Discussion Overview
The discussion revolves around understanding the peak closed loop gain of an operational amplifier (op-amp) circuit as represented in a Bode plot. Participants explore theoretical approaches to determine where peak gain should occur and whether such information is available in the op-amp's datasheet. The conversation includes considerations of resonance in the gain at specific frequencies.
Discussion Character
- Exploratory
- Technical explanation
- Debate/contested
Main Points Raised
- One participant seeks to understand if a resonance in the gain at a measured frequency can be theoretically justified and whether this information is available in the datasheet.
- Another participant describes the typical behavior of Bode plots for op-amps, noting that they usually show flat gain until the first pole and then a roll-off, suggesting that resonances are uncommon.
- A link to an external resource is provided to illustrate the concept of open loop and closed loop gains of an op-amp.
- A later reply reflects on the initial observation, suggesting that what was perceived as resonance may actually be a transition point in the gain curve rather than a true resonance.
Areas of Agreement / Disagreement
Participants express differing views on the presence of resonance in op-amp gain plots, with some suggesting it is unlikely while others are exploring the possibility. The discussion remains unresolved regarding the specific characteristics of the gain at the measured frequency.
Contextual Notes
The discussion does not clarify the definitions of open loop gain or feedback factor as they relate to the specific circuit in question, nor does it resolve the mathematical steps needed to analyze the Bode plot fully.