Re: Need startup circuit for self-bias voltage/current refer
if the circuit is self-biased it contains a zero solution. let's say your circuit uses an amplifier or level shift stage. if this current is set by the bandgap then the bandgap has to be running for that current to exist. also, that current must exist to allow the bandgap to run. this would be one instance of a zero solution.. no current = no bandgap = true.
now if the amplifier operates on a current generated somewhere else and fed into the cell, the current is always on, so the amp is always on regardless of whether the bandgap is on. now the bandgap is always brought into regulation since the output of the amp is true regardless of whether the bg is on or not.
what circuit are you using? it may be easier to see the archetecture and tell you how to start it up.