![]() ![]() ![]() Audio Research, an audio electronics company, formerly an exclusive tube circuit specialist, produced a Tripath-based audiophile amplifier.Apple Computer used them in their Power Mac G4 Cube, Power Mac G4 (Digital audio), eMac and iMac (Flat Panel) computers.Sony, Panasonic and Blaupunkt use them in several car stereos and integrated home cinema systems.Tripath used to sell the amplifiers as chips, or as chipsets, to be integrated into products by other companies in several countries. Tripath's stock and intellectual property were purchased later that year by Cirrus Logic. 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.īlaupunkt PA2150 T-Amp, "Powered by Tripath"įinancial difficulties caused Tripath to file for Chapter 11 bankruptcy protection on 8 February 2007. 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 control signals in Class T amplifiers may be computed using digital signal processing or fully analog techniques. ![]() One of the amplifiers, the TA2020, was named one of the twenty-five chips that 'shook the world" by the IEEE Spectrum magazine. Among the publicly disclosed differences is real time control of the switching frequency depending on the input signal and amplified output. The covered products use a class-D amplifier combined with proprietary techniques to control the pulse-width modulation to produce what is claimed to be better performance than other class-D amplifier designs. ![]()
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