All Questions
Tagged with current-sensing analog
11 questions
2
votes
1
answer
215
views
Understanding current sense circuit
I'm trying to adapt a current limiter design that I found, and I'm having trouble understanding the "current sense" part of it.
The current sensing is implemented using a shunt resistor, ...
- 155
2
votes
1
answer
172
views
How to sense a varying current and voltage without affecting the load
I've been asked to build a circuit to switch a constant power (varying current & voltage) supply between two loads, for a research experiment the customer is carrying out. The loads are unknown ...
- 43
0
votes
1
answer
171
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Sensing current into a battery while charging
I want to sense the current into a 84 V battery while charging and disconnect it when fully charged using a MOSFET. Is it advisable to use lowside current sensing? I used a noninverting opamp ...
- 101
0
votes
2
answers
703
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Compact Voltage-Controlled Current Source Array
I'll start by asking what it seems to me a trivial but I don't know what is the most efficient solution. Electronics is not my main occupation, so I may need some indication to proceed:
I need to ...
- 25
0
votes
0
answers
139
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Designing high bandwidth current sensors for inductor current sensing
I am designing a high-frequency current sensor, suitable for sensing +/- 20 Amps at frequencies of 200kHz. This is being used in average current mode control application in an isolated forward ...
- 93
0
votes
1
answer
32
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Current monitor output doesn't respond to load changes
When I physically build this circuit the output voltage doesn't response to load variation.
The voltage across the sense resistor is definitely increasing when decrease the load resistance, the ...
- 377
1
vote
1
answer
56
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XADC Current Sensing Reference Design
Please refer to this reference design for AC701 (snippet below).
The schematics, specifically the current sensing sections in pages 34-36, show this:
I want to understand why, for the REF output of ...
- 121
0
votes
1
answer
75
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Current sensing using XADC
AC701 Schematics
Refer page 40 of the schematics. Here for Vccint- the regulator is switching at 250 kHz.
page 34 has the sensing signal conditioning for that the inst. amp used is INA333 which ...
- 121
2
votes
2
answers
399
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Current Sensing Amplifier Circuit explained
I've been trying to understand why each every comment is in the circuit shown. I understand that the amp is taking the voltage drop across the Rsense and amplifying it such that the current across it ...
- 35
3
votes
1
answer
1k
views
Automatic ranging current sensing
I am trying to implement a current shunt sensing circuit. This should be automatic and currently i want it to measure uA to around 200mA, and Change to the mA range at around 200uA. This is to profile ...
- 231
4
votes
3
answers
3k
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Op amp with transistor in feedback
I am currently looking for a high side current sense IC. I have noticed that most of them that are without galvanic separation, are using an op amp with bjt transistor like in bellow schematics:
The ...
- 1,699