Gain control method of the profit variable analog digital transmitter and the profit variable analog digital transmitter, and the system which includes the profit variable analog digital transmitter

摘要

Current value it was connected to electric current and the operational amplifier which are output from the adjustment possible current source circuit, high tension side of reference voltage and it generates the voltage value of voltage side low impedance value on the basis of with the adjustment possible impedance element, that high tension side of the reference voltage value where it does analog digital conversion on the basis of decides main point no of gain control of analog digital conversion with the conversion result, output current of the above-mentioned current source circuit or/and adjusting the impedance value of the above-mentioned impedance element on the basis of the said decision, it describes occurs and it is low voltage of voltage sideValue is adjusted. High tension side of the said reference voltage value and with the adjustment of voltage value of voltage side low, it made the constitution which makes the profit of analog digital conversion variable. To pull out the efficiency of the analog digital transmitter, doing analog signal processing in high efficiency is possible to the maximum, the profit variable analog digital transmitter can be offered.