Oscillator, PLL circuit, communication equipment, and oscillating method

摘要: The present invention provides an oscillator or PLL circuit which can balance the characteristics of a without being affected by noise from signal line supply line. comprising resonance has first series connected having coils and power terminal, second capacitors varactor directional characteristics, third characteristics. first, second, circuits are in parallel. varactors so as to have opposite directionalities with respect connection side circuit. capacities varied external control. determine oscillation frequency.