The item you've selected was not added to your cart. Best Offer:. Make Offer. Add to Watchlist Unwatch. Watch list is full. Ships from Germany. Located in:. This amount is subject to change until you make payment. For additional information, see the Global Shipping Program terms and conditions - opens in a new window or tab This amount includes applicable customs duties, taxes, brokerage and other fees.
For additional information, see the Global Shipping Program terms and conditions - opens in a new window or tab. Estimated on or before Wed. Delivery time is estimated using our proprietary method which is based on the buyer's proximity to the item location, the shipping service selected, the seller's shipping history, and other factors. Delivery times may vary, especially during peak periods. Seller does not accept returns See details. Any international shipping and import charges are paid in part to Pitney Bowes Inc.
Learn More - opens in a new window or tab International shipping and import charges paid to Pitney Bowes Inc. Learn More - opens in a new window or tab Any international shipping and import charges are paid in part to Pitney Bowes Inc. Learn More - opens in a new window or tab Any international shipping is paid in part to Pitney Bowes Inc. Learn More - opens in a new window or tab. Related sponsored items. Showing Slide 1 of 3. Parts only Parts only Parts only.
New New New. Free shipping Free shipping Free shipping. Seller Pre-owned Pre-owned Pre-owned. Report item - opens in a new window or tab. Seller assumes all responsibility for this listing. Item specifics. For parts or not working: An item that does not function as intended and is not fully operational.
Read more about the condition For parts or not working: An item that does not function as intended and is not fully operational. This includes items that are defective in ways that render them difficult to use, items that require service or repair, or items missing essential components.
See all condition definitions opens in a new window or tab. Xc Shipping and handling. This item will ship to Germany , but the seller has not specified shipping options.
Contact the seller - opens in a new window or tab and request a shipping method to your location. Shipping cost cannot be calculated. Please enter a valid ZIP Code. In the case of CD sound, fidelity is an important goal, so the sampling rate is 44, samples per second At this level, the output of the DAC so closely matches the original wave form that the sound is essentially "perfect" to most human ears.
The DAC typically uses a different resistor for each bit. A 4-bit DAC needs 4 resistors working in parallel to provide a steady analog signal. When you get to the bit or even bit level found in CDs and DVDs , the number of gradations required per resistor makes it very difficult to precisely match values. For example, a typical bit DAC would have 16 resistors requiring a total of 65, gradations. Essentially, this type of DAC does not use a bank of resistors operating in parallel.
Instead, it creates a carefully modulated signal from the digital. The converter relies on noise shaping , a phenomenon that takes advantage of the human ear's inability to notice noise when it occurs in higher frequencies. Basically, the human ear is most sensitive to noise at 5 KHz, and is almost unable to detect it at 20 KHz.
A key part of the converter is a circuit called a delta-sigma modulator , which takes the binary signal 1s and 0s from the CD and changes them to a steady pulse, called a pulse train. The pulse train contains an average of the change in the amount of energy represented in the sample. A low-pass filter removes all time-domain information and recovers only the average energy of the pulse train that feeds it.
The key here is to understand that the pulse-train waveform is clocked at a very high frequency compared to the The pulse train is sent through the DAC and changed into an analog signal. The error signal is used by the low-pass filter to average the analog signal.
Basically, this means that minute adjustments are made to the analog signal to compensate for the differences between the binary signal and the pulse train. This page provides incredible detail and diagrams of the entire circuit, as well as a detailed explanation of the process. Sign up for our Newsletter!
Mobile Newsletter banner close. Mobile Newsletter chat close. Mobile Newsletter chat dots. Mobile Newsletter chat avatar. Mobile Newsletter chat subscribe.
0コメント