Class-T amplifier

Among the publicly disclosed differences is real time control of the switching frequency depending on the input signal and amplified output.

Currently available implementations use a loop similar to a higher order Delta-Sigma (ΔΣ) (or sigma-delta) modulator, with an internal digital clock to control the sample comparator.

The two key aspects of this topology are that (1), feedback is taken directly from the switching node rather than the filtered output, and (2), the higher order loop provides much higher loop gain at high audio frequencies than would be possible in a conventional single pole amplifier.

Financial difficulties caused Tripath to file for Chapter 11 bankruptcy protection on 8 February 2007.

Tripath used to sell the amplifiers as chips, or as chipsets, to be integrated into products by other companies in several countries.