Device for correcting YIG tuned filter scanning tuning nonlinearity in real time
A tuning filter, nonlinear technology, applied in electrical components, impedance networks, etc., can solve the complex and difficult problems of swept tuning nonlinear compensation
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[0016] The idea of YTF scanning tuning nonlinear correction in the present invention is to adjust the slope of the preset DAC in real time to achieve the effect of linear fitting according to the YTF scanning and tuning nonlinear curve; and the adjustment of the preset DAC slope is to add another path of scanning nonlinear correction circuit to achieve. Different from the commonly used scan tuning compensation method that adds the same offset value in a large frequency range, the present invention can make each frequency point have a separate scan tuning compensation value, the compensation is more accurate and effective, and it is more conducive to the rapid scanning of YTF tuning.
[0017] Such as image 3 , The real-time correction device includes a YTF real-time calibration source part (comprising a comb generator 1 and a switch 2) and a YTF tuning drive and compensation part (comprising a counter 3, a data accumulator 4, an address accumulator 5, a data RAM6, a DAC 1 ...
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