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Hi Meliza,
Well adjusting the amplitude of ur bandgap reference depends on the type of ur reference.
If it is in a type that it first sums PTAT and CTAT current and then conducting this current through a resistor to generate voltage with low TC, in this way u have to change just the resistor to...
comparative study of temperature curves in bandgap reference
Hi all,
I wanna know which of these two curves (attached file) is better for bandgap reference?
(assumption:both curves have same temprature range and same voltage variation and same output voltage OR better to say same PPM/C)
Thanks.
Hi Junus,
As I know one of issues which can be discussed is fabrication.
Generally making a PNP BJT in CMOS technology is more easier.
you can find this in this picture.
Hi erikl,
could you clarify your answer!
As i know start-up circuit will go off immediately after making circuit to work and as transient time it will take some micro seconds to have output voltage ,so start-up circuit will go off after start of main crcuit not after reaching output voltage...
Hello to all
I wanna know if someone can help me to find a suitable start-up circuit for designing high PSRR BGRs?
Or better i say ,does start-up circuit affect PSSR of BGR?
Thanks.
Hi Junus,
As my experience helps designing an up-1v BGR without using BJT for low ppm/c output voltage is not possible , but for sub-1v BGRs (around 0.1v to 0.3v) it is possible to design Fully mosfet with low ppm/c for output voltage.
Now about your question, As i have mentioned the CTAT...
Hi
Well, for a beginner it is vitaaly needable to know that there are two main cores in Bandgap reference (BGR).
1-PTAT
2-CTAT
These two can be Vptat+Vctat OR Vptat+R*Ictat OR R*Iptat+Vctat OR R*(Iptat+Ictat) for generating low temprature coefficient output voltage in BGRs.
Well I put a pdf...
Hello to all,
As i know there are three main different bandgap references:
1-BJT core Bandgap reference
2-Fully Mosfet bandgap reference
3-Mixed BJT and MOSFET core Bandgap Reference
I wanna know which of these three are better for designing a sub-1v and up-1v bandgap references with less...
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