"Bret Ludwig" wrote in message
oups.com

As an aside Jim Williams of Linear Technology has written
very intelligent pieces on HP Wien-bridge oscillators and
building an improved solid state version. I doubt it is
on the web but you may be better at finding it than me.

The name of the article is:

"Max Wien, Mr. Hewlett and a Rainy Sunday Afternoon", included in the book
"Analog Circuit Design: Art, Science and Personalities" . See Amazon, etc.