Is the circuit functionally equal, with the yellow switches always in 'closed' state? (Each yellow switch is a 2DP switch together with the switch left of it)
I'm creating a guitar pedal Fuzz effect, based on Randofo's Instructable, see the picture. https://www.instructables.com/id/The-Fuzz-of-1000-Faces/
The red cross and resistor on the right (marked in red) is an 'enhancement' how the circuit should be.
The original idea is to use for the selection of the 2 x 6 switches (the combination of the yellow marked and the ones left of it) to use 2P6P rotary switches.
I want to use (analog) multiplexers, to control them digitally.
Current, I'm using CD4052's to handle 4 transistors by one CD4052, where one channel is just for the yellow switch, and one for the switch left of the yellow.
However, I'm wondering if the yellow switches are needed at all. Reason is that it doesn't matter if current flows into the transistor's collector, because if the transistor's base (same 'switch signal') doesn't get any current, the collector's signal will not be forwarded to the emitter anyway.
So, is the circuit functionally equal, to remove the yellow switches? (and assume it's a continuous path) ?
Because of Andy Aka's useful comment to try Micro-cap 12 which I installed, I did some analysis, but I don't understand why the results are as they show.
I made the following (minimalistic) circuit:
I set V2 to DC 4.5 V, and amplitude 4.5V, to get values between 0-9V.
What can be seen is that the emitter of the transistor is 3.879V. In the Fuzz normally switch 2 and 4 are tied together (SPDT), similar as switch 3 and 5, but I want for analysis to control them separate.
When I however also connect switch 5, the result of the voltage of the transistor's emitters is still 3.879 V ... so far so good. And when I only select switch 5, I get 3.878 V.
So the result is that it doesn't matter if I remove switch 4 and 5.
However, when I tried NONE of the switches, so no collector is attached anywhere, it still shows 3.878 V.
So how is this possible? This would mean I don't have to connect anything at the collector? This seems strange to me.
Now I simulated a full chain (using 1 capacitor, 1 transistor, 1 transistor, 1 capacitor).
The input I set to Amplitude 0.5V, DC 1V (to get a s ignal between 0.5 and 1.5V).