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发表于 2011-8-21 13:20
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[s:20] http://www.beavisaudio.com/projects/ScreamerLab/
Stacking the opamps means that the opamps are physically soldered to each other, pin for pin, so you form a physical “stack” of opamps. In the circuit, the opamps are running in parallel. This has been considered before within the DIY community and offers a different take on opamp modification.
Jack Orman (www.muzique.com), another highly respected and knowledgeable source about such matter, has the following to say about stacking:
…what you get is increased current drive. Typically, a small value resistor, 10-50 ohms is inserted in the output of each opamp before they are combined to the signal output. This ensures that the opamps share the drive more equally. Using a pair of opamps in parallel will actually decrease the noise by about 3db due to random cancellations. Four opamps in parallel would reduce it even further, but that’s about the practical limit.”
[ 本帖最后由 i886 于 2011-8-21 13:26 编辑 ] |
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