Talk:XOR gate

This page should show a transistor implementation of an xor gate. Fresheneesz 02:08, 19 October 2006 (UTC)[reply]

Agreed. Although whether TTL or CMOS would be better, I'm not sure. I'd prefer CMOS because MOSFETs are easier to understand than bipolar transistors, but more people are familiar with bipolars... 87.75.164.162 21:09, 19 October 2006 (UTC)[reply]

XOR Gate Constructed Using Only NOR Gates - image

Doesn't the schematic actually depict a XNOR gate instead of a XOR gate like it should be?? maybe it's just to late. 130.88.165.70 05:15, 23 January 2007 (UTC)[reply]

I was thinking the same thing as "130.88.165.70 05:15, 23 January 2007 (UTC)" - that picture should have another NOR gate at the end. But I'm pretty new to the whole gate concept[reply]

That last edit was foolish. Exclusive or is not universally defined to give parity. Its definition is disputed. --ToobMug 16:38, 22 April 2007 (UTC)[reply]

Xor has very interesting properties that give it very unique uses, and it would be relevant to mention these applications. For instance, since A^A = 0, xor can identify any numbers that are not duplicated given a string of integers (ie. A^B^C^A^B = C). Also, since A^B=C implies that C^B = A, it can be exploited to create a doubly linked list in which only one pointer is needed per node. Xor is also often used in simple cryptography appications. User:ypg1988 19:52, 3 October 2007 (UST)

I agree with ypg1988: this article should explain the use of XOR in cyptography.

Also, in case anyone feels like making another one of those diagrams, here's another way to make XOR logic out of other types of gates:

>>====OR--------------\
...\\...................................---AND----->
....\\===AND----NOT---/

how does xor gate function with cmos? —Preceding unsigned comment added by 41.204.170.69 (talk) 10:11, 16 October 2009 (UTC)[reply]

I added a circuit diagram for a cmos xor --Wikidood123456789 (talk) 10:14, 7 January 2010 (UTC)[reply]

I'm referring to the example CMOS implementation of an XOR gate.

On CMOS it says "The main principle behind CMOS circuits [...] to create paths to the output from either the voltage source or ground." But when both A and B are not set, there is no path from the output to the ground. So why is this still considered a CMOS circuit? 88.73.98.31 (talk) 08:31, 16 January 2010 (UTC)[reply]

I think you're right. In order for this to be a CMOS XOR gate, transistor connected to Vcc needs to be p-type, making the right two transistors into an inverter. 76.126.57.22 (talk) 05:13, 20 January 2010 (UTC) The bit on the right with 2 transistors is an inverter. —Preceding unsigned comment added by Wikidood123456789 (talk • contribs) 17:29, 5 February 2010 (UTC) im wondering if he vcc could be connected with to diodes to the inputs. Wikidood123456789 (talk) 17:36, 5 February 2010 (UTC) i see now it is a p-type mosfet with a differrent symbol i can upgrade the picture Wikidood123456789 (talk) 18:34, 5 February 2010 (UTC)[reply]

I would criticize this picture as being unnecessarily complex-looking. If you pull it apart it is easier to understand: just two pass transistors and a transmission gate.