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TTL NAND gate / voltages

 by Sandwich ¦  Sat Nov 25, 2017 11:19 am ¦  Forum: Forum ¦  Topic: TTL NAND gate / voltages ¦  Replies: 0 ¦  Views: 2418

Hi! I'm new to the forum and am a novice with electronics. I've gotten stuck... I'm trying to understand the behavior of transistors Q2 and Q4 in the classic TTL NAND gate. Any advice is appreciated! I understand that an NPN transistor in cut-off mode has low voltage at its base, and high voltage at...