Design of Operational Amplifier IP Core for SOC Application
Cheng Chun-la · Microcomputer Information · 2008
Based on SOC application,a low voltage,high gain rail to rail operational amplifier IP core with constant-transconductance is presented,It will be realized in TSMC 0.18μm CMOS process.The transconductance of input stage is controlled by a method of current mirror and new commongate frequency compensation is used.The whole circuit is simulated with 1.8V power supply,10pF capacitive load in Hspice,it is shown that the amplifier has an open loop gain of 103.5dB,a phase margin of 60.5 degrees and a low transconductor deviation of 3%.