A Regulated Low-Pass Filter Based on Pulse Width Modulation
Regulated filters are often used in disk recording systems to prevent cutting of extreme high-frequency transients which may be impossible to play back. The paper describes a system utilizing an active Bessel-type filter in which the resistive components are varied by a pulse-width modulated square-wave signal of supersonic frequency.
Click to purchase paper or login as an AES member. If your company or school subscribes to the E-Library then switch to the institutional version. If you are not an AES member and would like to subscribe to the E-Library then Join the AES!
This paper costs $20 for non-members, $5 for AES members and is free for E-Library subscribers.