It is correct that a 14-bit AD-Converter exhibits an effective signal to noise ratio of only 75dB. However, this value comprises for the whole bandwidth of 32MHz. By filtering appropriately and therefore reducing the bandwidth B, a process gain of P = 10*Log10(32MHz/B) can be achieved. With B=2400Hz, the process gain results in ca. 41dB, therefore the dynamic range is increased to 75 + 41 = 116dB.
Sunday, November 3, 2013
How is it possible to achieve a dynamic range of 112dB with a resolution of just 14 bits?
It is correct that a 14-bit AD-Converter exhibits an effective signal to noise ratio of only 75dB. However, this value comprises for the whole bandwidth of 32MHz. By filtering appropriately and therefore reducing the bandwidth B, a process gain of P = 10*Log10(32MHz/B) can be achieved. With B=2400Hz, the process gain results in ca. 41dB, therefore the dynamic range is increased to 75 + 41 = 116dB.
Subscribe to:
Post Comments (Atom)
No comments:
Post a Comment