Generating a rippled voltage supply

  • Thread starter Thread starter taleebe
  • Start date Start date
  • Tags Tags
    Supply Voltage
AI Thread Summary
The discussion focuses on generating a rippled voltage supply using a BJT power follower in SPICE simulation. The user seeks guidance on modeling the circuit with a sinusoidal input of 200mV amplitude and a frequency range up to 20 MHz, aiming for a flat output voltage around 3.3V while handling a load that sinks up to 1A. A suggestion is made to DC couple the output by removing a capacitor, which would allow both AC and DC components at the output. The user is currently experimenting with different NPN BJTs for the simulation. Overall, the conversation emphasizes the importance of circuit configuration and component selection in achieving the desired output characteristics.
Engineering news on Phys.org
Sure. You want to model a BJT power follower in SPICE? Can you post a copy of your SPICE deck?
 
im thinking of a schematic like this with vin as a varying sinusoidal input(0-20 Mhz) of amplitude 200mv. I want vout to be reasonably flat across this range.Also at my output id like to have a DC of around 3.3V. It is also worth noting that my load sinks up to 1A of current.Is it worth a shot?
 

Attachments

  • Picture 5.png
    Picture 5.png
    26.2 KB · Views: 508
That's a good start for a circuit to simulate, but I'd DC couple the output (delete C3). Which NPN BJTs were you thinking of simulating?
 
i see...deleting C3 would let me have AC and DC at the output!
as for the type of NPN to use I am not really sure,right now its trial and error
 

Thread 'What happens if shielded cable has a short to the shield?'

While I was rolling out a shielded cable, a though came to my mind - what happens to the current flow in the cable if there came a short between the wire and the shield in both ends of the cable? For simplicity, lets assume a 1-wire copper wire wrapped in an aluminum shield. The wire and the shield has the same cross section area. There are insulating material between them, and in both ends there is a short between them. My first thought, the total resistance of the cable would be reduced...
View full post »

Thread 'Underwater piezoelectric sensor array receive sensitivity'

Hi all I have some confusion about piezoelectrical sensors combination. If i have three acoustic piezoelectrical sensors (with same receive sensitivity in dB ref V/1uPa) placed at specific distance, these sensors receive acoustic signal from a sound source placed at far field distance (Plane Wave) and from broadside. I receive output of these sensors through individual preamplifiers, add them through hardware like summer circuit adder or in software after digitization and in this way got an...
View full post »

Thread 'Question about bonding ground and neutral'

I am not an electrical engineering student, but a lowly apprentice electrician. I learn both on the job and also take classes for my apprenticeship. I recently wired my first transformer and I understand that the neutral and ground are bonded together in the transformer or in the service. What I don't understand is, if the neutral is a current carrying conductor, which is then bonded to the ground conductor, why does current only flow back to its source and not on the ground path...
View full post »

Similar threads

Can power supplies/adapters be used to clean up dirty generator power?
2
Replies
61
Views
9K
Designing a ripple low PS for DDS function generator
Replies
6
Views
1K
Query about the time average of an AC power supply
Replies
2
Views
2K
Generating a rippled voltage supply
Replies
14
Views
5K
Increased current at a home dropping neighbors voltage?
Replies
7
Views
5K
3-Phase Voltage Supply Simulator
Replies
1
Views
7K
Superposition Theorem (basic query)
Replies
8
Views
2K
Understanding Capacitor Behavior for Noise Filtering?
Replies
15
Views
4K
Extremely high current effects in semiconductors
Replies
11
Views
2K
Power grid & generator questions
Replies
46
Views
6K

Hot Threads

Recent Insights

Back
Top