A New Type of ATCXO
Huang Xian-he · Piezoelectrics and Acoustooptics · 2006
This paper describes an indirect analog temperature-compensated crystal oscillator(TCXO) which could achieve a temperature compensation functioning much more accurately than those expected at present,and it is easy to integrate and downsize.It could resolve the mass problem of adjusting,further more,it is easy for automatic measure and compensation.This TCXO consists of two blocks.One is a temperature compensation circuit fitting in well with IC process,which outputs cubic functional variation of voltage with temperature(it consists of cubic and linear terms),while the other is voltage controlled crystal oscillator(VCXO),which has good linearity of frequency-control voltage characteristics(f-V_c characteristics).With one chip of LSI,it is easy to downsize these TCXOs and has an attainable precision of ±2.5×10~(-6) during a wide temperature of-30～+80 ℃.