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help with 0.75V Reference voltage design

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hello, anyone. Recently, i want to design a circuit of 0.75V reference voltage. i have researched the majority of the IC manufacturers' material, but i still cannt find a suitable design for my circuit.
could anyone offer some materials about the circuit design? thanks.
 

I assume you have a limited supply voltage otherwise you could scale a 1.25V one?

Assuming you are designing an IC then there is a 0.5V one here that works down to a Vcc of 0.9V: F27 on page 5-71. The principle can probably be used on a CMOS process as well.



If you just want to buy one off the shelf, I am not sure. National say their LM4140 is available as a custom device down to 0.5V, but that probably doesn't help.

Diodes Inc do a 0.6V one the ZXRE060 although I don't know anything about it.

Keith.
 

Depends on the accuracy most silicon diodes have a forward voltage drop of around 6-700mv. Gemanium and shotkey diodes are lower. Maybe you could get slightly higher with series diodes and then scale. Depends on the current you need.
 

keith1200rs said:
I assume you have a limited supply voltage otherwise you could scale a 1.25V one?

Assuming you are designing an IC then there is a 0.5V one here that works down to a Vcc of 0.9V: F27 on page 5-71. The principle can probably be used on a CMOS process as well.



If you just want to buy one off the shelf, I am not sure. National say their LM4140 is available as a custom device down to 0.5V, but that probably doesn't help.

Diodes Inc do a 0.6V one the ZXRE060 although I don't know anything about it.

Keith.
Click to expand...
hey, Keith.thanks for your reply. the material"http://www.diodes.com/datasheets/ZXRE060.pdf" helps me a lot. and i know how to solve it now. really thanks.

Added after 1 minutes:

GrandAlf said:
Depends on the accuracy most silicon diodes have a forward voltage drop of around 6-700mv. Gemanium and shotkey diodes are lower. Maybe you could get slightly higher with series diodes and then scale. Depends on the current you need.
Click to expand...
anyway,thank you.
 

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