Title :
Broadband VCO phase noise sensitivity to oscillator circuit parameters
Author :
Nagy, Robert ; Majurec, Ninoslav
Author_Institution :
Fac. of Electr. Eng. & Comput., Zagreb Univ., Croatia
Abstract :
The measurement and simulation results for the described VCO topology showed strong correlation between local frequency selective increase of the negative input resistance and the phase noise increasing in the same frequency band. For rigorous oscillator analysis, the impact of the varactor nonlinearities with nonlinear transistor input impedance must be taken into consideration. Active elements should be classified regarding the 1/f noise, because the 1/f noise could be converted to the oscillator phase noise
Keywords :
1/f noise; UHF oscillators; circuit noise; negative resistance circuits; phase noise; sensitivity analysis; varactors; voltage-controlled oscillators; 1.2 to 2.2 GHz; 1/f noise; VCO phase noise sensitivity; broadband VCO; negative input resistance; oscillator analysis; oscillator circuit parameters; Active noise reduction; Circuit simulation; Circuit topology; Electrical resistance measurement; Frequency measurement; Noise measurement; Phase measurement; Phase noise; Varactors; Voltage-controlled oscillators;
Conference_Titel :
Instrumentation and Measurement Technology Conference, 2001. IMTC 2001. Proceedings of the 18th IEEE
Conference_Location :
Budapest
Print_ISBN :
0-7803-6646-8
DOI :
10.1109/IMTC.2001.928238
