Differential Rumble Filter (Elliptic EQ) Wireless World
Posted: 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
"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