In the case od circuit with R1 upper mosfets M3 and M4 are still on while one of the input mosfet M1, M2 is off. It should be faster. It also enables smaller sizes of M3 and M4, because of they have smaller maximal circuit.
vout=gm1*(0.5*R1||1/gm3)(vg1-vg2)
In the case od circuit with R1 upper mosfets M3 and M4 are still on while one of the input mosfet M1, M2 is off. It should be faster. It also enables smaller sizes of M3 and M4, because of they have smaller maximal circuit.
vout=gm1*(0.5*R1||1/gm3)(vg1-vg2)
in what applications could i use this type of circuits according to the above explanaition? i mean why could i need M3 and M4 to always on ? why not only one of them?
This circuit has low gain, which probably means that it was used for high speed design.When you turnon/off mosfet you usually need some additional time.