The traditional frequency measurement instrument volume is very big, consumes energy the quantity to be big, mainly depends on the manual operation, but the biggest shortcoming is unprogrammable, its measuring range transforms, the data survey, the sampling control and processing and so on cannot carry on the control through the program directive, is unable an achievement miniature intelligence subsystem carries on the connection with some large-scale automatic control or the test system. In view of these shortcomings, this frequency meter has made the radical innovation in the design, its merit is: Uses the core component is the advanced monolithic special-purpose frequency measurement component - - monolithic frequency meter, the integration rate is high, the volume is small, consumes the electricity province, function, has realized the frequency meter high integration and the microminiaturization; So long as the monolithic frequency meter adds on the crystal oscillator, the measuring range choice, the frequency demonstrated and so on the very few components then constitute DC (cocurrent) to the 10MHz miniature basic frequency measurement electric circuit; But the biggest merit was this frequency meter has realized monolithic frequency meter, frequency sampling electric circuit and the monolithic microcomputer three between hardware and the software connection completely, caused the frequency measurement measuring range the choice, the frequency data survey, the sampling as well as the code frontier transformation and the data dump possible monolithic microcomputer software programming automatically to carry on, thus has realized the frequency measurement and the sampling work intellectualizes completely, causes this system already to be possible to constitute a miniature intelligence to measure rate the instrument core electric circuit independently, also might take in the large-scale automatic control or a test system intelligent subsystem.
Keywords Integrates highly, monolithic integrated circuit, frequency meter, electric circuit
