Class A Differential Bridge

133

02:04:17

This is something one would probably call class A differential bridge. The question is: Is it something already known or is it a new invention? Please, give reference if known. 

published 11 years ago

gravityx

11 years ago

Well, feeding a load with two ampifiers that in there turn are fed with two identical signals but out of phase is no new idea exactly. If someone has tried it with class A? Absolutely. But i dont know if the exact configuration that you've here has been realized by someone else.. :)

stanislav_maslovski

11 years ago

gravityx, what you describe constitutes the basic H bridge working principle, which is well known. However, this circuit is more than that.

gravityx

11 years ago

Yeah you're right! Do you know what sets the voltage gain?

stanislav_maslovski

11 years ago

Because this circuit is a hybrid of two differential amplifiers and a bridge, the voltage gain depends on the transconductance of the circuit which is set by the two current sources. In a sense, you may also call this circuit a differential bridged transconductance amplifier, i.e., it works as the voltage controlled current source.

yra

10 years ago

Very nice motor speed control with slight modification. I like this very much and see a ultrasound driver in its future. Thanks for the idea.

yra

10 years ago

Distribution of the load makes sinking easy & having the preamp stage gives more flex with power handling. I like it.

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