A Crystal-Less Clock Generator for Low-Power and Low-Cost Sensor Transceiver With 12.9 MHz-to-3.3 GHz Range, 16.67 ppm/°C Inaccuracy From −25°C to 85°C, and 0.25 μs Settle-Time
This paper proposes the design and implementation of a crystal-less clock generator for low-power, cost-effective sensor transceiver systems. The proposed system integrates a p-poly resistor-based relaxation RC oscillator (RCO), a Fractional-N PLL (W-FPLL) with a wide frequency range and fast settli...
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IEEE
2025-01-01
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| Online Access: | https://ieeexplore.ieee.org/document/11029021/ |
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| author | Sangdon Jung Minsu Park Jung-Hoon Chun |
| author_facet | Sangdon Jung Minsu Park Jung-Hoon Chun |
| author_sort | Sangdon Jung |
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| description | This paper proposes the design and implementation of a crystal-less clock generator for low-power, cost-effective sensor transceiver systems. The proposed system integrates a p-poly resistor-based relaxation RC oscillator (RCO), a Fractional-N PLL (W-FPLL) with a wide frequency range and fast settling time, and an on-chip temperature sensor unit (TSU) for temperature compensation. To minimize frequency variation in the RCO, a low target frequency is set, and the frequency range is expanded using the PLL. The W-FPLL supports a wide frequency range from 12.9 MHz to 3.3 GHz. Additionally, temperature-induced frequency variations are compensated by applying the TSU’s digital data to the Delta-Sigma Modulator (DSM), while Piecewise Linear Calibration enhances compensation accuracy. The proposed clock generator achieves a frequency stability of 16.67 ppm/°C under temperature variations. The total system die area is 0.102 mm2. At 3.3 GHz, the system consumes 6.35 mW of total power. |
| format | Article |
| id | doaj-art-b3df427dc7f34b54aaaa80fd94674404 |
| institution | Kabale University |
| issn | 2169-3536 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | IEEE |
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| series | IEEE Access |
| spelling | doaj-art-b3df427dc7f34b54aaaa80fd946744042025-08-20T03:29:35ZengIEEEIEEE Access2169-35362025-01-011310599510600210.1109/ACCESS.2025.357824911029021A Crystal-Less Clock Generator for Low-Power and Low-Cost Sensor Transceiver With 12.9 MHz-to-3.3 GHz Range, 16.67 ppm/°C Inaccuracy From −25°C to 85°C, and 0.25 μs Settle-TimeSangdon Jung0https://orcid.org/0009-0000-2552-5549Minsu Park1Jung-Hoon Chun2https://orcid.org/0000-0002-2668-6739Department of Semiconductor and Display Engineering, Sungkyunkwan University, Suwon, South KoreaDepartment of Semiconductor and Display Engineering, Sungkyunkwan University, Suwon, South KoreaDepartment of Semiconductor and Display Engineering, Sungkyunkwan University, Suwon, South KoreaThis paper proposes the design and implementation of a crystal-less clock generator for low-power, cost-effective sensor transceiver systems. The proposed system integrates a p-poly resistor-based relaxation RC oscillator (RCO), a Fractional-N PLL (W-FPLL) with a wide frequency range and fast settling time, and an on-chip temperature sensor unit (TSU) for temperature compensation. To minimize frequency variation in the RCO, a low target frequency is set, and the frequency range is expanded using the PLL. The W-FPLL supports a wide frequency range from 12.9 MHz to 3.3 GHz. Additionally, temperature-induced frequency variations are compensated by applying the TSU’s digital data to the Delta-Sigma Modulator (DSM), while Piecewise Linear Calibration enhances compensation accuracy. The proposed clock generator achieves a frequency stability of 16.67 ppm/°C under temperature variations. The total system die area is 0.102 mm2. At 3.3 GHz, the system consumes 6.35 mW of total power.https://ieeexplore.ieee.org/document/11029021/Crystal-less clock generatoron-chip RC oscillatorfractional-N PLLtemperature compensationsensor transceiver |
| spellingShingle | Sangdon Jung Minsu Park Jung-Hoon Chun A Crystal-Less Clock Generator for Low-Power and Low-Cost Sensor Transceiver With 12.9 MHz-to-3.3 GHz Range, 16.67 ppm/°C Inaccuracy From −25°C to 85°C, and 0.25 μs Settle-Time IEEE Access Crystal-less clock generator on-chip RC oscillator fractional-N PLL temperature compensation sensor transceiver |
| title | A Crystal-Less Clock Generator for Low-Power and Low-Cost Sensor Transceiver With 12.9 MHz-to-3.3 GHz Range, 16.67 ppm/°C Inaccuracy From −25°C to 85°C, and 0.25 μs Settle-Time |
| title_full | A Crystal-Less Clock Generator for Low-Power and Low-Cost Sensor Transceiver With 12.9 MHz-to-3.3 GHz Range, 16.67 ppm/°C Inaccuracy From −25°C to 85°C, and 0.25 μs Settle-Time |
| title_fullStr | A Crystal-Less Clock Generator for Low-Power and Low-Cost Sensor Transceiver With 12.9 MHz-to-3.3 GHz Range, 16.67 ppm/°C Inaccuracy From −25°C to 85°C, and 0.25 μs Settle-Time |
| title_full_unstemmed | A Crystal-Less Clock Generator for Low-Power and Low-Cost Sensor Transceiver With 12.9 MHz-to-3.3 GHz Range, 16.67 ppm/°C Inaccuracy From −25°C to 85°C, and 0.25 μs Settle-Time |
| title_short | A Crystal-Less Clock Generator for Low-Power and Low-Cost Sensor Transceiver With 12.9 MHz-to-3.3 GHz Range, 16.67 ppm/°C Inaccuracy From −25°C to 85°C, and 0.25 μs Settle-Time |
| title_sort | crystal less clock generator for low power and low cost sensor transceiver with 12 9 mhz to 3 3 ghz range 16 67 ppm x00b0 c inaccuracy from x2212 25 x00b0 c to 85 x00b0 c and 0 25 x03bc s settle time |
| topic | Crystal-less clock generator on-chip RC oscillator fractional-N PLL temperature compensation sensor transceiver |
| url | https://ieeexplore.ieee.org/document/11029021/ |
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