Journal
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS I-REGULAR PAPERS
Volume 57, Issue 5, Pages 982-991Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TCSI.2010.2043987
Keywords
Analog-to-digital converter (ADC); continuous-time digital signal processing (CT DSP); level-crossing sampling; quantization
Categories
Funding
- National Science Foundation [CCF-07-01766]
Ask authors/readers for more resources
A variable-resolution (VR) quantizer with input-activity-dependent adjustable resolution is presented. Several potential schemes are discussed; the favored scheme achieves adjustable resolution by level skipping according to the speed of the input. The advantages of a VR analog-to-digital conversion (ADC) are presented with applications in continuous-time (CT) digital signal processing systems. It is shown that a decrease in resolution for fast inputs does not corrupt the in-band spectrum while leading to a reduction in the number of samples produced by a CT ADC. The result is a significant decrease in power dissipation but without in-band performance degradation. Analysis and extensive simulations are provided. Simulations using signals in the voice band show that a power reduction of over 80% is achievable with a VR quantization.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available