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Hello,
I've been trying to complete solving this circuit, to find its point of work in DC:
Here are the specification of the mosfets
With the current Ib=1 µA, Vdd=3V, RL=10M Ω , C1= 1pF, C2=C3=100nF.
For the point of work in DC, I have to consider the capacitors as open circuits, so the Vin and the RL are not considered.
The current mirror M1-M2 shows me that the current in M2 is identical to that in M1;
The current mirror M1-M3 shows me that the current in M3 is 10µA;
The same current IB is present in M6, so M1 and M6 have the same current.
Now I have doubts how to go forward from here, Vgs of M6 is Vgs=2V, how do I find the M6's gate voltage for sure if I'm not sure of its voltage source? M6's gate is also V3.
The biggest challenge I find however, is that I can't calculate for sure the V1 and the V2, which are respectively the gates of M5 and M4, a C-MOS, I need to find at least one of the voltages, my idea is to put the currents of the C-MOS in an equation:
Im5=Im4
k5(Vs5-Vg5 -|Vt|)^2 = k4(Vg4 -Vt)^2, with Vs4=0V as it's connected to the ground.
How do I proceed from here?
I've been trying to complete solving this circuit, to find its point of work in DC:
Here are the specification of the mosfets
With the current Ib=1 µA, Vdd=3V, RL=10M Ω , C1= 1pF, C2=C3=100nF.
For the point of work in DC, I have to consider the capacitors as open circuits, so the Vin and the RL are not considered.
The current mirror M1-M2 shows me that the current in M2 is identical to that in M1;
The current mirror M1-M3 shows me that the current in M3 is 10µA;
The same current IB is present in M6, so M1 and M6 have the same current.
Now I have doubts how to go forward from here, Vgs of M6 is Vgs=2V, how do I find the M6's gate voltage for sure if I'm not sure of its voltage source? M6's gate is also V3.
The biggest challenge I find however, is that I can't calculate for sure the V1 and the V2, which are respectively the gates of M5 and M4, a C-MOS, I need to find at least one of the voltages, my idea is to put the currents of the C-MOS in an equation:
Im5=Im4
k5(Vs5-Vg5 -|Vt|)^2 = k4(Vg4 -Vt)^2, with Vs4=0V as it's connected to the ground.
How do I proceed from here?
