AES E-Library

AES E-Library

Characteristics of Demodulation Filters for Switching Power Amplifiers

Document Thumbnail

Over the years, there have been a large number of papers published related to switching power amplifiers. However, to the best of the author's knowledge, there has been little information published about the demodulation technique required for switching amplifiers. While the purpose of the demodulating filter is to strip the carrier frequency from the information signal, improper design and selection of passive components will seriously affect the filter's attenuating performance. This paper will explain the basics of a demodulating filter; showing attenuation responses of different structures and number of stages. The selection of component values and types, as well as their affects on cost and attenuation performance, will also be discussed. Finally, this work will analyze simulation responses of LC filters modeled with parasitics that can be compared to real LC filters.

AES Convention: Paper Number:
Publication Date:

Click to purchase paper as a non-member 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 $33 for non-members and is free for AES members and E-Library subscribers.

Learn more about the AES E-Library

E-Library Location:

Start a discussion about this paper!

AES - Audio Engineering Society