Post History
What we call this opamp configuration? A mess. What's the advantage and the disadvantage of this circuit? This can't be judged without the stated objectives. It might be useful for keepi...
Answer
#3: Post edited
by
Olin Lathrop
·
2023-01-16T13:39:59Z (almost 2 years ago)
<blockquote>What we call this opamp configuration?</blockquote>- A mess.
- <blockquote>What's the advantage and the disadvantage of this circuit?</blockquote>
- This can't be judged without the stated objectives. It might be useful for keeping undergrads busy trying to analyze this circuit.
- <blockquote>And what's the purpose of the L2 in the feedback?</blockquote>
- None the way the circuit is drawn. Ideal opamps have infinite input impedance, meaning no current flows into or out of the inputs. With no current flowing thru it, L2 doesn't "do" anything.
- It's hard to guess what went wrong or what was intended, but L2 should be working against some finite impedance, and was probably intended to be in the negative feedback path.
- Again, it's impossible to evaluate a circuit without specs for what it's supposed to do. Any inputs and outputs also need to be defined as to what they are supposed to receive or produce.
- <blockquote>What we call this opamp configuration?
-
- <img src="https://electrical.codidact.com/uploads/vjdc7qojizeooloxf92lapsywpnm">
- </blockquote>
- A mess.
- <blockquote>What's the advantage and the disadvantage of this circuit?</blockquote>
- This can't be judged without the stated objectives. It might be useful for keeping undergrads busy trying to analyze this circuit.
- <blockquote>And what's the purpose of the L2 in the feedback?</blockquote>
- None the way the circuit is drawn. Ideal opamps have infinite input impedance, meaning no current flows into or out of the inputs. With no current flowing thru it, L2 doesn't "do" anything.
- It's hard to guess what went wrong or what was intended, but L2 should be working against some finite impedance, and was probably intended to be in the negative feedback path.
- Again, it's impossible to evaluate a circuit without specs for what it's supposed to do. Any inputs and outputs also need to be defined as to what they are supposed to receive or produce.
#2: Post edited
by
Olin Lathrop
·
2023-01-15T23:57:16Z (almost 2 years ago)
- <blockquote>What we call this opamp configuration?</blockquote>
- A mess.
- <blockquote>What's the advantage and the disadvantage of this circuit?</blockquote>
This can't be judges without the stated objectives. It might be useful to keep undergrads busy trying to analyze this circuit.- <blockquote>And what's the purpose of the L2 in the feedback?</blockquote>
- None the way the circuit is drawn. Ideal opamps have infinite input impedance, meaning no current flows into or out of the inputs. With no current flowing thru it, L2 doesn't "do" anything.
- It's hard to guess what went wrong or what was intended, but L2 should be working against some finite impedance, and was probably intended to be in the negative feedback path.
Again, it's impossible to evaluate a circuit without specs for what it's supposed to do. Any inputs and outputs also need to be defined as to what the are supposed to receive or produce.
- <blockquote>What we call this opamp configuration?</blockquote>
- A mess.
- <blockquote>What's the advantage and the disadvantage of this circuit?</blockquote>
- This can't be judged without the stated objectives. It might be useful for keeping undergrads busy trying to analyze this circuit.
- <blockquote>And what's the purpose of the L2 in the feedback?</blockquote>
- None the way the circuit is drawn. Ideal opamps have infinite input impedance, meaning no current flows into or out of the inputs. With no current flowing thru it, L2 doesn't "do" anything.
- It's hard to guess what went wrong or what was intended, but L2 should be working against some finite impedance, and was probably intended to be in the negative feedback path.
- Again, it's impossible to evaluate a circuit without specs for what it's supposed to do. Any inputs and outputs also need to be defined as to what they are supposed to receive or produce.
#1: Initial revision
by
Olin Lathrop
·
2023-01-15T22:19:02Z (almost 2 years ago)
<blockquote>What we call this opamp configuration?</blockquote> A mess. <blockquote>What's the advantage and the disadvantage of this circuit?</blockquote> This can't be judges without the stated objectives. It might be useful to keep undergrads busy trying to analyze this circuit. <blockquote>And what's the purpose of the L2 in the feedback?</blockquote> None the way the circuit is drawn. Ideal opamps have infinite input impedance, meaning no current flows into or out of the inputs. With no current flowing thru it, L2 doesn't "do" anything. It's hard to guess what went wrong or what was intended, but L2 should be working against some finite impedance, and was probably intended to be in the negative feedback path. Again, it's impossible to evaluate a circuit without specs for what it's supposed to do. Any inputs and outputs also need to be defined as to what the are supposed to receive or produce.