A Novel Coherent Digital Sweep Oscillator with Extremely Low Sweep Rates and Harmonic Distortion
A novel technique to efficiently increase the resolution of coherent digital sweep oscillators based on look-up-table (LUT) methods is proposed. The increase in resolution measured in terms of sweep rates is achieved while maintaining very low levels of spurious harmonic distortion. The proposed tec...
| Main Author: | |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Hindawi Limited
2001-01-01
|
| Series: | Active and Passive Electronic Components |
| Online Access: | http://dx.doi.org/10.1155/APEC.23.197 |
| Summary: | A novel technique to efficiently increase the resolution of coherent digital sweep
oscillators based on look-up-table (LUT) methods is proposed. The increase in
resolution measured in terms of sweep rates is achieved while maintaining very low
levels of spurious harmonic distortion. The proposed technique increases the LUT length
to a level at which the spurious harmonic distortion is negligible. The proposed
technique is based on partitioning the address register into three sets and dividing the
available LUT length into five smaller tables addressed according to the content of the
three address register sets. The proposed technique is simulated and its performance is
compared with that of the known sweep oscillators. The simulation results show that the
proposed technique is superior to all sweep oscillators reported in the literature. |
|---|---|
| ISSN: | 0882-7516 1563-5031 |