Differential Rumble Filter (Elliptic EQ) Wireless World

A resource for technical documentation. Datasheets, application notes, instruction manuals, books and links to resources are found in the Document Library.
Post Reply
User avatar
Posts: 3888
Joined: Sat Aug 11, 2007 2:34 pm
Location: Oak Cliff, Texas

Differential Rumble Filter (Elliptic EQ) Wireless World

Post by mediatechnology » Sat Jun 11, 2016 12:35 pm

This is a simple "Differential Rumble Filter" (also an Elliptic Equalizer*) from Wireless World:

"Differential Rumble Filter," J.P. Macaulay, Wireless World, Sept 1979 pg 75.

"Differential Rumble Filter," J.P.Macaulay, Wireless World, Sept 1979 pg 75.

A nice circuit. Other than perhaps its utility as buffers, the use of two inversion stages seem redundant.
The low pass-filtered outputs could be summed and a single inverter used in the interest of efficiency.

See also: http://www.renardson-audio.com/phono-1.html

Related Content:

Using the Precision MS Matrix for Mono Crossover LF Blending: https://www.proaudiodesignforum.com/for ... ?f=6&t=622
Elliptic Equalizers Using MS Matrix and LRS Width Controller https://www.proaudiodesignforum.com/for ... ?f=7&t=736
A Simple Elliptic Equalizer Using the Width Controller https://www.proaudiodesignforum.com/for ... 731&p=8465

"There's A War On For Your Mind" Banned.Video https://banned.video/
Meme World https://www.memeworld.com/
"Armstrong: Climate Change Has Been A Routine Scare Tactic Since The 1930s" https://www.zerohedge.com/news/2019-09- ... ctic-1930s

Post Reply