phase error measurement
phase error measurement
(OP)
Can anyone tell me a way to make a phase error measurement on a low noise amplifer.
thanks,
thanks,
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RE: phase error measurement
RE: phase error measurement
If the amplifier in question is an op-amp, just look at a datasheet to get the information. Otherwise, make the measurement as buzzp described in increments over the band of frequencies you will be using the amplifier over. Make a plot of the change in phase delay versus frequency to get phase error. If you are only working at very low frequencies, the change in phase delay may be small enough to not matter. For example, if you are using an amplifier with a 1 megahertz bandwidth, just to amplify audio, don't worry about it.
Hope this helps.
Lewis
RE: phase error measurement
The phase margin is not very meaningful in the real world. The problem we found about the phase margin is the phase linearity or phase margin Vs frequency.
If you want to measure the phase error or insertion phase, a vector network analyzer will help.
The other terms named "phase noise" may be used in the LO driver. We concern on the Lo' phase noise and the noise figure will add on it for the total noise.
I hope it help.