Many existing audio amplifiers employ various error-correction techniques somewhat different from ordinary feedback. Out of these techniques two generalized error-correction structures might be singled out, each consisting of main and auxiliary channels. The subsidiary amplifier operates with an error signal caused by the departure of the main path from its desired value. Transfer functions, sensitivities of overall gain to changes, and stability criteria are determined separately for each error-correction structure. It is shown that, except for genuine feedforward, other topologies have no advantages over ordinary feedback as far as sensitivity to changes in the main amplifier are concerned. Feedforward frequency compensation is considered as a specific example of an error-correction structure with active error feedback. The aspects of the feedforward compensation by means of parallel summing are discussed in detail.
https://www.aes.org/e-lib/browse.cfm?elib=7886
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
Start a discussion about this paper!
