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| Presentation | 2012-01-23 14:50 Switched-Capacitor Circuit Implementation of Golden-Ratio-Encoder -- Effects of the offset voltage and finite gain of an op-amp -- Hirotaka Fukushima, Yoshihiko Horio (Tokyo Denki Univ.), Kazuyuki Aihara (Univ. of Tokyo)  NLP2011-128 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (in English) | The $\beta$-encoder is an A/D converter with an exponential bit-rate accuracy with respect to the bit length $L$, and robustness for circuit parameter deviations. Recently, a golden-ratio-encoder (GRE) was proposed. GRE is a data conversion method with a radix of the golden-ratio $\phi$ based on the $\beta$-encoder. GRE uses two previous (time-delayed) internal states to encode the input signal. However, if the delayed signals were fluctuated, the decoding performance deteriorates if we blindly use $\phi$ as a radix. Although an estimation technique for an effective radix $\hat{\phi}$ through a characteristic equation was given, it is not suitable for circuit implementations. In this paper, we discuss practical issues on integrated circuit implementations of GRE. First, we show an example of switched-capacitor circuit implementation of GRE. Then, we evaluate the effects of offset voltage and finite gain of an op-amp. Second, we propose a novel method to estimate the effective value of the radix of conversion $\hat{\phi}$ from the gain of op-amp in the circuit. |
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| Keyword | (in Japanese) | (See Japanese page) |
| (in English) | golden-ratio-encoder (GRE) / $\beta$-encoder / A/D converter / / / / / | |
| Reference Info. | IEICE Tech. Rep., vol. 111, no. 395, NLP2011-128, pp. 23-28, Jan. 2012. | |
| Paper # | NLP2011-128 | |
| Date of Issue | 2012-01-16 (NLP) | |
| 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 | NLP2011-128 |
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| Conference Information | |
| Committee | NLP |
| Conference Date | 2012-01-23 - 2012-01-24 |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Aizu-keiko-do Hall |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | General |
| Paper Information | |
| Registration To | NLP |
| Conference Code | 2012-01-NLP |
| Language | Japanese |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Switched-Capacitor Circuit Implementation of Golden-Ratio-Encoder |
| Sub Title (in English) | Effects of the offset voltage and finite gain of an op-amp |
| Keyword(1) | golden-ratio-encoder (GRE) |
| Keyword(2) | $\beta$-encoder |
| Keyword(3) | A/D converter |
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| 1st Author's Name | Hirotaka Fukushima |
| 1st Author's Affiliation | Tokyo Denki University (Tokyo Denki Univ.) |
| 2nd Author's Name | Yoshihiko Horio |
| 2nd Author's Affiliation | Tokyo Denki University (Tokyo Denki Univ.) |
| 3rd Author's Name | Kazuyuki Aihara |
| 3rd Author's Affiliation | The University of Tokyo (Univ. of Tokyo) |
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| Speaker | Author-1 |
| Date Time | 2012-01-23 14:50:00 |
| Presentation Time | 25 minutes |
| Registration for | NLP |
| Paper # | NLP2011-128 |
| Volume (vol) | vol.111 |
| Number (no) | no.395 |
| Page | pp.23-28 |
| #Pages | 6 |
| Date of Issue | 2012-01-16 (NLP) |
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