Title: High precision temperature compensation crystal oscillator
Application Number: 200610043369 Application Date: 2006.03.28
Publication Number: 1829076 Publication Date: 2006.09.06
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: H03B5/32,H03B5/04
Applicant(s) Name: Qingdao SIVICmicro Co., Ltd. Address: 266071
Inventor(s) Name:
Attorney & Agent: gong aibin
Abstract:
     The present invention refers to high precision thermal compensation crystal oscillator, belonging to electronic device. It contains crystal oscillator, inverter, pressing control capacitor and temperature compensation circuit. Said includes input SD and SCL interface, programmable memory five digital analog converter respectively connected with five output ports of said memory, reference voltage source, overall coefficient multinomial penalty function generator and temperature sensor. Output port of Functional generator is connected with inverter input end, said programmable memory output port respectively connected with two capacitances switch control end. Two capacitance switches are connected between crystal oscillator two ends and ground, pressing control capacitor connected between inverter input end and ground, in -40- 85 degree centigrade range frequency accuracy reaching -1X10-6. It has simple structure, high reliability, range of frequencies reaching 5-30 megahertz, can be widely used in different kinds of circuit in particular digital circuit.
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