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Can't understand a symbol in circuit. PLeaseHELP.

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yugal0007

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sch528.gif

Schematic is attached (image file).
In schematic there's Vss. Now what i understand is Vss refers to ground.
also there's another symbol "#GND"
Now i can't diffrentiate this symbol with Vss.
Also there's a note written its attached here ed.jpg

Please clear my doubt. do i have to connect #GND and Vss with the GND terminal of my POWER SUPPLY UNIT???
or i have to do smthng else?
Please suggest.
 

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Vcc and Vdd is for positive supply - Dont know why he gave vdd as signal gnd, probably he might get the signal switching from VDD and GND from that connector, but signal name VDD is wrong
Vee and Vss is for negative supply - #GND not GND.
 
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