defgf67ay
Dołączył: 29 Paź 2010
Posty: 863
Przeczytał: 0 tematów
Ostrzeżeń: 0/5
Skąd: England
|
 Wysłany: Śro 14:40, 08 Gru 2010 Temat postu: ghd haarglätter Oversampling digital filter techno |
 |
|
Oversampling digital filter technology and its development process
The fluctuation is less than-I-0. O00000038dB steep ultra-high performance of the 941-order FIR digital filter roll-off type. When the mode selection, by switching ROM can also change it into a slow roll-type FIR digital filter,[link widoczny dla zalogowanych], you can enjoy the noise caused by the collapse of the hypersonic effect. September, 16fsD / A conversion and times of the emergence of the available processors in the development of NEC in l988 \2008, No. 10, 93 'staggered half a clock cycle of each normal phase and reverse signals. These two signals were sent to different D / A converter for digital-analog conversion and differential amplifier with two converter output signal subtraction in order to achieve the average insertion. The D / A conversion can be the equivalent of a digital signal 8f 16f of the analog signal. This approach has many advantages, in addition to the advantages of analog filters can be simplified, but also with the S / N improvement of 3dB can be obtained, DIA converter can even filter the distortion components cancel each other out,[link widoczny dla zalogowanych], and the output voltage can be decomposed force improve a letter, the DC offset circuit components can be DC-coupled,[link widoczny dla zalogowanych], D / A converter components can cancel each other out and the peak sample and hold circuit, and many do not sound favorable to the advantages. Photo 5 is the first CD using the technology of a CD player 830DS, photo 6, 8 times oversampling and 16-fold over the 20kHz/OdB positive sample waveform, can be seen by comparing significantly different between the two . NEC was slightly lower in grade CD player CD a 816 $ DCD-10 were used in the technology, CD-10's D / A converter circuit 14 as shown, the signal circuit board as shown in photo 7. Ten, 64 times the sampling unit and then the United States debut in 1988 the company introduced a WADIA Wadia2000 the machine model (photo  ,[link widoczny dla zalogowanych], in the aircraft type in use for some 16 times oversampling and 4 D / A converter composed of moving average type DIA converter, real audio and video technology is the practical equivalent of 64 times oversampling of the analog output. Photo 9 photo inside the host, the signal system components shown in Figure 15. In the host device has a capacity of four DSP @ fl E2PROR 64k bit memory, under the control of the clock signal, so that four DSP parallel to the rate of 36MHz, the speed of operations per second 72 million order, at the time to that speed is very high. By the way, was a 9801 personal computer PC clock frequency is only 12MHz. Figure 16 is a FIR digital filter using the DSP's basic structure, Figure 17 is to use it as a type 16 times over sampling the signal waveform and the circuit diagram of the three shift register with input data series in order to move the 16 per quarter of a cycle, a cycle of 64, then the input data and three, respectively, after moving the data into four 18-bit D / A converter. DIA converter, the four analog output signals into the sum of the average achieved, by this method is equivalent to 64fJ ~ sampling the analog signal. WADIA companies means that the circuit named \Because doing so, both in the vertical direction or horizontal direction of the multiples of 4 times, can be equivalent to 64f0 times the D / A converter waveforms and analog filters do not need to draw a line. In the machine in order to prevent radiation of high frequency noise impact of deliberately setting a LC filter, not using the domain would affect the audible analog with low-pass filter. In order to achieve some type l6 times oversampling, but also specifically the order of less developed FIR digital filters, filter cut-off characteristics shown in Figure 18, a 3dB at 20kHz at the decline,[link widoczny dla zalogowanych], is a slow roll-off characteristics. Photo l0 is a MSBTechnology production oversampling digital filter 16 times the circuit board. The circuit board can 192kHz/24bL special type of signal for a period of operation l6 times oversampling digital filter cutoff characteristic is the steep roll-off characteristics. Even if the signal is 384kHz124bL special can be 8 times oversampling operation, its processing capacity truly exceptional. Photo child is DigitalDomai company's top D / D converter for a twitter 1a, the use of the photos in the machine lD Lu kg, 16 times oversampling said digital filter circuit boards. Round
More articles related to topics：
[link widoczny dla zalogowanych]
[link widoczny dla zalogowanych]
p90x workout calendar ADTC build China's digital T
Post został pochwalony 0 razy
|
|
