Products > Test Equipment
Keithley 2400 SourceMeter review and teardown
uoficowboy:
--- Quote from: TiN on January 07, 2014, 04:43:11 am ---Output stage
--- End quote ---
Anybody care to venture an explanation as to how this power stage works? I've never seen anything like it!
SeanB:
It is designed to reduce dissipation in the devices, as the output voltage rises various devices turn on and off so as to use the various supply rails so as to not dissipate high power at low voltage output. The mosfets are held off until the output is close to the supply rail for the section then they start turning on and then the diodes block current from flowing back into the various supplies.
EEVblog:
Awesome work on the teardown and photos.
I so want one of these, or more precisely (pun intended), the newer model.
EEVblog:
--- Quote from: SeanB on January 09, 2014, 06:00:51 am ---It is designed to reduce dissipation in the devices, as the output voltage rises various devices turn on and off so as to use the various supply rails so as to not dissipate high power at low voltage output. The mosfets are held off until the output is close to the supply rail for the section then they start turning on and then the diodes block current from flowing back into the various supplies.
--- End quote ---
I recall Doug Ford explaining to me once how he used something similar in his Jands audio amp designs.
nowlan:
Sounds like Class-G amplifier.
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