Hello all,
I'm currently designing a op-amp, but I had some problems.
My op-amp is made up of pnp differential amplifer, using active load and current source using current mirror, follow by a CE circuit, and CC. The output is tapped from CC configuration.
What difference does it make if the differential amplifier is configuration using NPN? What are the pros and cons using them?
Initial design was to use only 1 power supply, +10V. In the later stage of the design, I was told to use 2 supply, +5V and -5V. What are the advantges of using dual supply? Does it increase the input range?
Simulted result give a open loop gain of 850. Individually the differential amplifier has a gain of 2000. How can we determine the overall gain (open loop gain) by calculation? I try to determine the gain of each stage indivdually, then multiply them together, but it doesnt telly with the simulated results.
How can we determing the output and input dynamic range?
How can we determine the common mode gain?
What is miller effect?
I'm currently designing a op-amp, but I had some problems.
My op-amp is made up of pnp differential amplifer, using active load and current source using current mirror, follow by a CE circuit, and CC. The output is tapped from CC configuration.
What difference does it make if the differential amplifier is configuration using NPN? What are the pros and cons using them?
Initial design was to use only 1 power supply, +10V. In the later stage of the design, I was told to use 2 supply, +5V and -5V. What are the advantges of using dual supply? Does it increase the input range?
Simulted result give a open loop gain of 850. Individually the differential amplifier has a gain of 2000. How can we determine the overall gain (open loop gain) by calculation? I try to determine the gain of each stage indivdually, then multiply them together, but it doesnt telly with the simulated results.
How can we determing the output and input dynamic range?
How can we determine the common mode gain?
What is miller effect?