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参数资料
| 型号： | TDA2030-TB5-T |
| 厂商： | UNISONIC TECHNOLOGIES CO LTD |
| 元件分类： | 音频／视频放大 |
| 英文描述： | 14 W, 1 CHANNEL, AUDIO AMPLIFIER, ZFM5 |
| 封装： | TO-220B, 5 PIN |
| 文件页数： | 2/13页 |
| 文件大小： | 207K |
| 代理商： | TDA2030-TB5-T |
TDA2030
LINEAR INTEGRATED CIRCUIT
UNISONICTECHNOLOGIESCO.,LTD
10 of 13
www.unisonic.com.tw
QW-R107-004,D
TRANSIENT INTER-MODULATION DISTORTION(TIM)
Transient inter-modulation distortion is an unfortunate phenomena associated with negative-feedback amplifiers.
When a feedback amplifier receives an input signal which rises very steeply, i.e. contains high-frequency
components, the feedback can arrive too late so that the amplifiers overloads and a burst of inter-modulation
distortion will be produced as in Fig.5. Since transients occur frequently in music this obviously a problem for the
designed of audio amplifiers. Unfortunately, heavy negative feedback is frequency used to reduce the total harmonic
distortion of an amplifier, which tends to aggravate the transient inter-modulation (TIM situation.)
20 to 40W
Amplifier
20 to 40W
Amplifier
20 to 40W
Amplifier
20 to 40W
Amplifier
PRE AMPLIFIER
POWER
AMPLIFIER
FEEDBACK
PATH
INPUT
V1
V2
V3
V4
OUTPUT
V1
V2
V3
V4
Fig.4 High power active box for musical instrument
Fig.5 Overshoot phenomenon in feedback amplifiers
The best known method for the measurement of TIM consists of feeding sine waves superimposed onto square
wavers, into the amplifier under test. The output spectrum is then examined using a spectrum analyzer and
compared to the input. This method suffers from serious disadvantages: the accuracy is limited, the measurement is
a tatter delicate operation and an expensive spectrum analyzer is essential.
The "inverting-sawtooth" method of measurement is based on the response of an amplifier to a 20KHz saw-tooth
wave-form. The amplifier has no difficulty following the slow ramp but it cannot follow the fast edge. The output will
follow the upper line in Fig.6 cutting of the shade area and thus increasing the mean level. If this output signal is
filtered to remove the saw-tooth, direct voltage remains which indicates the amount of TIM distortion, although it is
difficult to measure because it is indistinguishable from the DC offset of the amplifier. This problem is neatly avoided
in the IS-TIM method by periodically inverting the saw-tooth wave-form at a low audio frequency as shown in
Fig.7. In the case of the saw-tooth in Fig. 8 the mean level was increased by the TIM distortion, for a saw-tooth in the
other direction the opposite is true.
m2
m1
SR(V/ s)
Input
Signal
Filtered
Output
Siganal
Fig.6 20kHz sawtooth waveform
Fig.7 Inverting sawtooth waveform
相关PDF资料 |
PDF描述 |
|---|---|
| TDA2030L-TA5-T | 14 W, 1 CHANNEL, AUDIO AMPLIFIER, SFM5 |
| TDA2030L-TB5-T | 14 W, 1 CHANNEL, AUDIO AMPLIFIER, ZFM5 |
| TDA2030A-TA5-T | 18 W, 1 CHANNEL, AUDIO AMPLIFIER, SFM5 |
| TDA2030A-TB5-T | 18 W, 1 CHANNEL, AUDIO AMPLIFIER, ZFM5 |
| TDA2030AL-TA5-T | 18 W, 1 CHANNEL, AUDIO AMPLIFIER, SFM5 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| TDA2030V | 功能描述:音频放大器 14W Hi-Fi Audio Amp RoHS:否 制造商:STMicroelectronics 产品:General Purpose Audio Amplifiers 输出类型:Digital 输出功率: THD + 噪声: 工作电源电压:3.3 V 电源电流: 最大功率耗散: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:TQFP-64 封装:Reel |
| TDA2030V | 制造商:STMicroelectronics 功能描述:IC AUDIO AMP 14W |
| TDA2030音频功率放大器 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:TDA2030音频功率放大器 |
| TDA2039 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:TDA2039具有静音和待机功能的8W单声道或4W双声道音频功放电路. |
| TDA2039A | 制造商:未知厂家 制造商全称:未知厂家 功能描述:TDA2039 是一块具有静音和待机功能的8W 单声道或4W 双声道音频功放电路，该电路最适合用在多媒体音响和电视伴音系统。TDA2039A可以根据要求使用立体声和BTL 单声道功能，TDA2039B只能使用BTL 单声道功能。 |
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