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NE5534 buffer question
NE5534 buffer question
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Old 2nd November 2017, 11:06 AM   #1
ivanlukic is offline ivanlukic  Serbia
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Default NE5534 buffer question

What value of compensation cap between pin 5 and 8 is enough so that NE5534 can be used as unity gain buffer for line level input signals?
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Old 2nd November 2017, 11:16 AM   #2
balerit is offline balerit  South Africa
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Old 2nd November 2017, 11:58 AM   #3
gpapag is offline gpapag  Greece
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NE5534 buffer question
Acc. to Douglas Self, ~22pF
Small Signal Audio Design: Douglas Self: 9780415709736: Amazon.com: Books

The NE5532/5534 opamp
The 5532 is a low-noise, low distortion bipolar dual opamp, with internal compensation for unity-gain stability. The 5534 is a single version internally compensated for gains down to three times, and an external compensation capacitor can be added for unity-gain stability; 22 pF is the usual value. The 5532 achieves unity-gain stability by having degeneration resistors in the emitter circuits of the input transistors, to reduce the open-loop gain, and this is why it is noisier than the 5534.

In 5532 TI datasheets, I can’t see emitter resistors though

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Old 2nd November 2017, 12:24 PM   #4
Merlinb is offline Merlinb  United Kingdom
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Yep, 22pF can be relied upon.
NE5534 compensation ?
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