有一電路:http://www.wretch.cc/album/show.php?i=msuPTT&b=1&f=1364052334&p=1
For the circuit, let the voltage at input A,B,C,D are 0V and 5V.
Assume |VBE|=0.7V and β=50
(a)For all inputs low at 0V,what is the voltage at Y?
(b)If A and C are raised to 5v,what is the voltage at Y?
(c)Express Y as a logic function of A,B,C and D.
請問高手如何解這一題呢?^^
感謝
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