Requires? Can you give an example?Depends upon how many transistors and other discrete parts the circuit requires.
Thx
Requires? Can you give an example?Depends upon how many transistors and other discrete parts the circuit requires.
Surprising, I would have thought AC would be harder.You can make a decent small signal AC amplifier with one transistor. But a DC amplifier is an entirely different thing.
That entirely depends upon what you want the circuit to do.Requires? Can you give an example?
Can you be more specific?That entirely depends upon what you want the circuit to do.
Can you?Can you be more specific?
My op.Can you?
Fantastic observation!Before rejecting op amps as noisy, you might want to consider how much noise you get from a 1000 ohm resistor.
What's op?My op.
Then why did you mention it earlier if it's a red herring?For my purpose, tbh, I don't care about noise.
Depends completely on the application and switching requirements.I'm doing a switching application, so I think noise is irrelevant. More important is cost, parts count, and number of solder points. And getting close to the metal, ie all things being roughly equal, prefer discrete component to black box.
original postWhat's op?
cuz noise is worth mentioning in general, regardless of my specific purpose. aside from noise, the other benefits mentioned in the vid are relevant to my purpose. Also, noise near the threshold is a potential consideration.Then why did you mention it earlier if it's a red herring?
AC is easier because transistor amplifiers need a bias voltage to operate. You just stick capacitors at the input and output, and this removes the constant bias voltages. For a DC amplifier, they must operate with a bias of zero, which you cannot do with a single transistor circuit.Surprising, I would have thought AC would be harder.
ok, here's a thought. My signal is a positive-only staircase. My desired output is a positive-only staircase of exactly twice the amplitude. Perhaps i could use a coupling cap at the input, allowing me to do AC amplification. Then, restore the DC offset at the output, giving me a the positive-only signal i want.AC is easier because transistor amplifiers need a bias voltage to operate. You just stick capacitors at the input and output, and this removes the constant bias voltages. For a DC amplifier, they must operate with a bias of zero, which you cannot do with a single transistor circuit.
Bob
I agree. I too like to understand the "discrete logic" of circuits, but there comes a point in which using an ic is not just practical but realistic too.You won't do that with a single transistor. Use a friggin' op amp, despite what you learned on someone's youtube video.
Bob
Correct.I'm assuming the slight amount of negative swing is due to the diode voltage-drop?
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