# Questions tagged [non-linear]

The tag has no usage guidance.

104 questions
Filter by
Sorted by
Tagged with
871 views

### Simulating Chua's circuit in LTspice with a saturating transformer-based nonlinear resistor

Chua's circuit is one of the simplest circuits known to exhibit chaotic behavior. It consists of resistors, capacitors, an inductor, and an active nonlinear resistor. One implementation of this ...
1k views

### If there exists a cascade of op amps, does the previous op amp's slew rate affect the later op amp's slew rates?

All op amps used are the same Texas Instrument LM348n. The datasheet says the op amp has a nominal slew rate of 0.5 V/µs, but gives no tolerance. I have a square signal with an amplitude of 500 mV ...
2k views

### Nonlinear equation solvers in SPICE simulators

We have an assignment at the Parallel processing class, the target is to implement a Non-linear Equations solver on cuda based on Newton Raphson method and to interface this solver with an application ...
5k views

### Transformer with hysteresis in LTspice

I would like to model a transformer in LTspice with hysteresis and saturation (or just hysteresis would be nice). I have already tried the Chen model which I don't like and tried to model a regular ...
372 views

### How can I realize this nonlinear resistor?

I want to know if it's possible to realize a circuit described by the equation $$I = \sin(w V)$$ where $I$ is the current, $V$ the potential and $w$ a variable which characterizes the single ...
197 views

### Determine the output voltage

I'm trying to solve the following question: Determine the output-tuned circuit voltage in Fig. 4.P-7. The tuned circuit is resonant at $\omega_0$ and has $Q_T = 20$. My try: I don't know how to ...
2k views

### How Exactly Does a Push-pull Pair Cancel Even Harmonics?

I've been studying cassette tape circuits recently and the same bias oscillator circuit keeps cropping up time and again. This one from a copy of Practical Electronics (circa 1960): ...and this one ...
184 views

### When a signal has an interharmonic, is the signal periodic or non-periodic?

I have some questions regarding interharmonics. What I'm going to do is first ask just a few, and then as people answer them I would expand this post or create a new question. Harmonics are sinusoids ...
543 views

### What are those nonlinear loads in real microgrids/grids?

I have read in literature that nonlinear loads can impact on the operation of the so called microgrids. However, when I heard nonlinear loads I think in electronic devices such mobile phones or ...
3k views

### Thevenin equivalent in a nonlinear circuit

Is it possible to use the Thevenin equivalent of a voltage divider driving an emitter follower? simulate this circuit – Schematic created using CircuitLab In general, when is it safe to use ...
4k views

### Is voltage and current sources linear or nonlinear?

From the circuit theory it is known that an element whose response is linear is called linear element such as resistor, capacitor. For example, in case of resistor the slope between V and I is a ...
604 views

### Solving Schmitt trigger circuit using the superposition theorem

In order to solve a Schmitt trigger circuit implemented with an op-amp (or a comparator) connected in positive feedback, this wikipedia page uses the superposition theorem. My question is : why can ...
98 views

### How to even start solving multi-diode problems?

For example, in the circuit below there are 5 diodes constant-voltage-drop diodes, I could have 2^5 circuits to solve. Is there something I'm not paying attention to, that would greatly simplify this ...
301 views

### Linearizing hall effect sensors outputs

I'm trying to find a robust solution to linearize four hall effect sensors outout to obtain a signal that I can use in a PID control scheme. The output data is collect via 4 ADC channels on an ...
887 views

### Prove that in a *nonlinear* circuit, adding resistor between equipotential terminals draws no current

If a circuit is linear, then you can use Thevenin equivalence to prove that if a port of a circuit has an open-circuit voltage of 0 V (the two terminals are at the same potential), then the resistor ...
75 views

### Book to understand BJT non-linearity [closed]

Can someone please suggest a good book to understand low and high frequency non-linearities like beta, gm, cbe, cbc and rb present in bjt. Thanks
114 views

### Simple examples of higher order circuits and the cause of non linearity

In my previous question, I learned that resistance, capacitance, and inductance are not enough to capture the behavior of all circuits. This led me to the question, what are some examples of 'simple' ...
442 views

### effects of feedback on noise and non-linearities

This video lecture (start at 32:01), the professor showed a demo about the effects of feedback on noise and non-linearities. The graph below is a system with input signal which is applied directly ...
714 views

### Electrical System Harmonics

I'm a mechanical engineer so I don't know much about electric circuits and power generation to begin with. Can somebody explain what a harmonic is in the power grid and what is the reason why it is ...
685 views

### Non-linear Inductor LTSpice

I am trying to implement a non-linear inductor in LTSpice and to get it to saturate. I am using the following directive between N1 and N2 as advised in the help files: L1 N1 N2 Hc=12 Br=0.2 Bs=0.4 A=...
516 views

### SAR ADC has non-linearity around the middle of the range

I'm using a SAR ADC in STM32L433 chip and it exhibits a strange nonlinearity around the middle of the range which I can't explain. It's a 12bit ADC with 64x oversampling and 2 bit shift which ...
58 views

### Ian Fritz - Chaos - Cubic non linearity

I was reading Ian Fritz overview on chaotic circuits. As an example of non-linear circuit, he presents the following schematics This circuit is said to output a signal of the form x.(1-x^2) where x ...
543 views

### Variable-Gap Capacitors in LTSpice

I have seen several blog posts that discuss the concept of a nonlinear capacitor (or inductor) here, here, and here. Thanks to a concerned citizen for the references. I'm still struggling with the ...
141 views

### LTSpice light bulb nonlinear current

I'm in a lab and for some reason I cannot replicate my results on LTSpice. I have gathered data from an experiment where I built the circuit shown in Figure 1. I then took that data, plotted it in ...
322 views

I am using an ADS1115 as an analog to digital converter to measure temperature. I am using an RTD100 temperature sensor to measure a temperature range of -40 to 150 degree celsius but the resistance ...
598 views

### Why linearise around an equilibrium point?

In the control theory dealt in class I was taught to always linearise a nonlinear system around an equilibrium point, i.e., where $$\dot x = 0$$ However, linearization is a Taylor series expansion, ...
48 views

### Voltage of IN pin of voltage regulator

A voltage regulator has a constant output voltage regardless of the load so it can been seen as a voltage dependent resistance but I am wondering what will happen in this case: simulate this circuit &...
209 views

### A question about non-linearity of an in-amp gain

I'm observing nonlinearities in microvolt range inputs on an instrumentation amplifier. Here is the amplififer datasheet and its gain is supposed to be: G = 1 + (49.4 kΩ/Rg) And the inputs to this ...
586 views

77 views

### If interharmonics are defined for periodic signals, aren't interharmonics misleading?

Before explaining my question, I'm going to assume that 1) interharmonics, just like harmonics, are sinusoids; and 2) to analytically represent the interharmonics of a signal, we sum them to the ...
86 views

109 views

### non linear inductors characteristics

I have the following question: I have the characteristic of 2 non linear inductors and i want to find the equivalent for the following connections my problem is with the series one, i know that the ...