Recently I have been thinking of a possible way of implementing a feedback control loop without using active components. It's quite common to use amplifiers in feedback loop perhaps for implementing summing circuits, forward gain or even compensation networks.
Imagine a simple case whereby a signal (voltage) is fed into an amplifier and the output of this amplifier is fed back and added/subtracted from the input signal at the summing point to complete the loop. One can imagine that if the output voltage is less than the voltage at the summing point then current won't flow back from output back to the summing point to fascillitate feedback. So some form of amplification or buffering would be necessary and we can use amplifiers to get around this.
But what if we use a transformer to step up the voltage and then feed back this higher voltage back to the summing network at the input? Is it a viable way of achieving feedback or am I overlooking certain barriers with regard to the dynamics of the transformer itself maybe?
If this is viable, regardless of how complicated the design might be, I wish to invest a bit on studying models of transformers and see if I can demonstrate simple feedback loop with them.
Thanks in advance for your thoughts on this.
Imagine a simple case whereby a signal (voltage) is fed into an amplifier and the output of this amplifier is fed back and added/subtracted from the input signal at the summing point to complete the loop. One can imagine that if the output voltage is less than the voltage at the summing point then current won't flow back from output back to the summing point to fascillitate feedback. So some form of amplification or buffering would be necessary and we can use amplifiers to get around this.
But what if we use a transformer to step up the voltage and then feed back this higher voltage back to the summing network at the input? Is it a viable way of achieving feedback or am I overlooking certain barriers with regard to the dynamics of the transformer itself maybe?
If this is viable, regardless of how complicated the design might be, I wish to invest a bit on studying models of transformers and see if I can demonstrate simple feedback loop with them.
Thanks in advance for your thoughts on this.