Antialiasing filter with an improved S/N ratio
Abstract
The paper proposes a novel way to improve the S/N ratio for a CTD antialiasing filter without greatly increasing the area of power consumption. By adding a given number of consecutive charge packets at the output stage, the output data rate can be reduced until the Nyquist theorem for the output signal is violated. By summing up those charge packets, the signal is added arithmetically while the noise, which is not correlated, is added geometrically. This results in an improvement of the S/N ratio equal to the number of charge packets added. An experimental verification of this concept is discussed.
- Publication:
-
IEEE Journal of Solid-State Circuits
- Pub Date:
- February 1979
- DOI:
- 10.1109/JSSC.1979.1051156
- Bibcode:
- 1979IJSSC..14..172P
- Keywords:
-
- Charge Transfer Devices;
- Digital Filters;
- Pulse Code Modulation;
- Signal Processing;
- Signal To Noise Ratios;
- Analog To Digital Converters;
- Data Sampling;
- Digital To Analog Converters;
- Energy Dissipation;
- Network Synthesis;
- Electronics and Electrical Engineering