lhlbluesky
Banned
in dynamic comparator design of differential pair, i have some questions here.
fig1 is the schematic, fig2 is the design equation.
d=ID5/ID6, e=Vin/Vref, W1=W2, W3=W4.
but how to decide the value of ID5, ID6, d? because M5 and M6 are controled by clock signal Vclock, so the current of M5, M6 is difficult to set, so how to get an accurate ratio of d?
besides, k' is not a constant also, how to consider its value?
in my design, the value of ID5 and ID6 is changing with different size of (W/L)5 and (W/L)6, and the offset is different also for different size of M1~M4 and M5~M6, how to understand this?
please help me, and give me a clear explanation about the diferential pair comparator design, thanks.
fig1 is the schematic, fig2 is the design equation.d=ID5/ID6, e=Vin/Vref, W1=W2, W3=W4.
but how to decide the value of ID5, ID6, d? because M5 and M6 are controled by clock signal Vclock, so the current of M5, M6 is difficult to set, so how to get an accurate ratio of d?
besides, k' is not a constant also, how to consider its value?
in my design, the value of ID5 and ID6 is changing with different size of (W/L)5 and (W/L)6, and the offset is different also for different size of M1~M4 and M5~M6, how to understand this?
please help me, and give me a clear explanation about the diferential pair comparator design, thanks.
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