All Questions
19
questions
0
votes
4
answers
732
views
Relationship between Vin and Vout of a linear voltage regulator in saturation region
Suppose we have a linear voltage regulator:
simulate this circuit – Schematic created using CircuitLab
If Vin is above Vth Vout is costant for all values Vin may take.However if Vin is below ...
- 111
0
votes
1
answer
213
views
Simplyfing a circuit by replacing two nodes with a voltage source and removing a connection between resistors
I am given the first circuit (A) and I have to find the voltage across R4. Since the potential at node C is independent (V2), I was thinking about a possible transformation to circuit B. However, I am ...
- 5
0
votes
1
answer
157
views
Switching between ac-to-ac transformer taps in regulated linear voltage power supply
I am new to electronics and working on building regulated linear bench power supply 0v to 30v, 3A as my first project.
For better performance, wanted to switch between multiple tapas of ac-to-ac ...
0
votes
1
answer
75
views
Positive Voltage on inductor
I am doing some problems in linear and nonlinear circuit analysis, so I have a question...why is the voltage on an inductor represented as \$V=L\frac{di}{dt}\$ instead of \$V=-L\frac{di}{dt}\$, I know ...
-1
votes
1
answer
306
views
Can someone help me solve this?
A linear circuit is shown in the figure below
The VCCS (voltage controlled current source) is defined as 𝑖1=𝛽 ⋅𝑣𝐴 .
The other elements in this circuit have the following values: 𝑅1=3.3𝑘Ω , 𝑅...
- 5
0
votes
2
answers
61
views
Current flow and voltage difference
When there is a potential difference between two points in an electric circuit current flows . Then why does not current flow through an open circuit?
0
votes
5
answers
546
views
Why is the linear voltage regulator going hot although within its specification?
I'm having an issue with my NCP718 voltage regulator overheating to the point of thermal shutdown. I have attached a photo of my schematic. I am inputing ~15-20v and outputting 4V from the reg. The ...
- 15
0
votes
3
answers
49
views
Output drop/change in linear circuits
Lets say I have a linear circuit with some input and output voltages. Assume this is a block with inputs/outputs. When I connect input of another block to the output of my first block, I observe that ...
- 177
1
vote
2
answers
455
views
NCP1117 Regulator voltage feedback not working correctly
I'm having a brain fart. Reading 3.1V ish on the output. My +5V0 net is after a schottky diode with 5V + a little bit coming from the NCP1117, and another 5V0 coming from a USB connector. Reason being ...
- 143
0
votes
1
answer
476
views
Less noisy version of max232
After (mentally) banging my head at the wall wondering why my own circuit is glitchy after the PC communicates with it, I read some posts, and noticed others had very similar problems. All because the ...
0
votes
1
answer
921
views
Convert linear voltage to PWM
I'm trying to convert a linear voltage to a 21kHz PWM signal using passive and active components.
Do you have any idea how I can achieve this ?
I tought about comparing my linear voltage to a ...
- 5
1
vote
0
answers
112
views
Linear Regulator Operation
I have a linear regulator with three pins. It's identifier is LM7805.
I've taken a look at it's datasheet and it looks unlike linear regulators I've encountered.
Is the the op amp circuit included in ...
- 121
3
votes
6
answers
1k
views
Converting 0-5 volts (linear) to +2.5 -- 0 -- +2.5 volts ("vee")
I'm trying to find a simple way to convert a 0-5 V output from a joystick hall effect sensor to +2.5 -- 0 -- +2.5 V. Here's how I want the response to look:
The output voltage will be sent to a ...
- 343
0
votes
1
answer
440
views
Linear voltage regulator failure?
I've been building USB powered audio DAC circuit which is using multiple LDO voltage regulators.
I discovered one of the regulators, namely TPS79333, which is responsible for supplying 3.3V to ...
- 11
-1
votes
1
answer
265
views
Linear regulator dropping too much voltage on load
I'm trying to get around 4V for a project from a 5V input, but while following the designs in http://www.telit.com/fileadmin/user_upload/products/Downloads/3G/Telit_UL865_Hardware_User_Guide_r7.pdf ...
- 13