flagship
专利名称：Linear crystal oscillator with amplitude control and crosstalk cancellation
发明人：Gerald R. Newell,Michael W.
Nootbaar,Pradeep Bhardwajoneyear
申请号：US07/530640
英语发音软件申请日：19900530
founder公开号：US05047734A
breakdown什么意思公开日：e visions
四六级官网报名网站
19910910
专利内容由知识产权出版社提供
摘要：A ries-feedback crystal oscillator has a crystal element in ries with a buffer amplifier. The oscillator maintains a linear oscillation signal by using an amplitude control circuit to hold the oscillation signal to a certain level at which distortion, clipping, or saturation does not occur. A control signal indicative of the amplitude of the oscillation signal linearly multiplies the oscillation signal to control the amplitude of the oscillation signal. Shunt capacitance across the crystal is compensated for by connecting a compensating capacitor to the same input terminal of the buffer amplifier as is connected the crystal. A compensating signal, which is equal in amplitude but opposite in pha to the signal passing through the shunt capacitance of the crystal is fed to the input terminal of the buffer amplifier to cancel the effect of the shunt capacitance. A noninverted tracer signal is injected in the feedback loop and pass through the shunt capacitance. An inverted tracer signal pass through the compensating capacitor to cancel the noninverted tracer signal through the shunt capacitance and thereby compensate for the shunt capacitance of the crystal. Interfering crosstalk signals from one crystal oscillator circuit which are coupled into a cond crystal oscillator circuit are
reduced by feeding an oppositely phad interfering signal into the cond crystal oscillator circuit.
申请人：NEW SD, INC.
nephew代理机构：Flehr, Hohbach, Test, Albritton & Herbert
打印机培训
道真英语更多信息请下载全文后查看
