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DIY Op Amps - PassDiy
https://www.passdiy.com/project/amplifiers/diy-op-amps
So let's build some op amps. Step 1: Constructing a Differential Input The key to an operational amplifier is the two gain devices that form the differential input. You can build a functional op amp from this alone, although …
Discrete vs op-amp for pre-amp - diyAudio
https://www.diyaudio.com/community/threads/discrete-vs-op-amp-for-pre-amp.355119/
I am considering a high-end preamp/dac build and was thinking what would give me the best results when choosing between a high-end op-amp and discrete components like a JFET differential amplifier with a BJT push/pull output stage in class A mode. I can see that a lot of hobby builders tend to...
DIY Op Amps - PassDiy
https://www.passdiy.com/pdf/diyopamp.pdf
audio applications. How Op Amps Work First, a little tutorial on how op amps work. Fig. 1 shows an op amp, which has five connections to the outside world. Two of these are power supply rail pins, +V and -V, which for monolithic op amps usually want to be attached to supply voltages in the range of about 5 to 15 volts each for commercially ...
5 Simple Preamplifier Circuits Explained - Homemade ...
https://www.homemade-circuits.com/small-amplifier-circuit/
5 Simple Preamplifier Circuits Explained. As the name suggests a preamplifier circuit pre-amplifies a very small signal to some specified level that can be further amplified by an attached power amplifier circuit. It basically acts like a buffer stage between the input small signal source and a power amplifier.
DIY Audio Projects Forum • Single stage preamp using ...
https://diyaudioprojects.com/Forum/viewtopic.php?t=121&start=10
Vocals are clear, slightly more forward than the OP27's. The OPA627 vocals are much darker and flat compared to the opamp modules. Piano (always an excellent test) has that decay that is 'not quite there' with most of the other op-amps. The most noticeable improvement is the 'blackness' of the background.
Audio Designs With Opamps
https://sound-au.com/dwopa.htm
Designing With Opamps - Part 1. There are few audio frequency designs today that do not use operational amplifiers (op-amps, or just 'opamps'). Over the years, the poor opamp has been much maligned, with mainly spurious claims about 'audibility', distortion, and other so-called defects. There are even people who will compare the bass ...
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