Title :
Negative differential resistance based voltage-controlled oscillator for VHF band
Author :
Ulansky, V.V. ; Ben Suleiman, Sali F.
Author_Institution :
Dept. of Electron., Nat. Aviation Univ., Kiev, Ukraine
Abstract :
This paper presents a novel sinusoidal negative differential resistance (NDR) voltage-controlled oscillator (VCO) for VHF band. The VCO circuit is based on a junction field effect transistor (JFET) in combination with a current mirror (CM). Mathematical model of the proposed VCO is described and the start-up conditions are determined. The designed VCO covers the frequency band between 139.8 and 256.2 MHz. It has a phase noise of -111.1 dBc/Hz at 10 kHz offset from carrier, consumes only 6.2mW, suppresses harmonics to better than -31dBc, and achieves a very good figure of merit (FOM) performance of -190 dBc/Hz. The implemented VHF VCO generates low-noise low-distortion signal confirming simulation results.
Keywords :
JFET circuits; VHF circuits; current mirrors; integrated circuit modelling; phase noise; voltage-controlled oscillators; JFET; VCO circuit; VHF band; bandwidth 139.8 MHz to 256.2 MHz; current mirror; junction field effect transistor; low-noise low-distortion signal; mathematical model; phase noise; power 6.2 mW; sinusoidal negative differential resistance; start-up conditions; voltage-controlled oscillator; MOSFET; Phase noise; Resistance; Threshold voltage; Voltage-controlled oscillators; negative differential resistance; phase noise; power consumption; voltage-controlled oscillator;
Conference_Titel :
Electronics and Nanotechnology (ELNANO), 2013 IEEE XXXIII International Scientific Conference
Conference_Location :
Kiev
Print_ISBN :
978-1-4673-4669-6
DOI :
10.1109/ELNANO.2013.6552016
