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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Watanabe, T. Terasawa, T. |
| Copyright Year | 2010 |
| Description | Author affiliation: Corporate R&D Dept. 3, DENSO CORPORATION, Kariya, Japan (Watanabe, T.; Terasawa, T.) |
| Abstract | An all-digital TAD-OFDM detection method for sensor interface with digital synchronous detection based on TAD (Time A/D converter)-type ADC is introduced. A TAD basic structure is a completely digital circuit including a ring-delay-line (RDL) with delay units (DUs) driven by an input voltage Vin and an RDL frequency counter, latch and encoder. Since the operating principle is to count the number of DUs through which the delay pulse passes within a sampling period Ts, this ADC (TAD) naturally performs as a Vin voltage-integration circuit for Ts. Hence, high frequency noises can be removed simultaneously with A/D conversion. First, as an example of a voltage-integration effect as a low-pass filter, magnet pick-up sensing was verified using a 22-bit TAD test chip fabricated using a 0.65-µm CMOS with 106 µV/LSB (100 kS/s). Next, the idea of digital synchronous detection with TAD (called TAD-DSD with the voltage-integration effect) is proposed. Finally, by using the TAD-DSD principle, TA-DOFDM detection is presented and experimentally confirmed, resulting in signal-detection of each wave-amplitude from a four-carrier-composite wave, which consists of frequencies, 1.6-, 3.2-, 6.4- and 12.8-MHz, respectively. |
| Starting Page | 786 |
| Ending Page | 789 |
| File Size | 1010906 |
| Page Count | 4 |
| File Format | |
| ISBN | 9781424481552 |
| e-ISBN | 9781424481576 |
| DOI | 10.1109/ICECS.2010.5724630 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2010-12-12 |
| Publisher Place | Greece |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | OFDM Vehicles Time frequency analysis |
| Content Type | Text |
| Resource Type | Article |
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