Who can tell me the specs of your BANDGAP, such as, Noise(10-20KHz) and PSRR(<1KHz)?I am doing a BANDGAP with 10uV output noise and 80db PSRR. It's very hard to realize.
yes, The Vdd voltage is 2.7v to 4.0v. The PSRR is realized.
But the Noise is to hard to realize.
And I will realize a 1.6v output voltage reference. The buffer also contributes noise to the output.
Are you saying that you could reduce 1/f noise by redicing the BW of the buffer.
I haver not read or heard any technique that could reduce 1/f noise by BW reduction.
The buffer would in your explanation work more like a filter if I understand your explanation right. And no filter exsists that could reduce the thermal or 1/f noise or device level noise.
Line regulation is a DC specification no relation to AC at all. You cannot call it low frequency PSRR. And low frequency PSRR sub HZ frequency range affects the offset of the BGR not line regulation. The units of line regulation are change in output voltage for per unit change in supply voltage not decibles. PSRR tells a ac ripple in the supply after how much atteunation appears at the output
Are you saying that you could reduce 1/f noise by redicing the BW of the buffer.
I haver not read or heard any technique that could reduce 1/f noise by BW reduction.
The buffer would in your explanation work more like a filter if I understand your explanation right. And no filter exsists that could reduce the thermal or 1/f noise or device level noise.
Line regulation is a DC specification no relation to AC at all. You cannot call it low frequency PSRR. And low frequency PSRR sub HZ frequency range affects the offset of the BGR not line regulation. The units of line regulation are change in output voltage for per unit change in supply voltage not decibles. PSRR tells a ac ripple in the supply after how much atteunation appears at the output
I also have not read or heard any technique which coulde reduce 1/f noise by BW reducthon. Can you give me some paper about it? In fact, It does so!
BTW: for PSRR, I just care for the low frequecy PSRR(<1KHz), so, it's not necessary to differentiate AC and DC PSRR.