Tagged Questions

2
votes
2answers
101 views

Problem of noisy ground

In this design, the 2A motor "M", which is running at PWM=10kHz, creates a lot of noise in the ground as shown on the scope trace. Not only the ground is sinusoidal but more painful, the ground level ...
3
votes
3answers
122 views

Using noise to increase effective resolution of ADC

I managed to increase the effective resolution of a 10 bit ADC by several bits by repeatedly sampling a noisy input and taking an average over many samples. I'm wondering what some techniques are ...
4
votes
0answers
86 views

How to create a noise budget and what to do with it afterwards?

While reading some questions/answers on this site, I came across this answer from Scott Siedman and I found it interesting. So, work out your noise budget, figure out how many bits you need, and ...
0
votes
1answer
74 views

How do I pick an ADC to monitor the output of a switching regulator?

I am currenly designing an automatic tester to test the switching regulators on my boards. I will be doing load step tests, and I want to be able to catch defective regulators, i.e., ones that are not ...
2
votes
2answers
600 views

Interface a 5v pressure sensor with a 3.3v ADC

I'm trying to interface a pressure sensor (MPXV6115vc6u) with a 3.3v ADC. My board is providing a 3.3v (it's a XBee power regulated board, via a Li-Po battery). To wire the MPX sensor, I need to: ...
2
votes
0answers
362 views

Voltage Fluctuations in Arduino-opamp-thermistor circuit [closed]

I'm working on a board that takes measurements of voltage off a thermistor through an Arduino and amplified by an opamp (really an instrumentation amp AD623), also there are two potentiometers. See ...
2
votes
2answers
1k views

STM32F103 ADC Noise

I am new to this forum. I have read the questions and answers in this forum on the similar topics but that one was for STM32F2 CPU. I am using STM32F103 and I have similar problem. Similar to the ...
6
votes
4answers
2k views

STM32 ADC Noise 2

I have just tested my second design with STM32F2, now it is STM32F207ZFT6, the ADC behaviour is the same as in my first application - strong noise in ADC. Noise of current input without any ...