The frequency of the pulse is the same as that of the crystal oscillator . the pulses sampled the output of the vco and generate the error signal . the error signal is amplified , 誤差電壓經(jīng)放大后送入環(huán)路濾波器進行濾波和再放大,然后去改變變?nèi)莨芷秒妷?控制振蕩器輸出頻率,達到穩(wěn)頻的目的。
The deposition rate of aerosol particles in capillary tube was measured with submicrometer monodisperse polystyrene spheres solid aerosol particles and pulse sample inserting technique ; and studies were made on the relationship between the flow velocity , the tube diameter , the tube length and aerosol particles size 摘要采用亞微米單分散聚苯乙烯球形硬氣溶膠粒子和脈沖進樣技術(shù),測定了氣溶膠粒子在管道中的沈積率,研究了沈積率與流體速度、管道長度、管道直徑和氣溶膠粒子大小之間的關(guān)系。