i need to generate a reference current of 5uA. This 5 uA must indepedent of power supply, process and temperature. Any idea or journal i can refer to generate this current? Thanks in advance.
There are four type of current sources. They are proportional to absolute temperature (PTAT); gm-matching; temperature independent;and currents with a negative temperature coefficient (TC). Find in google any of this current source. Or https://www.freepatentsonline.com/
There are four type of current sources. They are proportional to absolute temperature (PTAT); gm-matching; temperature independent;and currents with a negative temperature coefficient (TC). Find in google any of this current source. Or https://www.freepatentsonline.com/
i need to generate a reference current of 5uA. This 5 uA must indepedent of power supply, process and temperature. Any idea or journal i can refer to generate this current? Thanks in advance.
It's very difficult in analog design to obtain PVT stable current reference with high tolerance.
U can make bandgap reference to get stable voltage with 2-3% tolerance (without trimming). To make stable current u can use off-chip resistor. It's one way.
The second one is using on-chip low TC resistor with trimming.
U can make voltage and current references separately or u can make compact circuit.
It's very difficult in analog design to obtain PVT stable current reference with high tolerance.
U can make bandgap reference to get stable voltage with 2-3% tolerance (without trimming). To make stable current u can use off-chip resistor. It's one way.
The second one is using on-chip low TC resistor with trimming.
U can make voltage and current references separately or u can make compact circuit.
yes, thank you.i try already.. i found out it is quite ok to get constant current across power supply and temperature. But quite hard to get across process especially SS and FF.. i think that one might need trimmimg of resistors.
Hello surianova
you can refer this paper in the following site, maybe it is useful.
I am also designing a current reference with invariant for process and temperature.
I also think it is not very difficult for design a current reference with invariant for
temp and power supply.
Is there any good idea to make current reference with indenpendence of Temp and Process. all component should be on-chip. It is better to not use resistor, because it is too hard to make a precise resistor in silicon.
i need to generate a reference current of 5uA. This 5 uA must indepedent of power supply, process and temperature. Any idea or journal i can refer to generate this current? Thanks in advance.
i need to generate a reference current of 5uA. This 5 uA must indepedent of power supply, process and temperature. Any idea or journal i can refer to generate this current? Thanks in advance.