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| Presentation | 2010-11-26 11:00 Amplitude Adjustment Spur Suppression Technique of a Digital Frequency Synthesizer Using a PH-DAC Kenichi Tajima, Ryoji Hayashi, Morishige Hieda (Mitsubishi Electric corp.)  MW2010-117 Link to ES Tech. Rep. Archives: MW2010-117 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (in English) | This paper presents a novel spur suppression technique for a direct digital synthesizer (DDS) with a phase holding digital-to-analog converter (PH-DAC). A PH-DAC, which uses a reverse-sign step-function as a sampling pulse waveform, enhances the first image of aliasing, which is of higher frequency than the fundamental. Here the first image is treated as a desired signal, while the fundamental and the second image are spurs. This paper describes a novel spur suppression technique by reverse-phase cancellation. To obtain equal signal amplitudes at spur frequencies, the proposed technique adjusts amplitude coefficients of a signal according to the output frequency. Evaluated spur levels of the proposed DDS in the L-band are from -38.6 to -24 dBc, and are improved by 13.5 dB or more. | |
| Keyword | (in Japanese) | (See Japanese page) |
| (in English) | Direct digital synthesizer / phase holding / digital analog converter / / / / / | |
| Reference Info. | IEICE Tech. Rep., vol. 110, no. 307, MW2010-117, pp. 71-74, Nov. 2010. | |
| Paper # | MW2010-117 | |
| Date of Issue | 2010-11-18 (MW) | |
| ISSN | Print edition: ISSN 0913-5685 Online edition: ISSN 2432-6380 | |
| Copyright and reproduction |
All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034) | |
| Download PDF | MW2010-117 Link to ES Tech. Rep. Archives: MW2010-117 |
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| Conference Information | |
| Committee | MW |
| Conference Date | 2010-11-25 - 2010-11-26 |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Tiruru |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Paper Information | |
| Registration To | MW |
| Conference Code | 2010-11-MW |
| Language | Japanese |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Amplitude Adjustment Spur Suppression Technique of a Digital Frequency Synthesizer Using a PH-DAC |
| Sub Title (in English) | |
| Keyword(1) | Direct digital synthesizer |
| Keyword(2) | phase holding |
| Keyword(3) | digital analog converter |
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| 1st Author's Name | Kenichi Tajima |
| 1st Author's Affiliation | Mitsubishi Electric corporation (Mitsubishi Electric corp.) |
| 2nd Author's Name | Ryoji Hayashi |
| 2nd Author's Affiliation | Mitsubishi Electric corporation (Mitsubishi Electric corp.) |
| 3rd Author's Name | Morishige Hieda |
| 3rd Author's Affiliation | Mitsubishi Electric corporation (Mitsubishi Electric corp.) |
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| Speaker | Author-1 |
| Date Time | 2010-11-26 11:00:00 |
| Presentation Time | 25 minutes |
| Registration for | MW |
| Paper # | MW2010-117 |
| Volume (vol) | vol.110 |
| Number (no) | no.307 |
| Page | pp.71-74 |
| #Pages | 4 |
| Date of Issue | 2010-11-18 (MW) |
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