Chapter 22

Power Supply Design

We thought, because we had power, we had wisdom.”

Stephen Vincent Benet: Litany for Dictatorships, 1935

Opamp Supply Rail Voltages

Running opamps at ±17 V rather than ±15 V gives an increase in headroom and dynamic range of 1.1 dB for virtually no cost and with no reliability penalty. This assumes that the opamps concerned have a maximum supply voltage rating of ±18 V, which is the case for the old Texas TL072, the new LM4562, and many other types.

The 5532 is (as usual) in a class of its own. Both the Texas and Fairchild versions of the NE5532 have an absolute maximum power supply voltage rating of ±22 V (though Texas also gives a “recommended supply voltage” of ±15 V), but I have never met any attempt to make ...

Get The Design of Active Crossovers, 2nd Edition now with the O’Reilly learning platform.

O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.