15 April 2008 1/f noise and phase noise in RTD oscillators
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Abstract
Here we apply the quantum theory of 1/f noise to evaluate the 1/f noise of double-barrier RTDs in general, and to the phase noise of oscillators based on them. If the energy of the tunneling electrons is close to the first energy level in the well, resonance occurs, and a peak I of the current through the diode occurs at the voltage v. If the applied voltage increases further, only a negligibly small non-resonant current trickle i remains at the valley voltage V>v. Scattering processes that reduce the energy of the carriers from the resonant energy eV will always be present, generating a finite current minimum i at v. Their quantum 1/f rate fluctuations cause the 1/f current fluctuations in i. The results are compared with experimental data on RTD oscillators. The resulting phase noise of oscillators built on this basis is calculated with the quantum 1/f theory.
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Peter H. Handel, "1/f noise and phase noise in RTD oscillators", Proc. SPIE 6949, Terahertz for Military and Security Applications VI, 69490I (15 April 2008); doi: 10.1117/12.778129; https://doi.org/10.1117/12.778129
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