I'm trying to figure out an H-bridge circuit that enables me to drive a low current load. With motors and other high current loads, the FETs have no problem turning on and off since the driving voltage is high enough. What about low current loads? how to alternate polarity for a load driven by a small signal? any ideasfor circuits that might work is appreciated.
Could small signal BJTs be used instead? How small is the signal mentioned? Not having thought much about it, maybe nanopower op amps (as comparators) would be able to source/sink the low current, depending on how "low current" actually is.
Could small signal BJTs be used instead? How small is the signal mentioned? Not having thought much about it, maybe nanopower op amps (as comparators) would be able to source/sink the low current, depending on how "low current" actually is.
With the few information given up to now, it sounds like you are rather looking for a linear differential output amplifier than a switching "H-bridge".
Depending upon your voltage range (if you can tolerate only positive voltages, for example) you might be able to use a basic dual mux switch, such as Maxim MAX4639?