I am working on an oscillator project

Thread Starter

Kash111

Joined Jun 6, 2023
9
I am working on a common-base Hartley oscillator assignment. I'm unsure if the circuit for the common base is correct because there is no output signal at all. I feel disappointed. :(
 

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Thread Starter

Kash111

Joined Jun 6, 2023
9
Hi Kash,
Welcome to AAC.
Post your LTSpice asc file, we then can guide you.
E

BTW: your image is too small to read.
Thanks!

What I am wondering is whether this circuit is a common base circuit.
Additionally, no matter how many combinations of L and C are used, normal oscillations do not occur.
Lastly, what I desire is a frequency of 1MHz. ( hartly )
 

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wayneh

Joined Sep 9, 2010
17,498
I haven't played with your simulation but I speculate you may need to perturb the circuit to get the simulation going. Maybe send it a voltage spike?
 

ericgibbs

Joined Jan 29, 2010
18,984
hi Kash,
As this is a homework assignment, you should work out the answer yourself to those two questions.
Work out the output impedance of the Collector circuit and the 50k load for the magnitude.

E
 

Thread Starter

Kash111

Joined Jun 6, 2023
9
hi Kash,
As this is a homework assignment, you should work out the answer yourself to those two questions.
Work out the output impedance of the Collector circuit and the 50k load for the magnitude.

E
Thank!

I am not familiar with LTspice, can I get the command to check the maximum value in the fft graph or can I know how to find the value corresponding to 1MHz in fft graph ?
I tried '.meas FFT max V(OUT)' but it didn't come out,,
 

ericgibbs

Joined Jan 29, 2010
18,984
hi K,
Right click on the Plot > View> FFT
You already have the magnitude of 1MHz in expanded plot, post #7 label
E
EG57_ 865.png
 
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