论文部分内容阅读
引言在国内外用于各种遥测的发射机,都采用大频偏(△F=(10~(-4)～10~(-3))f_0)的调频体制。对于这种体制,利用泛音晶体直接调频显然是不能满足要求的。因此,多数采用混频方案(即用一个高稳定度的晶体振荡信号与一个LC调频振荡信号混频,取其上边频信号,最后放大到需要的功率),少数的采用表面波振荡调频或LC振荡调频方案。自1977年离子刻蚀的高频基波晶体问世之后,一种大频偏的晶体调频振荡电路引起了人们极大的兴趣和关注。近几年来,山东大学和电子工业部第十研究所的离子刻蚀高频基波晶体的研制成功,为
Introduction At home and abroad for a variety of telemetry transmitter, using large frequency deviation (△ F = (10 ~ (-4) ~ 10 ~ (-3)) f_0) frequency modulation system. For such a system, the use of overtone crystal direct FM obviously can not meet the requirements. Therefore, the majority of the mixing scheme (that is, using a high stability of the crystal oscillation signal and a LC FM oscillation signal mixing, whichever is the upper side frequency signal, and finally amplified to the required power), a few using surface wave oscillation FM or LC Oscillation FM program. Since the advent of high frequency fundamental wave crystals of ion etching in 1977, a large frequency offset crystal oscillator circuit has aroused great interest and attention. In recent years, Shandong University and the Tenth Institute of Electronics Industry, ion etching high frequency fundamental wave crystal was successfully developed as