Timeline for Understanding AND logic gate
Current License: CC BY-SA 3.0
6 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| May 28, 2014 at 14:40 | comment | added | Spehro 'speff' Pefhany | This is not a very good AND gate. If SW2 is closed, Vout will be about 4.9V whether SW1 is open or closed. | |
| Jun 19, 2013 at 14:28 | vote | accept | David Johns | ||
| Jun 19, 2013 at 13:12 | comment | added | Nick Williams | You are correct that most of the current will travel in the "square", but a small amount of current will travel through the switches, into the Base of the transistors. This is what will activate the transistors to allow current to travel from Emitter to Collector. The current through the switches into the Base will rejoin with the rest of the current and output from the Collector also. | |
| Jun 19, 2013 at 12:53 | comment | added | David Johns | Thank you for your answer and schematic. :) But, one more question: when two switches are closed current may flow through a part of wire containing power source(battery?), Q1, Q2, and R1(forming square). But what about the part containing R2, R4, SW1 and SW2? Does current flow through that part too? If so, what's the direction of the current? I can't imagine a current that doesn't form a circular form. :-p I simulated the circuit via the link in your answer, but I didn't answer myself the question. It gave me some values for I and V at a point of the circuit, but I couldn't interpret it well. | |
| Jun 18, 2013 at 17:48 | history | edited | Nick Williams | CC BY-SA 3.0 |
added 338 characters in body
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| Jun 18, 2013 at 17:36 | history | answered | Nick Williams | CC BY-SA 3.0 |