Other Parts Discussed in Thread: TINA-TI
Hello,
I currently use the OPA855 as the first stage, and then I want to cascade two or three stages but I have some difficulties. Question about the phase: Debug the OPA855 closed-loop bandwidth reached 2GHz, does my phase shift from the graph by 120°?Or do I want to measure a specific phase offset between the input and output of a specific experiment test? How do you calculate the phase shift caused by the RF amplifier if I want to add RF amplification under phase margin? If the first RF amplifier brings 45° phase shift, can only one stage be cascaded again at most?
Best regards
kailyn