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At what VBB values would you now consider the 2N3906 PNP to be “ON” and “OFF”?
Vbb=0,npn=open,vbe=12v-12=0pnp=open, vce=12v,ic=0,ie=0
Vbb=12,npn=short,vbe=12-11.2=0.8v,pnp=closed,vbe=0,ic=(vcc-vce)/rc(11.33mA, ie=13.05ma
How did adding the 2N3904 NPN transistor change the switch operation? What “logic” level at the input is now needed to turn the switch ON?
Vbb=0,npn=open,vbe=12v-12=0pnp=open, vce=12v,ic=0,ie=0
Vbb=12,npn=short,vbe=12-11.2=0.8v,pnp=closed,vbe=0,ic=(vcc-vce)/rc(11.33mA, ie=13.05ma
What “logic” level at the input is now needed to turn the switch ON
Vbb=0,npn=open,vbe=12v-12=0pnp=open, vce=12v,ic=0,ie=0
Vbb=12,npn=short,vbe=12-11.2=0.8v,pnp=closed,vbe=0,ic=(vcc-vce)/rc(11.33mA, ie=13.05ma
At what VBB values would you consider the TIP127 to be “ON” and “OFF”? How does this compare with the previous circuit
Vbb=0,npn=open,pnp=open,vce=12v, ic=0,ie=0
Vbb=12, npn=short,pnp=short,vce=0v, ic=vcc/rc,ie=13ma
In what ways is this circuit different from the previous one?
Vbb=0,npn=open,pnp=open,vce=12v, ic=0,ie=0
Vbb=12, npn=short,pnp=short,vce=0v, ic=vcc/rc,ie=13ma
At what VBB values would you consider the IRF9510 to be “ON” and “OFF”? How does this compare with the previous circuit?
Vbb=0,npn=open,vgs=12v, nmos=short
Vbb=12v,npn=short,vgs=0,nmos=open
At what VBB values would you consider the IRF9510 to be “ON” and “OFF”?
Vbb=0,npn=open,vgs=12v, nmos=short
Vbb=12v,npn=short,vgs=0,nmos=open
In what ways is this circuit different from the previous one?
Vary VBB between TTL & CMOS logic levels. What input logic level turns the motor ON? And OFF
Part1 Vbb=0,npn=open
Vin=0
Nmos=open
Vgs=vin-vss
vgs=0-12v
vgs=-12v
Pmos=short Vbb=12,npn=short
Vin = 12
Nmos=short
Vgs=vin-vss
Vgs=12-12
Vgs=0
Pmos=open
Part2 Vbb=0,npn=open
Vin=0
Nmos=open
Vgs=vin-vss
vgs=0-12v
vgs=-12v
Pmos=short Vbb=12,npn=short
Vin = 12
Nmos=short
Vgs=vin-vss
Vgs=12-12
Vgs=0
Pmos=open
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Vary VBB between TTL & CMOS logic levels. What input logic level now turns the motor ON and OFF?
How does the CMOS totem pole work?
Circuit 1.
Vbb=0,npn=open,vbe=12v-12=0pnp=open, vce=12v,ic=0,ie=0
Vbb=5,npn=short,vbe=12-11.2=0.8v,pnp=closed,vbe=0,ic=(vcc-vce)/rc(11.33mA, ie=13.05ma
Circuit 3
Vbb=0,npn=open,pnp=open,vce=12v, ic=0,ie=0
Vbb=12, npn=short,pnp=short,vce=0v, ic=vcc/rc,ie=13ma
Circuit 4
Vbb=0, npn=open,vgs=-12,pmos=short
Vbb=5,npn=short,vgs=0,pmos=open
Circuit 5
Vbb=0,npn=open,vgs=12v, nmos=short
Vbb=12v,npn=short,vgs=0,nmos=open
Circuit 6 Part1 Vbb=0,npn=open
Vin=0
Nmos=open
Vgs=vin-vss
vgs=0-12v
vgs=-12v
Pmos=short Vbb=12,npn=short
Vin = 12
Nmos=short
Vgs=vin-vss
Vgs=12-12
Vgs=0
Pmos=open
Part2 Vbb=0,npn=open
Vin=0
Nmos=open
Vgs=vin-vss
vgs=0-12v
vgs=-12v
Pmos=short Vbb=12,npn=short
Vin = 12
Nmos=short
Vgs=vin-vss
Vgs=12-12
Vgs=0
Pmos=open
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