Does the Razavi cover art make any sense?

[jaydnul]

Hi,

I have a copy of the Razavi CMOS indian edition and have been looking at the cover for the past 20 minutes :laugh:

https://easyengineering.net/wp-content/uploads/2018/01/81-Fyis7toL.jpg

So first of all there is a typo i think. The two inputs of the op amp clearly shouldnt be shorted, but even when they are not, does this circuit do anything? I'm just curious if that is a topology i have never seen before, it looks like the output will always be high since the inverting input is always ground potential.

Thanks

 

[wwfeldman]

you're probably right about the two inputs of the op amp
note however that all other connections have a dot on them

as for the topology, its just cover art

i think you'll be better off looking inside rather than outside