A 7.9-GHz Transformer-Feedback Quadrature Oscillator With a Noise-Shifting Coupling Network
| Autor: | Howard C. Luong, Bingwei Jiang |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Coupling
Engineering Noise measurement Oscillator phase noise business.industry 020208 electrical & electronic engineering Quantum noise Electrical engineering dBc 020206 networking & telecommunications 02 engineering and technology Noise generator Phase noise 0202 electrical engineering electronic engineering information engineering Electronic engineering Effective input noise temperature Electrical and Electronic Engineering business |
| Zdroj: | IEEE Journal of Solid-State Circuits. 52:2636-2646 |
| ISSN: | 1558-173X 0018-9200 |
| DOI: | 10.1109/jssc.2017.2715855 |
| Popis: | A noise-shifting coupling network is proposed for nonlinear passively coupled quadrature voltage-controlled oscillators (QVCOs). Both detailed analysis and circuit implementation demonstrate that the noise contribution by the coupling network can be minimized by re-aligning the phases of the noise modulation function and the impulse sensitivity function with a reduced magnitude. In addition, the QVCO with the proposed coupling network also incorporates the transformer-feedback technique to improve its performance in terms of phase noise, quadrature phase error, and low supply voltage. Fabricated in a 65-nm CMOS process, the QVCO prototype operating at 7.9-GHz measures phase noise at 10-MHz offset frequency of −143 dBc/Hz and minimum quadrature phase error of 0.23° while consuming 27.2 mW with a 0.8-V supply voltage. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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