leohart
Full Member level 4
Both have no ground pin but only V+ and V- supply pin while The single supply opamp: v+ -> VDD,v- -> GND. Dual supply opamp: v+ -> VDD v- ->VSS. But how does the opamp know this difference in supply configuration? I think every opamp can be used as single or dual supply depend only on how you connect V+ and V- supply pin, So why we still diff single/dual supply opamps?
Anyone knows why?PLS give your comments,thx!
ps:In razavi,he always connect a ckt to vdd in the upper,and to gnd in the bottom. Gray connect always to vdd and vss. Some other books have both configurations.But it seems bjt always use vdd and vss, but cmos can use both vdd and gnd or vdd and vss.
Is there any difference here?Can I use vdd/gnd and vdd/vss interchangably in all this ckts?
Anyone knows why?PLS give your comments,thx!
ps:In razavi,he always connect a ckt to vdd in the upper,and to gnd in the bottom. Gray connect always to vdd and vss. Some other books have both configurations.But it seems bjt always use vdd and vss, but cmos can use both vdd and gnd or vdd and vss.
Is there any difference here?Can I use vdd/gnd and vdd/vss interchangably in all this ckts?