All Questions
Tagged with ltspice oscillator
39
questions
1
vote
0
answers
58
views
Can this oscillator possibly work?
I am trying to build a crude RF oscillator. My first attempt, though it simulated fine, disappointingly did not oscillate when soldered together. So, to debug this, I reduced the simulation example ...
- 564
2
votes
1
answer
121
views
LTspice and ngspice simulation results differ by 5-6GHz
I simulated a basic CMOS inverter based 3 stage ring oscillator in both LTspice and ngspice, using the same model files (using NCSU's freepdk45 models (VTG slow slow corner)). I expected there to be ...
- 505
0
votes
2
answers
137
views
Generating a clear sinusoidal wave through the oscillator to generate the "Ding Dong" sound
I am working on a project to try to recreate a close replica of the "Ding Dong" doorbell sound. I have yet to make the decay. (I would definitely appreciate if you have tips for that.)
I am ...
2
votes
2
answers
123
views
Why do the diodes make a huge difference in an RC sinewave generator circuit?
In the following LTspice simulation of a sine wave generator circuit, it cannot oscillate without D1 and D2, but as long as D1 and D2 are added, (1+R5/R6)=1.5 can also oscillate (as shown in the ...
- 21
1
vote
4
answers
95
views
LTspice: triangle wave circuit not producing any waveform
I've implemented this circuit in LTspice from this Triangle Wave Generator tutorial.
Unfortunately, when I run the simulation, it doesn't produce a wave at all, just a flat VDC output. Any help would ...
- 111
3
votes
1
answer
315
views
Unable to get my astable multi-vibrator working in LTspice
I'm trying to build a basic square wave oscillator using an astable vibrator made with an op-amp for my Intro to Circuits class.
Unfortunately, I cannot get LTspice to simulate the oscillations.
I've ...
- 33
4
votes
1
answer
136
views
Is this supposed to be the output of this circuit?
I used LTspice to simulate a oscillator circuit to convert DC to AC. The oscillator is then connected to a class AB power amplifier to increase the circuit current. The load of the Class AB amplifier ...
- 51
0
votes
2
answers
103
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Why does my oscillator circuit + class AB power amplifier circuit not work?
I am trying to design a oscillator circuit + class ab power amplifier for my circuit. I tried simulation on ltspice but it did not manage to work. I have problem figuring out what is wrong with my ...
- 51
2
votes
2
answers
689
views
LTSpice Colpitts oscillator: How can I compute a priori the output amplitude?
I have simulated this LC oscillator with a MOSFET and it works.
How can I compute the amplitude of the output oscillating signal, theoretically?
- 141
3
votes
3
answers
235
views
LTSPICE: Dirty gate voltage and low gain - Hartley oscillator using MOSFET
I'm designing a Hartley oscillator using a MOSFET, but I have some issues. I've chosen L1 as 3 times L2 to obtain a gain of 3, however, it's more like 2.4.
First of all, I can't understand why the ...
- 31
1
vote
1
answer
834
views
Issues simulating LC oscillator circuit in LTspice
I'm on a quest to simulate various circuits in LTspice that are a part of an Elenco project kit. All has been going well until I started trying to simulate some simple oscillator circuits.
In the ...
- 13
2
votes
2
answers
2k
views
Simulating a RC Phase-Shift Oscillator in LTspice
I'm having some difficulties in simulating this circuit in LTspice. I'm using op amps in the inverting configuration and buffers between each stage but it's simply not working. The simulation runs for ...
2
votes
1
answer
354
views
3-stage Differential Ring Oscillator simulation output remains at DC Value
I'm currently simulating a 3-stage differential Ring Oscillator in LTSpice. I have setup one of my differential stages and created a symbol for it to use in the ring oscillator. I have double checked ...
1
vote
1
answer
454
views
Astable multivibrator not producing a square output wave, using two BJTs
I've been trying to build an astable multivibrator circuit using two BC547B NPN transistors.
I know how to build one using a 555 timer, but I'm having some problems using transistors.
I should've ...
- 121
1
vote
1
answer
174
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Beginner nodal analysis exercise: Why would the voltage of the output of the op amp swing from 15V and 0V when op amp is in the follower configuration
I wanted to analyze the function of this circuit.
When I simulate it the output of the op amp swings from 10 and 15V, but I can't seem to get there based on my analysis (by hand.)
Say we start off the ...
- 21