压电与声光
壓電與聲光
압전여성광
PIEZOELECTRICS & ACOUSTOOPTICS
2009年
4期
493-495
,共3页
分立式%基频%带通%桥型电路
分立式%基頻%帶通%橋型電路
분입식%기빈%대통%교형전로
discrete%fundamental frequency%band-pass%bridge model circuit
采用了4只AT切、基频为43.5 MHz、UM-1(5)微型金属壳封装的石英晶体和两节差接桥型电路设计,成功研制出一种外形尺寸仅为25 mm×11 mm×28 mm(L×W×H)的小体积分立式带通石英晶体滤波器.在带宽≥±6. 5 kHz的范围内通带波动≤1 dB,在阻带宽度≤±25 kHz范围内衰减≥60 dB;较好地实现了器件所要求的各项技术参数.高基频晶体振子的设计及小尺寸器件的制作体现了该项目的两大特点.
採用瞭4隻AT切、基頻為43.5 MHz、UM-1(5)微型金屬殼封裝的石英晶體和兩節差接橋型電路設計,成功研製齣一種外形呎吋僅為25 mm×11 mm×28 mm(L×W×H)的小體積分立式帶通石英晶體濾波器.在帶寬≥±6. 5 kHz的範圍內通帶波動≤1 dB,在阻帶寬度≤±25 kHz範圍內衰減≥60 dB;較好地實現瞭器件所要求的各項技術參數.高基頻晶體振子的設計及小呎吋器件的製作體現瞭該項目的兩大特點.
채용료4지AT절、기빈위43.5 MHz、UM-1(5)미형금속각봉장적석영정체화량절차접교형전로설계,성공연제출일충외형척촌부위25 mm×11 mm×28 mm(L×W×H)적소체적분입식대통석영정체려파기.재대관≥±6. 5 kHz적범위내통대파동≤1 dB,재조대관도≤±25 kHz범위내쇠감≥60 dB;교호지실현료기건소요구적각항기술삼수.고기빈정체진자적설계급소척촌기건적제작체현료해항목적량대특점.
A new type of disctete band-pass piezoelectric quartz crystal filter with small size of 25 mm×11 mm×28 mm(L×W×H) has been developed. The device is designed by composing of four pieces of AT-cut quartz crystals with fundamental frequency of 43.5 MHz and metal micro-package of UM-1(5) and two section differential bridge-model circuits.The pass-band ripple is equal to or less than 1 dB in the bandwidth of equal to or greater than ±6.5 kHz and the attenuation is equal to or greater than 60 dB in the stopband width of equal to or less than ±25 kHz. All the thchnical parameters have been achieved according to the requirements to the device. This work is characterized by the design of high fundamental frquency crystal resonator and the fabrication of small device.
