Timeline for How can Chua's circuit work without having a power supply?
Current License: CC BY-SA 4.0
15 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Jul 14, 2019 at 11:52 | comment | added | D.A.S. | The gryrator was obvious and the clever bang-bang gain switching differential pair makes a nice melody of unique quasi stable oscillations somewhat like an 3D elliptical lava lamp. | |
| Jul 14, 2019 at 0:09 | comment | added | Hearth | @SunnyskyguyEE75 A few years back, under the name Felthry. I sent in a bunch of random circuits I'd made while playing around with the simulator. If you're wondering, the reason the Chua circuit in particular uses a gyrator (as it's not obvious) is because the simulator (at least when I made it, don't know about now) can't use a current as one of the axes of an x-y plot, only a voltage, and I didn't want to put a sense resistor in there and maybe mess up the dynamics of the system... though now I realize it probably doesn't matter since it's chaotic anyway. | |
| Jul 13, 2019 at 20:23 | comment | added | D.A.S. | @Hearth when did you contribute this? | |
| Jul 13, 2019 at 16:09 | comment | added | Hearth | Oh hey, neat to see the chua example circuit I contributed being useful! | |
| Jun 25, 2019 at 12:43 | comment | added | D.A.S. | proof with a 1V battery across transformer produces 1.2 gigamps and still counting with larger time steps. i.e. "ideal" i.sstatic.net/e9X8g.png | |
| Jun 25, 2019 at 12:16 | comment | added | D.A.S. | THe way this one works is actually really simple. An unstable oscillator with negative feedback from one of 2 Op AMps that alternate from linear to saturated mode at either polar rail then integrated with the LC resonance. So the exact VI polar voltages of these 3 nodes when a 4th and 5th node source saturates in one of 2 polarities and thus has some gain then a change in gain with flat VI contribution which has zero gain but toggles thru a linear zone. ( ok? but rather hard to explain) | |
| Jun 25, 2019 at 12:09 | comment | added | D.A.S. | @Shadow ... good question. These are XY or "Scatter plots" using 2 combinations of the three labels "out" Every plot is similar but unique. That's why it is called "Chaos theory." I have more examples if anyone is interested. | |
| Jun 25, 2019 at 11:48 | comment | added | Shadow | Sir, one question. What are the diagrams beneath the circuit? | |
| Jun 25, 2019 at 7:40 | comment | added | Curd | Well, all currents and volatges being and (staying) 0 is a solution of the differential equation; it's just not the most interesting one ;-) | |
| Jun 25, 2019 at 6:30 | comment | added | D.A.S. | There must be a non zero initial condition | |
| Jun 25, 2019 at 6:29 | comment | added | Jethro | Oh I get it. But what about the differential equations in the question? They should not give zero solutions... What's wrong? | |
| Jun 25, 2019 at 6:28 | comment | added | D.A.S. | Op Amps are made from transistors . Got it? | |
| Jun 25, 2019 at 6:27 | comment | added | Jethro | And you say the word transistor again and again, but there are no transistors on your diagram. I am really confused. | |
| Jun 25, 2019 at 5:33 | comment | added | Jethro | What about the initial conditions? They make all voltage and current zero. What is wrong？ | |
| Jun 25, 2019 at 3:16 | history | answered | D.A.S. | CC BY-SA 4.0 |
