽.OIP3和最小噪声系数分别为20.9 d Bm和11.1 dB.电路版图紧凑,核心面积为0.068 mm~2.在1.8 V的电源电压下,消耗4.8 mW功率.
[Abstract]:A new programmable gain amplifier based on signal summation structure is proposed. Different from the traditional signal summation variable gain amplifier, in this design, the transconductance change of the shunt tube is realized by using the control of the binary switch to access the aspect ratio of the shunt tube. The binary design can achieve an accurate 6 dB gain step. Constant-transconductance bias technology ensures the accurate gain of the circuit, and is not affected by the process, voltage and temperature changes. P-well NMOS technology eliminates the effect of the back gate effect on the gain error. The low gain is realized by the source pole degradation technique. When the signal intensity is high, the circuit has high linearity. The programmable gain amplifier is fabricated in 0.18 渭 m CMOS process. The results show that the gain range is 0 ~ 24 dB, the gain step is 6 dB, and the maximum gain error is 0.3 dB. At different gain, the circuit can guarantee constant 210MHz bandwidth. OIP3 and minimum noise coefficient of 20.9 dBm and 11.1 dB, respectively. The circuit is compact and has a core area of 0.068 mm / 2. At 1.8 V power supply, 4.8 MW power is consumed.
【作者单位】：东南大学射频光电与集成电路研究所;
【基金】：The National Natural Science Foundation of China(No.61306069)
【分类号】：TN722

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