Fractional-N
Full Member level 1
the circuit below is a replica-feedback bias circuit for a differential delay element.
when I simulate the delay chain with this bias circuit, there is a large sensitivity over supply voltage (Vdd); while there shouldn't be. I mean the circuit is not supply insensitive. can anyone help me? does this kind of biasing really work?
thanks
when I simulate the delay chain with this bias circuit, there is a large sensitivity over supply voltage (Vdd); while there shouldn't be. I mean the circuit is not supply insensitive. can anyone help me? does this kind of biasing really work?
thanks