Ultra-Wideband, Low-Power, Inductorless, 3.1–4.8 GHz, CMOS VCO

Abstract

A low-power, inductorless, UWB CMOS voltage controlled oscillator is designed in 0.18 µm CMOS technology targeting to a UWBFM transmitter application. The VCO is a Double-Cross-Coupled Multivibrator and generates output frequencies ranging from 1.55 GHz to 2.4 GHz. A low-power frequency doubler based on a Gilbert cell, which operates in weak inversion, doubles the VCO tuning range from 3.1 GHz to 4.8 GHz. The proportionality between the oscillation frequency and the bias current is avoided in this case for the entire achieved tuning range resulting in a low-power design. The selected architecture provides high suppression, over 45 dB, for the 1 st and 3 rd harmonics, while enabling high-frequency operation and conversion gain due to the unbalanced structure and the single-ended output. The proposed VCO draws 4 mA from a 1.8 V supply, it has a phase noise of −76.7 dBc/Hz at 1 MHz offset from the center frequency, while it exhibits a very high ratio of tuning range (43%) over power consumption equal to 7.76 dB.

Ευφυές Υπολογιστικό Σύστημα Για Την Ανίχνευση Ελαττωμάτων Και Ανωμαλιών Στην Ηλεκτρολογία

“…1-Sensitivity defines the total number of FP values divided by the total number of TN and FP values(5). F1-score is the harmonic mean of Precision and Recall and is defined from the multiplication of Precision by Recall and then by the number two divided by the product of Precision and Recall(6). Additionally, based on these metrics we produced the receiver operating characteristic (ROC) and Precision-Recall curves.…”