Questions tagged [rejection]
4 questions
3
votes
2 answers
PSRR of buck converter (or boost)
I want to design a power supply based on a line frequency transformer (50 Hz in my case), and provide a stabilized voltage (15 V) after the rectifier (a classic bridge rectifier with tank capacitor).
To create this stabilized voltage, I would like…
Altheo
- 31
- 1
1
vote
1 answer
Signal to Noise Ratio and Inflection point (PSRR measurement in Oscilloscopes)
I have a 3.3V LDO for which I am supposed to do the PSRR measurement.
I have a keysight scope to do this. While looking at this PSRR YouTube tutorial from Keysight, I have a few doubts.
Around 5:20sec, he tell that there is wiggle in the waveform…
user220456
1
vote
1 answer
Doubt on PSRR calculation and result
I designed the following circuit in Cadence Virtuoso:
It is a two stages op-amp with a compensation network (resistor and capacitor). VDD=1.8 V, VCM=900 mV, VB2=1.28 V.
The DC gain is 73 dB.
1st question: I have to calculate the PSRR (power supply…
Stefanino
- 616
- 4
- 16
0
votes
0 answers
Best connection node of sense pin for regulator?
I'm tring to get a high as PSSR as possible from my ADP7142 LDO. Observe the following application circuit taken from page 1 of the datasheet:
The softstart (SS) pin is not available on my package and not needed in my design.
I'm wondering about…
Tim Walther
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- 11