# Tag Info

## Hot answers tagged thevenin

Accepted

### Hysteresis on inverting terminal for comparator circuits?

Here are the two scenarios you describe, one with negative feedback (left), the other with positive (right): simulate this circuit – Schematic created using CircuitLab The only difference ...
• 39.1k

### Hysteresis on inverting terminal for comparator circuits?

The point of hysteresis is to reinforce the output state using the input, so that if the input signal has a small amount of noise on it, your output does not change state due to that noise. The ...
• 780
Accepted

### BJT four-resistor bias circuit analysis, parallel resistors

Thevenin's theorem applies as follows:
• 1,515

### Hysteresis on inverting terminal for comparator circuits?

Vref does change, but into wrong direction, so it amplifies noise instead of ignoring noise. So when input voltage is between thresholds, the output oscillates.
• 159k

### Hysteresis on inverting terminal for comparator circuits?

You can invert the output with a digital inverter and thus apply positive feedback to the inverting input. Otherwise you've got negative feedback, which makes an amplifier or an oscillator, depending ...
• 407k

### BJT four-resistor bias circuit analysis, parallel resistors

Let me provide a different way of looking at it. It may be simpler to see your question with regard to $R_1$ and $R_2$ using math. Let's keep the BJT base current in place and assume that it is ...
• 11.2k

### Is it wrong to use Thévenin's theorem on this memory circuit?

The upper NOT gate has a Thevenin equivalent circuit for the particular state it is describing. In that state it is shown as a voltage source with +V2, and +V1 and a series resistance each. It is ...
• 2,656

### Failing to compute Thévenin voltage

What is wrong about my reasoning? How is the reasoning of the solution explained? You need to resolve current i.e. you need to establish what $I$ is. $I$ equals the supply voltage ($V_1$) ...
• 465k

### How to solve Thevenin and Norton circuit?

From what I remember, you need to short the circuit for voltage sources then open circuit for current sources. With that, I used it to solve for RTH which is 58 ohms (but i don't know if I got it ...
• 465k
Accepted

### Node equations for Thevenin voltage

Nodes Let's get one thing straight. When doing circuit analysis: simulate this circuit – Schematic created using CircuitLab Spend some time to make sure you are comfortable with all three: Top:...
• 11.2k
Accepted

### Thévenin's Theorem - What to do when ending up with a voltage source in paralell with one resistor?

You made two errors. You need to calculate the thevenin voltage by finding the open-circuit (no load) output voltage of the circuit. You do this using the full schematic of the circuit, not one with ...
• 131k
Accepted

### Finding the Thévenin and Norton equivalents for a circuit

I would really appreciate some help Usually, these problems area easier to solve by converting the voltage to a current source: - Then, because current sources play no role in the impedance it's ...
• 465k

### Thevenin's Equivalent using KCL - Circuit Analysis

I will show how I would find the impedance between A and B, 1) if I have a simulator handy, and 2) by hand. simulate this circuit – Schematic created using CircuitLab If I have a simulator ...
• 25.3k

• 465k
Accepted

### How can there be no Thévenin voltage with only a dependent voltage source?

The circuit is composed only of linear components - impedances and a linear dependent voltage source. Hence the overall circuit is linear. From the linearity of the circuit, it follows that the ...
• 20.2k

### Min and max resistance of this network with potentiometer

As you suggested in the comments, the potentiometer is just two resistors in series, which I will call $R_1$ and $R_2$ here: simulate this circuit – Schematic created using CircuitLab Total ...
• 39.1k

### How to solve Thevenin and Norton circuit?

In your example, you know you got $-35\:\text{V}$ and, when a $10\:\text{V}$ source was connected you then got $1.125\:\text{A}$. So the Thevenin resistance is \\$\frac{10\:\text{V}-\left(-35\:\...
• 11.2k

### BJT four-resistor bias circuit analysis, parallel resistors

The answer to your question depends on the node which is used to "look" into the circuit. 1.) When you look into the circuit from the upper node (Vcc) you see a resistor which equals a ...
• 27.4k

### How to find current for Thevenin equivalent circuit

The problem is that I don't know how to calculate the current flowing into the output when generators are short circuited. The result should be I = V_in/R1, but the current after R1 will split in the ...
• 131k