Take a look at the circuit(BGR)

[liuguojia387]

I found the circuit in a paper.But one of my collaegues pointed out it has one fault about mismatch.

I want to know the difference betweeen the circuit and the typical BGR which use an amplifier to assure the equality ?

Who can give me advantages and disadvantages of the two circuits?

thank you for your answers!

 

[mikersia]

Advantage of this circuit is higher power supply rejection (PSR) due to embedded voltage regulation. But be carefull with it implementation,- I met on practice with it unsimulated unstability. Suppose that AC model of bipolars wasn't fully correct,- this unfortunately is typical for many manufacturers.

 

[liuguojia387]

Advantage of this circuit is higher power supply rejection (PSR) due to embedded voltage regulation. But be carefull with it implementation,- I met on practice with it unsimulated unstability. Suppose that AC model of bipolars wasn't fully correct,- this unfortunately is typical for many manufacturers.

I'm sorry,but what is unsimulated unstability?

 

[cheinkuos]

what papaer do you research and why you pick up this schematic of BGR?
i looks so complex~~

 

[liuguojia387]

what papaer do you research and why you pick up this schematic of BGR?
i looks so complex~~

I refer to this paper .

 

[mikersia]

Unsimulated unstability was concluded in fact, that the manufactured BGR structure had oscillations, which didn't reproduced by any simulations, including extracting all layout parasitics.