The invention relates to a high-accuracy temperature compensation
crystal oscillator system and an operational method of the high-accuracy temperature compensation
crystal oscillator system. The high-accuracy temperature compensation
crystal oscillator system comprises a computer, a power supply, an
incubator, a
frequency meter, a frequency-scaling and data-transporting and displaying unit, a
data input and output (DIO) card used for driving the testing controlling board arranged on the computer mainboard in an inserting mode, and a
general purpose interface
bus (GPIB) card used for driving the
incubator, the
frequency meter, and the power supply.
Software based on event-driving controls the power supply, the
incubator and the
frequency meter through the DIO card and the GPIB card, reads multiple sets of data of each set temperature point and stores the data inside a
computer database. The multiple sets of data are synthesized into a plurality of five-order functions in a set temperature range, and a best curve is calculated by the
software. Each coefficient of the best curve is extracted, and is converted into numbers inside the an
internal memory of a
crystal oscillator chip through an analog to digital (A / D) converter, and therefore the number of capacitors controlled by the memory is changed, and the purpose of high-accuracy temperature compensation of the
crystal oscillator is achieved. The high-accuracy temperature compensation
crystal oscillator system and the operational method of the high-accuracy temperature compensation crystal oscillator
system can be produced in scale and are high in working efficiency.