Hello,
I have simulated a Twin-T oscillator using LTSpice. As shown in the
attachment I have done this with a UA741 op-amp. I am however
having an issue with the gain. Assuming the op-amp is powered
on both rails (is that how we say this?) with 5V sources and knowing
that the UA741 will not reach the 5V maximum I was assuming that
I could get at least a sine wave with about 4Vpp.
Simulation shows a maximum of about 742mv pp with R5 set to 27K.
I have tried various values of R5 but cannot get anything better than that.
What is more increasing/decreasing R5 does not correspond to an
increase/decrease in Vout.
As I understand it, at the resonance frequency the negative gain
feedback loop attenuates all signals so the gain is simply determined
by the combination of R5 and R6. Can anyone confirm this?
What is the gain of this circuit? How could I maximize gain?
TIA.
I have simulated a Twin-T oscillator using LTSpice. As shown in the
attachment I have done this with a UA741 op-amp. I am however
having an issue with the gain. Assuming the op-amp is powered
on both rails (is that how we say this?) with 5V sources and knowing
that the UA741 will not reach the 5V maximum I was assuming that
I could get at least a sine wave with about 4Vpp.
Simulation shows a maximum of about 742mv pp with R5 set to 27K.
I have tried various values of R5 but cannot get anything better than that.
What is more increasing/decreasing R5 does not correspond to an
increase/decrease in Vout.
As I understand it, at the resonance frequency the negative gain
feedback loop attenuates all signals so the gain is simply determined
by the combination of R5 and R6. Can anyone confirm this?
What is the gain of this circuit? How could I maximize gain?
TIA.
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