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36 RF, audio and high-frequency relationship?

In Electronic Infomation Category: 3 | on October 09,2011

RF (Radio Frequency, RF) is the RF current, it is a high-frequency electromagnetic waves referred to the exchange variation. Changes less than 1000 times per second, known as the low-frequency alternating current, more than 10,000 times as high-frequency current, while the radio is such a high frequency current.

Audio: Audio signal is a continuous analog signal, the audio signal on the formation of a continuous sound. The most common way is through the pulse code modulation PCM (Pulse Code Modulation) digital audio features. Sampling frequency sound wave is the number of times per second sampling. According to this sampling method, sampling frequency is able to reproduce the sound frequency doubled. Upper limit of human hearing frequency around 20 kHz in order to ensure sound without distortion, 40 kHz sampling frequency should be about. Commonly used sampling frequency of 11.025 kHz, 22.05 kHz and 36 datasheet and 44.1 kHz and 36 price and so on. The higher the sampling frequency, the smaller the distortion sound, the greater the amount of audio data.

37. What is white noise?

resistance and 36 suppliers and the transistor thermal noise power spectral density is a constant independent of frequency, that is, in a very wide band, thermal noise has a uniform power spectrum, this noise is often referred to as " white noise. "

36 datasheet36 suppliers36 Price

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