AES Store

Journal Forum

Reflecting on Reflections - June 2014

Audibility of a CD-Standard A/DA/A Loop Inserted into High-Resolution Audio Playback - September 2007

Quiet Thoughts on a Deafening Problem - May 2014
1 comment

Access Journal Forum

AES E-Library

Non-Switching Amplifier

Class A and class B are basic operatin gmodes for audio power amplifiers. Since class A operation produces large amounts of heat, class B operation is commonly used. Thermal loss in class B operation is much less than in class A operation, but it usually produces high frequency switching distortion. A power amplifier which has low heat generating capacity but without significant high frequency switching distortion may be obtained by controlling the bias voltage to the power transistors in such a manner as to prevent either output transistor from being cut-off below the class B idling current at any time. Several proposals have been made for this type of operating mode but they have not always solved the problem of delayed response time or others which adversely affected the basic performance of the amplifier. The recently developed circuitry discussed below assures the high response speed of the power amplifier without adversely affecting its basic performance and prevents the power amplifier from generating high frequency switching distortion. Using this circuitry, high power output amplifiers may be designed which produce very low distortion over a very wide frequency range.

AES Convention: Paper Number:
Publication Date:

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.

Learn more about the AES E-Library

E-Library Location:

Start a discussion about this paper!

Facebook   Twitter   LinkedIn   Google+   YouTube   RSS News Feeds  
AES - Audio Engineering Society