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In this simulation the circuit generates a AC signal at "Electrode". Here I am using two SPDT-Switches (Ron = 4 Ω).

1.Circuit

My first question: Why isn't the signal correctly rectangular? And how can I correct that?

1. Result

On the second circuit I am replacing the ideal current generators with current sources:

2. Circuit

My second question: Why aren't the signals at "sw1" and "sw2" constant over time and why don't they have a similar value as in the first simulation? And how can I correct that? Or which circuit mirror implementation should I use instead?

2. Result

2.2 Result

2.3 Result

I tried to plot the signals, which may be needed for the interpretation.

ocrdu
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Electrofreak
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  • As I understand from the second circuit you are copying the current I1 into two directions. (into top side & bottom side of the circuit). And the opamp & bipolar implementation is used as a current source. And the current sources are cousing current errors, which are expected. There are some solutions to fix the errors. – elektronik Jan 20 '22 at 09:22
  • Apparent component clutter: R4, R5, Vdd, Vss, U2_in, U1_in. If you explained what you expected to happen it might make it easier to wade through the circuit and understand it. – Andy aka Jan 20 '22 at 09:50
  • @Andyaka I expect, that same current flows through the emitter and through the collector of bipolar "Q2". Or same current flows through the emitter and through the collector of bipolar "Q1" – Electrofreak Jan 20 '22 at 11:30
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    If you meant `_BBM2` to be the complementary of `BBM1`, you misaligned the pulses. Better make a "master" clock, to which add a `[Digital]/buf`, which will give you true complementary outputs (voltage levels can be set with `vhigh, vlow`, optional `ref` for input threshold). Still, I don't really understand what you're trying to accomplsh. – a concerned citizen Jan 20 '22 at 19:11

0 Answers0