molloy
Member level 3
Hello,
i was requested to design a 700KHz-3MHz 50W amplifier for a piezoelectric probe. The problem is the load: it could be a probe with a resistive part of 3ohm up to 30ohm and the resonance is in 700KHz 3MHz band.
So i suppose i can't do a power match as i was used in rf power amplifier. I just decided to use 2 Vishay MOSFET in a class B push-pull topology with a 28V power supply and an output transformer. But i don't know how to design the output matching. Maybe i will match it at 30ohm and then i will check it at the other working condition. Is that a good idea or there are different methodology of design for such a power amplifier? What i can look-through to understand how to make sucha type of amplifiers?
Any idea is welcome
Thanks a lot
regards
i was requested to design a 700KHz-3MHz 50W amplifier for a piezoelectric probe. The problem is the load: it could be a probe with a resistive part of 3ohm up to 30ohm and the resonance is in 700KHz 3MHz band.
So i suppose i can't do a power match as i was used in rf power amplifier. I just decided to use 2 Vishay MOSFET in a class B push-pull topology with a 28V power supply and an output transformer. But i don't know how to design the output matching. Maybe i will match it at 30ohm and then i will check it at the other working condition. Is that a good idea or there are different methodology of design for such a power amplifier? What i can look-through to understand how to make sucha type of amplifiers?
Any idea is welcome
Thanks a lot
regards