| Presentation | 2009-12-14 A nanowatt DA converter for subthreshold CMOS LSIs Kazuki YAMAMOTO, Ken UENO, Tetsuya ASAI, Yoshihito AMEMIYA, |
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| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | An ultra-low power digital-to-analog (DA) converter based on the technique of pulse-width-modulated DA conversion was proposed. The circuit consists of a ring oscillator, a digital divider, a low-pass filter, and a current switch, which are operated in the subthreshold region of MOSFETs. The digital divider combined with the ring oscillator produces a voltage pulse whose width is proportional to the digital input. The current switch accepts the voltage pulse and sends a current pulse to the low-pass filter. The filter smooths the pulse and produces an output voltage that is proportional to the mean value of the pulse current. As a result, the circuit performs digital-to-analog conversion. The SPICE simulation with 0.35-um CMOS parameters showed that a power dissipation of our circuit was 540nW for 8-bit DA conversion and al.5-V power supply. Our circuit would be suitable for use in subthreshold-operated, smart sensor LSIs. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | CMOS / DA converter / Time domain / Subthreshold region / Weak inversion / Ultra-low power |
| Paper # | ICD2009-88 |
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| Conference Information | |
| Committee | ICD |
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| Conference Date | 2009/12/7(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Paper Information | |
| Registration To | Integrated Circuits and Devices (ICD) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | A nanowatt DA converter for subthreshold CMOS LSIs |
| Sub Title (in English) | |
| Keyword(1) | CMOS |
| Keyword(2) | DA converter |
| Keyword(3) | Time domain |
| Keyword(4) | Subthreshold region |
| Keyword(5) | Weak inversion |
| Keyword(6) | Ultra-low power |
| 1st Author's Name | Kazuki YAMAMOTO |
| 1st Author's Affiliation | Graduate School of Information Science and Technology, Hokkaido University() |
| 2nd Author's Name | Ken UENO |
| 2nd Author's Affiliation | Graduate School of Information Science and Technology, Hokkaido University |
| 3rd Author's Name | Tetsuya ASAI |
| 3rd Author's Affiliation | Graduate School of Information Science and Technology, Hokkaido University |
| 4th Author's Name | Yoshihito AMEMIYA |
| 4th Author's Affiliation | Graduate School of Information Science and Technology, Hokkaido University |
| Date | 2009-12-14 |
| Paper # | ICD2009-88 |
| Volume (vol) | vol.109 |
| Number (no) | 336 |
| Page | pp.pp.- |
| #Pages | 6 |
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