# Questions tagged [hysteresis]

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### Question when obtaining magnetic flux density B

I am trying to obtain the magnetic flux density B of a toroidal transformer with one winding around the core. I am injecting a voltage in the terminals of the winding, and I am measuring this voltage ...
• 11
1 vote
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### What's the deal with this comparator's hysteresis?

I have here a circuit designed by someone else to create a 50% duty cycle square wave that leads a current transformer in phase. The CT maxes out at about 1 amp, and the output of the phase-leading ...
295 views

### I need help to identify the negative feedback loop in a hysteresis comparator

Can anyone help me identify where the negative feedback path is? I want to determine the feedback factors for both negative and positive feedback, but it's not clear to me where the negative feedback ...
• 302
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### In the following circuit, do T1 and T2 conduct or block when the circuit is in the LOW or HIGH state?

This circuit is a Schmitt trigger, and the supply voltage Ucc.​ is 15V. I want to calculate whether the transistors T1 and T2 are conducting or not when the state is LOW or HIGH(U(A)). These ...
1k views

### Hysteresis on inverting terminal for comparator circuits?

If you examine 98% of circuits online that include hysteresis for a comparator, they always implement the hysteresis on the non-inverting input, like so: This is easy enough to calculate. However, ...
• 713
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### Is magnetic hysteresis present even with a DC bias?

Consider the following circuit: With Vin(t) = A sin(ωt) for some given frequency ω. The relationship between Vin and Vout is certainly non-linear, because of the effect of hysteresis in L's magnetic ...
• 2,163
424 views

### I am facing a problem while designing a Schmitt trigger circuit

I am applying a Schmitt-trigger to the waveform given in the figure below. . This is a 3.5 volt signal and I want to perform thresholding so I use 1.58 volts as upper threshold and 1.17 volts as lower ...
1 vote
109 views

### Weird hysteresis behavior

I am an EE student and recently we worked with Schmitt triggers, positive feedback loops, and hysteresis. I was curious and hooked up an mcp601 without a feedback loop as such: In the above schematic ...
889 views

### Hysteresis on LTspice with thermistor

I'm trying to simulate an hysteresis on LTspice. The goal is just to see how evolve the output voltage in function of the value of the thermistor. For this, I have done a simulation with several steps....
• 2,478
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### Op-Amp dynamic hysteresis

What is dynamic hysteresis in Op-Amp? I read section 4.3 of the this App Note and was not clear. Can someone explain me why this is happening?
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### Can we declare Schmitt triggers to have memory? Can we call their output levels states? [closed]

Are Schmitt triggers able to be declared as having memory? Can we call their output levels states?
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### How is the effective parallel resistance of this resistor network determined?

I have this circuit: The effective resistance at the reference node of D4801 is given as Rb = R4802||(R4805+(R4807||(R4806+R4808+44KOhm))) = 9.129KOhm I am not able to understand how this formula is ...
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### MAX882 battery protection

I am thinking of using the MAX882 IC to protect my battery from overdischarging. What I could not understand from the datasheet I provided is that, if I use the STBY pin to set a threshold for my ...
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### Comparator hysteresis input signal filter

I need to heavily low pass filter an input to a hysteresis comparator, but due to the fact that R1 is one of the components setting the hysteresis, I can't add additional RC-circuits in series with it....
133 views

### How to define the hysteresis of the buck-boost operation mode?

In the buck-boost (transition) operation mode of a four switch cascaded buck boost converter, there is supposed to be a hysteresis to prevent bouncing. How do we define the hysteresis in this case as ...
806 views

### RS485 Input Hysteresis

What is the meaning of Input Hysteresis in the context of a RS485 transceiver? Thanks
532 views

### Comparator have hysteresis with pull-up resistor?

I didn't add any hysteresis to below circuit but there's ~500 mV delay between output going high and low, output goes high at 7.5 V but goes low at 7 V: simulate this circuit – Schematic ...
• 2,406
1 vote
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### resistor selection for TPS3700DDCR undervoltage circuit

I am designing an undervoltage circuit for a lipo battery project. I found this tutorial here which lead me to the TPS3700. I am wanting the undervoltage condition to be 3 volts. The part that I am ...
56 views

### Does a pinch imply the presence of memcomponents?

There is a famous article by Chua "If it's pinched it's a memristor", where he defines a memristor as having a "[...] pinched hysteresis loop in the voltage–current plane when driven by ...
1 vote