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Wienbridge oscillator à la Jim Williams

Jim Williams was probably one of the best and most productive analog designers of the 20th century. He has written many application notes and design briefs in his career as application engineer for Linear Technology. Of course, it featured parts manufactured by his employer. His biggest contribution in the field of analog design, is […]

Brickwall audio filter

For my 40mDC receiver, i was looking for a good audio filter that I might reuse for multiple receivers. While browsing in old magazines I came across a filter designed by Robert Penfold. It was featured in an article in Ham Radio Today March 1986 (see download section).

The brickwall audio filter […]