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| 5VB1资料 | |
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5VB1 PDF Download |
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File Size : 116 KB
Manufacturer:TYCO / CORCOM Description:which increment. When the chord bits increment, the step bits double their voltage weighting. This results in an effec- tive resolution of six bits (sign + chord + four step bits) across a 42 dB dynamic range (seven chords above 0, by 6 dB per chord). In a sampling environment, Nyquist theory says that to properly sample a continuous signal, it must be sampled at a frequency higher than twice the signals highest frequency component. Voice contains spectral energy above 3 kHz, but its absence is not detrimental to intelligibility. To reduce the digital data rate, which is proportional to the sampling rate, a sample rate of 8 kHz was adopted, consistent with a band- width of 3 kHz. This sampling requires a lowCpass filter to limit the high frequency energy above 3 kHz from distorting the inCband signal. The telephone line is also subject to 50/60 Hz power line coupling, which must be attenuated from the signal by a highCpass filter before the analogCtoC digital converter. The digitalCtoCanalog conversion process reconstructs a staircase version of the desired inCband signal, which has spectral images of the inCband signal modulated about the sample frequency and its harmonics. These spectral images are called aliasing components, which need to be attenuated to obtain the desired signal. The lowCpass filter used to at- tenuate these aliasing components is typically called a re- construction or smoothing filter. The 5VB1 PCM CodecCFilter has the codec, both presampling and reconstruction filters, and a precision volt- age reference onCchip. |
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| 1PCS | 100PCS | 1K | 10K | ||
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型 号：5VB1 厂 家：TYCO / CORCOM 封 装： 批 号：07+ 数 量：2905 说 明：原装正品 |
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运 费：所有运费均有我司承担 所在地：深圳 新旧程度： |
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| 联系人：申小姐 |
| 电 话：0755-83330991,0755-83047629 |
| 手 机：15811820920 |
| QQ：2355514181 |
| MSN：chipstech-int@hotmail.com |
| 传 真：0755-61658118 |
| EMail：sales@chipstech-int.com |
| 公司地址： 深圳市福田区中航路鼎城国际1017 |
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1. 所有我司提供的货物，均为原厂原装正品！ 2. 我们的报价是不含税价格。含税需要增加相应的税点。
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