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Digitally controlled source of calibration voltage
Záklasník, Miroslav ; Hanák, Pavel (referee) ; Vrba, Kamil (advisor)
This bachelor thesis is concerned with digitaly-controlled source of calibration voltage. This thesis projekts concrete analysis of 18-Bits indirect Digital – to – Analog converter for Digital – controlled calibration standart. Range of output voltage is 0 to 10 V. In this case is used DC accurate filter of ninth rate. Output DC amplifier is suggested as switchable, with range 0,1V , 1V and 10V. This equipment is worked as pluggable module to the computer. There is decribed low-pass filter, his characteristics, approximation of transmission function and various type like (Butterworth, Bessel a Čebyšev). There are described indirect D/A converters too and their capability, principles. There are performed principles of referential source , that use width of transition range in semiconductors and described project of ninth grade activ filter. I projected circuit of pulse width modulation, and posibility of using power editor MOSFET IR 2110
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