A 2.5 ppm/°C 1.05 MHz Relaxation Oscillator with Dynamic Frequency-Error Compensation and 8 µs Start-up Time
| Autor: | Xing Chen, Ningxi Liu, Benton H. Calhoun, David D. Wentzloff, Sumanth Kamineni, Rishika Agarwala, Anjana Dissanayake, Daniel S. Truesdell |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
Comparator business.industry 020208 electrical & electronic engineering Relaxation oscillator 02 engineering and technology Compensation (engineering) law.invention law 0202 electrical engineering electronic engineering information engineering Optoelectronics Resistor business Temperature coefficient Voltage reference Voltage Jitter |
| Zdroj: | ESSCIRC |
| Popis: | This work presents a 1.05 MHz on-chip RC relaxation oscillator (ROSC) design with a temperature coefficient (TC) of 2.5 ppm/°C and an absolute variation of 100 ppm over the body-compatible range of 0 to 40°C (the TC increases to 4.3 ppm/°C over the range from −15 to 55°C). The high temperature stability is achieved using a PTAT current reference and a TC-tunable resistor bank for first-order frequency error compensation along with a digital frequency compensation (DFC) block using a single-bit temperature sensor for second-order compensation. A measured RMS period jitter of 160 ps is achieved with a high-speed comparator. The active power consumption of the ROSC is 69 µW with a 1 V supply, and the leakage power consumption is 110 nW while power-gated. The ROSC achieves a fast startup time of 8 µs by employing a voltage buffer to quickly stabilize the voltage reference. |
| Databáze: | OpenAIRE |
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