【摘要】 提出了用稳定度低的连续调频振荡器和稳定度高的固定频率振荡器通过锁相式数字频率合成器适当结合,以获得高稳定度连续可调频率源的新方案。其方法是将稳定度低的连续调频振荡器的频率搬移到合成频率的尾数部分,使得整个变频范围的所有频率都能连续调得,而合成频率的稳定度又能接近固定频率振荡器的稳定度。由此构成的350HZ～650HZ 范围内连续可调、稳定度为10^-5～10^-6的三相变频电源已交付运行和移交生产。更多还原

【Abstract】 A new design approach of an adjustable oscillator of high stability is presented.The method is based on using a phaselocked digital frequency synthesizer,whichcombines an adjustable oscillator of low stability to an unchangeable oscillator ofhigh stability.The frequency of the adjustable oscillator is shifted to the lowerpart of the synthesized frequency,so that all frequency within the whole band canbe obtained and the stability of the synthesized frequency could be close to thatof the unchangeable oscillator.A three phase frequency-changeable power supplyhas been develoqed and produced.The frequency of the power supply can beadjusted continuously within the range of 350 Hz to 650Hz and its frequency sta-bility is in the order of 10^-5—10^-6.更多还原