ccchang
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Hi and greeting to all,
I currently designing a function generator for testing purpose. The function generator supposes to generate 50 V peak-to-peak at 10kHz. However, I still having problem when the function generator output loaded with small load (50 Ohm @ 500mA).
1.) I use a High Power Op Amp (National Semiconductor LM675T) as a unity gain buffer, but still the output is distorted when loaded with small load. Not yet try on inverting or non-inverting amplifier, because by theory the these configuration will increase the output impedance. Am I right ?
2.) I also try on inverter buffer (Attached picture), but we needed Turn-on voltage for the NPN and PNP. Thus, the sine wave has plateau at center. Also in this case, the PNP will generate a lot of noise when reaching the rail.
I am seeking any other High current buffer design that fit to the requirement.
Thanks in advance.
Best Regards,
--CCChang
I currently designing a function generator for testing purpose. The function generator supposes to generate 50 V peak-to-peak at 10kHz. However, I still having problem when the function generator output loaded with small load (50 Ohm @ 500mA).
1.) I use a High Power Op Amp (National Semiconductor LM675T) as a unity gain buffer, but still the output is distorted when loaded with small load. Not yet try on inverting or non-inverting amplifier, because by theory the these configuration will increase the output impedance. Am I right ?
2.) I also try on inverter buffer (Attached picture), but we needed Turn-on voltage for the NPN and PNP. Thus, the sine wave has plateau at center. Also in this case, the PNP will generate a lot of noise when reaching the rail.
I am seeking any other High current buffer design that fit to the requirement.
Thanks in advance.
Best Regards,
--CCChang