NOR in CMOS Logic

NOR in CMOS Logic can be discussed just reversely to NAND.

The truth table for NOR is as below.
Truth table for NOR

In the case only both inputs are zero, the output is positive.

The important feature of NOR circuit is, nMOS are arranged parallel and pMOS are serial.
Truth table for NOR

It’s a beautiful symmetry, though I always forget that pMOS opens when its input is zero (and its drain is grounded) .

Advertisements

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s