一种高性能隔离运算放大器的设计与分析
摘要
这款隔离运算放大器分为调制部分和解调部分,调制部分把输入的模拟信号PWM调制为20MHz的方波信号,通过ADI公司的icouple~?磁耦合模块传输到解调部分,解调部分将方波信号解调为模拟的电压信号。此款运放通过采用高速比较电路、离散采样网络和高精度基准源等优化方案,最终可以实现在0V～2.5V精确的1:1传输,频率响应为3 MHz,输出纹波小于3 mV。
引文
[1]Razavi,Behard.Design of analog CMOS integrated circuits=模拟CMOS集成电路设计[M].清华大学出版社,2005.
[2]Zhou Z K,Shi Y,Huang Z,et al.A 1.6V,5-ppm/C,C Curvature-Compensated Bandgap Reference[J].Circuit&Systems I Regular Papers IEEE Transactions,2012,59(4):677-684.
[3]Zhou Z K,Zhu P S,Shi Y,et al.A CMOS Voltage Reference Based on Mutual Compensation of Vtn and Vtp[J].IEEE Transactions on Circuits&Systems II Express Briefs,2012,59(6):341-345.
[4]Bult K,Geelen G J G M.A fast settling CMOS op amp for SC circuits with 90-dB DC gain[J].IEEE Journal of Solid-State Circuit,2002:108-109.
[5]Razavi B.Rotary TravelingWave Oscillator Arrays:A New Clock Technolgy[C]//Wiley-IEEE Press,2009:318-329.
[2]Zhou Z K,Shi Y,Huang Z,et al.A 1.6V,5-ppm/C,C Curvature-Compensated Bandgap Reference[J].Circuit&Systems I Regular Papers IEEE Transactions,2012,59(4):677-684.
[3]Zhou Z K,Zhu P S,Shi Y,et al.A CMOS Voltage Reference Based on Mutual Compensation of Vtn and Vtp[J].IEEE Transactions on Circuits&Systems II Express Briefs,2012,59(6):341-345.
[4]Bult K,Geelen G J G M.A fast settling CMOS op amp for SC circuits with 90-dB DC gain[J].IEEE Journal of Solid-State Circuit,2002:108-109.
[5]Razavi B.Rotary TravelingWave Oscillator Arrays:A New Clock Technolgy[C]//Wiley-IEEE Press,2009:318-329.