Could the right emitter follower scheme,say for instance the one in the diagram be used to produce a 200mv ripple with a 3volt DC offset at the output assuming the load at the output sinks large(600mA-1A) amounts of current? In accordance with the unity gain votage of an emitter follower would i just set bias points and input a 200mv sin wave at the input?....with the caps in place would i have any DC at all? this is related to this thread:https://www.electro-tech-online.com/threads/what-op-amp-to-use.31477/?highlight=psrr
oh...ideally im planning to sweep from DC to 20 Mhz but ill take whatever range i get a flat response from....the voltage supply is 3.6V DC but with a 200mv ripple(the ripple amplitude is flexible)
oh...ideally im planning to sweep from DC to 20 Mhz but ill take whatever range i get a flat response from....the voltage supply is 3.6V DC but with a 200mv ripple(the ripple amplitude is flexible)
No, no restrictions on the voltage supply. I made a mistake in my last post.....,its my output voltage that i need at around 3.6V with about 200mv ripple.there is no restriction on the supply
No, no restrictions on the voltage supply. I made a mistake in my last post.....,its my output voltage that i need at around 3.6V with about 200mv ripple.there is no restriction on the supply
To clarify: 3.6VDC with 200mV p-p ripple is the input to the regulators you are testing, and you want a circuit that can deliver this at up to one amp?
To clarify: 3.6VDC with 200mV p-p ripple is the input to the regulators you are testing, and you want a circuit that can deliver this at up to one amp?
Do you need a capacitor on the input of your regulator for stability? Most do. If so, it will be pretty much impossible to drive to 200mV p-p at 20MHz.
What kind of regulator are you testing?
the regulators are designed to work with a 3.6V DC input,its this input i wanted to replace with something else just to see how the regulators would perform on PSRR
the regulators are designed to work with a 3.6V DC input,its this input i wanted to replace with something else just to see how the regulators would perform on PSRR
The input current to a buck regulator is discontinuous. The transient currents mean that your ripple generator will need to have very low impedance, even at high frequencies. I don't think that is going to work with an emitter follower.