Isolated current / frequency conversion circuit

Published:2011/7/5 20:36:00 Author:Lucas | Keyword: Isolated , current conversion , frequency conversion | From:SeekIC

The circuit uses the high noise isolation circuit to play a role of isolation, and it will convert current into 0-IOkHz frequency, which is output by the optical coupler TLP521. The circuit iscomposed of the voltage ratio and current / voltage conversion parts. LM331 voltage frequency could convert the voltage into frequency; current / voltage conversion uses the resistor Rl to generate the voltage at both ends (1-5V), and it is converted into 0 -10V voltage by Al (gain is set to 2.5 times).



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