nand gates inverter

Question

There are 2 ways to use 2 input nand gates as a inverter. I know one of them, which is make 2 inputs connected to one input signal.

schematic

^{simulate this circuit – Schematic created using CircuitLab}

Can someone tell me another one?

\$\begingroup\$ hint it's not if one input =0 \$\endgroup\$
– D.A.S.
Commented May 27, 2017 at 15:19 — D.A.S., Commented May 27, 2017 at 15:19

TonyM · Accepted Answer · 2017-05-27 15:11:40Z

1

It's this:

schematic

^{simulate this circuit – Schematic created using CircuitLab}

answered May 27, 2017 at 14:49

TonyM

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\$\begingroup\$ I'd recommend replacing Vdd with "logic 1" as more general. At the least, the poster might be using TTL logic, which doesn't use Vdd (or at least it 's not usually called that, rather Vcc). \$\endgroup\$
– WhatRoughBeast
Commented May 27, 2017 at 15:04
\$\begingroup\$ Yeah, fair enough @WhatRoughBeast. I considered both but looking back it's a logic question, not an implementation/circuit question. \$\endgroup\$
– TonyM
Commented May 27, 2017 at 15:11

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