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參數(shù)資料
| 型號： | RB-TK2050 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 元件分類： | 運動控制電子 |
| 英文描述： | CLASS-T DIGITAL AUDIO AMPLIFIER 1 CHANNEL TK2050 REFERENCE BOARD |
| 中文描述： | 類- T的數(shù)字音頻放大器1頻道TK2050的參考電路板 |
| 文件頁數(shù)： | 4/13頁 |
| 文件大?。?/td> | 415K |
| 代理商： | RB-TK2050 |
Tripath Technology, Inc. - Technical Information
4 RB-TK2050 Parallel, Kli/Rev 1.0/ 11.02
PERFORMING MEASUREMENTS ON THE RB-TK2050 Parallel Reference Board:
The TK2050 operates by generating a high frequency switching signal based on the audio input.
This signal is
sent through a low-pass filter that recovers an amplified version of the audio input
.
The frequency of the
switching pattern is spread spectrum in nature and typically varies between 100kHz and 1MHz, which is well
above the 20Hz – 20kHz audio band. The pattern itself does not alter or distort the audio input signal, but it
does introduce some inaudible components.
The measurements of certain performance parameters, particularly noise related specifications such as
THD+N, are significantly affected by the design of the low-pass filter used on the output as well as the
bandwidth setting of the measurement instrument used. Unless the filter has a very sharp roll-off just beyond
the audio band or the bandwidth of the measurement instrument is limited, some of the inaudible noise
components introduced by the TK2050 amplifier switching pattern will degrade the measurement by including
out of band (audio) energy.
One feature of the TK2050 is that it does not require large multi-pole filters to achieve excellent performance in
listening tests, usually a more critical factor than performance measurements. Though using a multi-pole filter
may remove high-frequency noise and improve THD+N type measurements (when they are made with wide-
bandwidth measuring equipment), these same filters degrade frequency response. The RB-TK2050 Parallel
Reference Board has a simple two-pole output filter with excellent performance in listening tests.
(See Application Note 4 for additional information on bench testing)
Contact Information
TRIPATH TECHNOLOGY, INC
2560 Orchard Parkway, San Jose, CA 95131
408.750.3000 - P
408.750.3001 - F
For more Sales Information, please visit us @
www.tripath.com/cont_s.htm
For more Technical Information, please visit us @
www.tripath.com/data.htm
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