Excellent video! Good job! Great to see differences between original and fake op amps.. 👍
@kartinosurodipo4520
2 жыл бұрын
You forget the most important of your test: Output LOAD! Op Amp is not voltage amplifier. It is a low power amplifier, then placing a load is a must. Without load the test have no purpose. Just check how manufacturer do test. It is always shown on each datasheet.
@PapasDino
2 жыл бұрын
Might be interesting to hear the "So what" of the op amp's phase data you covered.
@IMSAIGuy
2 жыл бұрын
that's above my pay grade
@argcargv
2 жыл бұрын
Since the output was no longer a sine wave, you were measuring slew rate not bandwidth. Bandwidth is a small signal parameter so you need to attenuate the input so that the voltage swing on the output is not slew rate limited. If you are slew rate limited the output will look more like a triangle wave than a sine wave.
@Halabaloosa
2 жыл бұрын
Great video! Why do you think your build on the OP07 rollled off about an order of magnitude earlier than the datasheet specifies? I too sometimes find it difficult meeting some of the specifications given, recently have been struggling with choppers.
@twotone3070
2 жыл бұрын
If you see the plot where the power is not on, there was already a loss at higher freq, presumably because of the inherent capacitances of the test board? His purpose was to show us the relative changes from opamp to opamp so it was not important.
@erikheidt4949
2 жыл бұрын
Great series !
@mr1enrollment
2 жыл бұрын
If you are going to continue this topic, consider an inverting amp with gain varying from: -10 -> -1 -> -0.5, this offers the opportunity to discuss stability, BW, poles,etc. (What happened to the DVM?)
@IMSAIGuy
2 жыл бұрын
Waiting for a part. Tomorrow
@mr1enrollment
2 жыл бұрын
@@IMSAIGuy Oh, I had assumed that since you reported a series of 7 videos that you had pre-recorded all of them,... my mistake.
@IMSAIGuy
2 жыл бұрын
no you are right, I WAS waiting for parts
@mr1enrollment
2 жыл бұрын
@@IMSAIGuy LOL well I am still confused, but that is a normal state of affairs. Cheers dan
@__--JY-Moe--__
2 жыл бұрын
least I know what scope 2 get! no mem button? yup! love them op-amp chip's
@MunnaKumar-sc7qo
2 жыл бұрын
Which model of Rigol oscilloscope??
@IMSAIGuy
2 жыл бұрын
kzitem.info/news/bejne/xpelro2Nkn6DiWU
@sullivanzheng9586
2 жыл бұрын
Possible to measure it by NanoVNA with an external attenuator? Guess it might be quicker? (Mag of S21 and Phase of S21)
@IMSAIGuy
2 жыл бұрын
Vna only good for 50ohm systems
@mr1enrollment
2 жыл бұрын
@@IMSAIGuy not to mention the disparity in frequency range,...
@pixiepaws99
Жыл бұрын
External signal generator works quite well for these things.
@byronwatkins2565
2 жыл бұрын
You set your cursor at -30 dB. For power, you want -3 dB. For voltage or current, you want -6 dB. Recall that 10 dB power is 20 dB voltage or current because P=I^2 R=V^2 / R.
Пікірлер: 23