2.1声道功放电路，电路简洁，音质好，便于兴趣爱好者自制-2.1 channel amplifier circuit, circuit simplicity, good sound quality, easy to enthusiasts interested in self-

disign whit HSPICE: Design and simulate a two stage CMOS operational amplifier shown in the Fig., for these conditions:  DC Voltage Gain > 60dB  Unity Gain Bandwidth > 70MHz  Phase Margin > 50 degrees 