Op Amp pinouts was Re: [sdiy] more LM3900 stuff

[Seb Francis]

>>e transistor circuits or NE5532 or AD275 for "demanding" audio
>>circuits,
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>5532 is pretty demanding of power supply current, and low input
>impedance
>for best results. Have not tried the AD275... whats it like ???
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Maybe JH means the Analog Devices OP275 ?  I've seen this one used in 
many high-end audio circuits.

 From the datasheet..
"The OP275 is the first amplifier to feature the Butler Amplifier front 
end. This new front end design combines both bipolar and JFET 
transistors to attain amplifiers with the accuracy and low noise 
performance of bipolar transistors, and the speed and sound quality of 
JFETs. Total Harmonic Distortion plus Noise equals that of previous 
audio amplifiers, but at much lower supply currents."

Seb