Thermal + Quantization Noise Floor Analog input = -35dBFS Nfloor -78.2 dBFS Signal-to-Noise Ratio Analog in = -2dBFS fIN = 70MHz SNR 73.6 dB Spurious-Free Dynamic Range Analog in = -2dBFS fIN = 70MHz SFDR 84 dB Signal-to-Noise-and-Distortion Analog in = -2dBFS fIN = 70MHz SINAD...
所以输出其实是一个阶梯曲线。 再结合前面说的环境噪声、也称作热噪声(thermal),那么一个ADC的总噪声就是热噪声和量化噪声的平方和再开方。 是不是看到这里就有点上头了,这个其实只是刚开始。对于一个给定的ADC来说,我们要去量化和测量它的这两个噪声,这样才能更好的...
The signal-to-noise ratio (SNR) of an ADC is the ratio of the signal power to the non-signal power. Non-signal power includes thermal noise, quantization noise, and other residual errors in the converter, measured in the Nyquist bandwidth (fSAMPLE/2) of the ADC. SNR is typically defined...
Daniel Terlep
再结合前面说的环境噪声、也称作热噪声(thermal),那么一个ADC的总噪声就是热噪声和量化噪声的平方和再开方。 是不是看到这里就有点上头了,这个其实只是刚开始。对于一个给定的ADC来说,我们要去量化和测量它的这两个噪声,这样才能更好的、有针对性的设计包含ADC的整个系统。
Thermal + Quantization Noise Floor Analog input = -35dBFS Nfloor 69.3 dBFS Signal-to-Noise Ratio Analog in = -0.2dBFS fIN = 32.5MHz fIN = 175MHz SNR 68.366.8 dB Spurious-Free Dynamic Range Analog in = -0.2dBFS fIN = 32.5MHzfIN = 175MHz SFDR 82.479.7 dB Signal-to-Noise...
Noise floor(without thermal noise) Nfloor_cal = -snr-10*log10(N/2)*ones(1, N/2); % Noise floor(with thermal noise) plot(linspace(1/N, 1/2, N/2), Nfloor_ideal); plot(linspace(1/N, 1/2, N/2), Nfloor_cal); str = ["";"Ideal noise floor(with only quantization noise)$...
The largest source of noise is the thermal noise in the resistance of the FET reset switch. This noise may have a typical value of 100 to 300 electrons rms (approximately 60 to 180mV rms). This noise occurs as a sample-to-sample variation in the CCD output level and is common to ...
noise figure requirements (receiver sensitivity) and maximum blocker requirements without implementing some amount of automatic gain control (AGC). The AGC can be included either in the RF or IF stages (or both). When higher resolution converters are used, the thermal + quantization noise is ...
The SNR is estimated based on ADC3664 thermal noise of 77.5 dBFS and input signal at -1dBFS. Table 9-4. ADC SNR performance across vs input frequency for different amounts of external clock jitter INPUT FREQUENCY TJ,EXT = 100 fs TJ,EXT = 250 fs TJ,EXT = 500 fs TJ,EXT = 1 ps ...