In-phase proportional amplifier and inverting proportional amplifier (I only have a superficial understanding of it, so I won't reply, thank you)

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In-phase proportional amplifier and inverting proportional amplifier (I only have a superficial understanding of it, so I won't reply, thank you) [Copy link]

In-phase proportional amplifier and inverting proportional amplifier (I only have a superficial understanding of it, so I won't reply, thank you)

1. Is the voltage calculated by the op amp inverting proportional amplification negative? For example, if the input 5V is amplified by 1 times, it becomes -5V? Is this understanding wrong? After all, there is no charge pump and no inductor, so how can negative voltage be achieved? But the microcontroller cannot directly collect the output voltage of the inverting proportional amplification, right? So the microcontroller cannot directly collect it, which means it is a negative voltage? ? ?

2. Is the op amp in-phase proportional amplification correct? If not, how should it be calculated?

whuer

For current detection, there is a sampling resistor between PGND and GND, and two-stage in-phase proportional amplification.

Jacktang

I only have a vague understanding of it, so I bypassed it.

zhaoyanhao

Asking questions is also an art. You are not a paid member here, and you are not a RMB player. What you said makes people not want to answer. And your question is not even basic enough to make others stop at the first glance. Can you even add a "may I ask" throughout the article?