tyanata
Full Member level 2
operational amplifier simulation
I have a problem . I have to simulate operational ampliofier of one bandgap, but to include capacitances of all transistors connected to the output of the operational amplifier, I started to simultate the amplifier as a part of the bandgap. But there is a problem the output of the amplifier sets to 0V, The output to of the bandgap goes to 3.5V (VDD=5V). It is clear that the startup circuit doesn't work. It is strange, when I simulate the all scheme the bandgap works properly but when I simulate only the bandgap, it doesn't work. Can any one help me to cope with this probleme?!
I have a problem . I have to simulate operational ampliofier of one bandgap, but to include capacitances of all transistors connected to the output of the operational amplifier, I started to simultate the amplifier as a part of the bandgap. But there is a problem the output of the amplifier sets to 0V, The output to of the bandgap goes to 3.5V (VDD=5V). It is clear that the startup circuit doesn't work. It is strange, when I simulate the all scheme the bandgap works properly but when I simulate only the bandgap, it doesn't work. Can any one help me to cope with this probleme?!