the digital separation circuit

Published:2011/7/20 21:58:00 Author:Borg | Keyword: digital separation circuit | From:SeekIC

The circuit is fixed with a photoelectric coupler, which can fully separate the electricity between 2 digital circuits. The low voltage input signal of +4V can also change the output state, and the circuit can afford the peak value of +100V without being broken down. Q1 and Q2 compose the current stabilizer, which limits the current at 7mA through the input terminal of the photoelectric separator. The Zener diode CR2 provides with the Vref which decides the current of R2.



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