All Questions
Tagged with current-sensing comparator
5 questions
4
votes
4
answers
248
views
Charge indicator with comparator - very sensitive to noise
I need an indicator when the current from my charger is larger than 100mA. I tried the below circuit but this seems very sensitivity to noise. Probably I am getting some ripple in the mV range from ...
- 265
2
votes
0
answers
30
views
Window current detection through a current sense differential amplifier and a comparator
I'd like to implement a circuit to detect the over-current through a grounded load. The limits for that current are either 3mA DC current or -3mA and 3mA in case of bipolar AC current. I want to ...
- 97
1
vote
2
answers
1k
views
Current sensing with Rdson?
I'm fooling around with a PMOS, a Fairchild FDD6637, and pondering whether it would be possible to use Rdson as a sort of shunt-resistance for measuring the voltage drop, to get the amount of current ...
- 980
0
votes
1
answer
420
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LTspice simulation of a fluxgate excitation circuit with H bridge driver, Op-Amp and comparator not behaving as expected
Please see the following LTspice schematic:
This is an excitation circuit for a fluxgate current sensor. The inductor L1 models the magnetic core's B-H loop and dimension along with a sensing winding ...
- 93
0
votes
0
answers
50
views
SCR falsely triggered on startup (battery low current monitor)
I'm trying to build a li ion low charge current detector and cutoff circuit as a complement to my battery charging setup. Charging should be disconnected when the current reaches 400mA or below. I'...
- 1,696