4. SIGNAL-TO-NOISE-AND-DISTORTION RATIO (SINAD)信纳比(SINAD,或S/(N + D))是均方根信号幅值与所有其他谱分量的平方和根的平均值的比值,包括谐波,但不包括直流。SINAD很好地反映了ADC的整体动态性能,因为它包括了所有构成噪声和失真的部分。5. 信噪比 SNR 信噪比计算公式如下,与SINAD区别是计算时排除谐波...
在描述一个系统的THD+N值时,还必须指明该THD+N值是在什么情况下测得的,包括测试信号(基波)的频率、谐波和噪声计算的频率范围、信号的幅度、以及对噪声和失真是否按听感进行了加权(A、B、C、ITU-R 468、ITU-R ARM)等。 2.3 信纳比SINAD (Signal to Nosie and Distortion Ratio) 信纳比SINAD通常定义为信号总...
THD+N is another scale used for expressing the sound quality of an audio power amplifier. It means total harmonic distortion plus noise. THD+N is very commonly used now a days and it covers almost every type of corruption present in the signal. THD+N can be defined as the ratio of the...
Maximum output level is -1.5 dBV (around 95 dB THD+N ratio), providing over 20 mW into a typical 32-ohm headphones – more than enough for any portable headphones. I’ve had my OnePlus 3 phone since last October. Generally I have been very happy with it, excellent value for money. I...
运放的THD+N和位数 对于运放的THD+N和位数该如何理解理解(有效位数ENOB=(SINAD-1.76)/6.02) Definition An often used definition for ENOB is , where all values are given in dB, and SINAD is the ratio indicating the quality of the signal
4、信噪比SNR（Signalto Nosie Ratio）的定义 信噪比SNR通常定义为信号基波功率与噪声功率的比值的开方，...
(h)谐波频率与基波频率的整数比3.63皆波含量(电压或电流)harmonic content (for voltage or current)从周期性交流量中减去基波分量后所得的量3.7谐波含有率harmonic ratio (HR)周期性交流量中含有的第h次谐波分量的方均根值与基波分量的方均根值之比(用百分数表示)第h次谐波电压含有率以HRUh表示第h次谐波电流...
fs = 5e4; f0 = 2.5e3; N = 1024; t = (0:N-1)/fs; ct = cos(2*pi*f0*t); cd = ct + 0.00005*randn(size(ct)); amp = [1e-5 5e-6 -1e-3 6e-5 1 25e-3]; sgn = polyval(amp,cd); thd(sgn,fs); The plot shows the spectrum used to compute the ratio and the regio...
这就要看第二个旋钮Ratio了。Ratio叫做压缩比,你可以这样理解,比如2:1,就是说每超过阈值2dB,就会被压下去1dB。4:1呢那就是超过阈值的按4分之一的比例压缩。在BC1上竟然还有1.5:1,这种轻压缩的参数是大多数压缩器所没有提供的,在1.5:1和2:1的设置下,压缩曲线会是一个非常细微的软拐点。
EVM Test Result by customer Po=50mW, THD+N Ratio=0.41% Po=50mW THD+N Ratio=0.04%(Datasheet P8-Fig.13) <Customer's Test Setup> /TPA2038D1YFFEVM Rev D Vdd=+5.0V, RL=8Ω, Gain=+6dB /Audio Precision SYS2722 internal 20~20KHz filter used ...