A 0.5-V, 440-µW Frequency Synthesizer for Implantable Medical Devices
| Autor: | Wu-Hsin Chen, Byunghoo Jung, Wing-Fai Loke |
|---|---|
| Rok vydání: | 2012 |
| Předmět: |
Frequency synthesizer
Engineering business.industry Electrical engineering Hardware_PERFORMANCEANDRELIABILITY Phase-locked loop Voltage-controlled oscillator CMOS Direct digital synthesizer Hardware_GENERAL Phase noise Hardware_INTEGRATEDCIRCUITS Electronic engineering Charge pump Frequency offset Electrical and Electronic Engineering business |
| Zdroj: | IEEE Journal of Solid-State Circuits. 47:1896-1907 |
| ISSN: | 1558-173X 0018-9200 |
| Popis: | An ultra-low-power, low-voltage frequency synthesizer designed for implantable medical devices is presented. Several design techniques are adopted to address the issues in ultra-low voltage and current design. The charge pump (CP) in the synthesizer utilizes dynamic threshold-voltage and switch-coupled techniques to provide a high driving current with a low standby current. The synthesizer adopts a ring-based voltage controlled oscillator (VCO) that utilizes a dual resistor-varactor tuning technique to compensate for process-voltage-temperature (PVT) variations and the exponential voltage-to-current curve. Implemented in a 0.13-μm CMOS technology, the 0.5-V medical-band frequency synthesizer consumes 440 μW while exhibiting a phase noise of 91.5 dBc/Hz at 1-MHz frequency offset. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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