|
Okay when op amps are incompatible with bridged amplifier mode, you can always make a phase inverter and feed two identical noninverting closed loop gain amplifiers, with an antiphase signals at the inputs. Most phase inverters are quite linear because they work with a very deep negative feedback e.g. they just invert the signal, they don't have voltage amplification, so it's probably a good way to go around it. There are other ways to go about it, there are half a dozen phase inverter topologies you can choose from, each one with its set of pros and cons. In this case there is no need to use 2 output phase inverter, because the amplitude of the input signal of both op amps, is the same, but if you were to first amplify the input even just a little, then you'd have to use a two output phase inverter. I typically use a split load because it's simple, it operates with 50% internal negative feedback, which makes it quite linear and is easy to symmetrise. It has it's cons though, it's two outputs, are at different impedance levels, which makes the loading hard to symmetrise, and it has a very gross distortion when overdriven (frequency doubling). In this example, your best bet is to go with a single output inverter with no voltage gain and hope for the best. I hope that clears it out a little
|
