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Hi Guys,
So I'm finally coming to the end of my assignment, I have to hand in tomorrow morning, and there are just a few questions left that I'm having some difficulty with and I'd really appreciate it if you guys could give me some pointers with them, thanks again already for all the help that...
What models are you trying to use from this library, are they available separately as PSpice models which are easily importable? Can you open adhlib in notepad, if so what does it look like?
Hey, thanks for your reply and sorry for the confusion! :/
Unfortunately I am having to upload these as images and cadence doesn't really have too many options for adding things like that, but the graphs are in dB. This is indicated by the small notation in the corner of DB(V(R29:2)). With so...
Thanks a lot for your response! Audioguru's comments made me think that he was looking for the frequency points at the actual -3dB level rather than -3dB below the top frequency...
Hey guys,
Thanks a lot for your help so far, here are some updates and I'd love to hear if I'm going right. So I've rerun the simulation with an AC source at 0.1V attached are the schematics and the output trace. Then for the upper bound of the 0.1V input a 1V RMS input is applied at that...
Ah, now I understand! Thanks for taking the time to explain, I'll rerun the simulation with 1VAC. This probably seems like a stupid question, but what exactly is the difference between the SINE and AC source? I mean an AC source is just a sine wave, with the amplitude of the wave being the peak...
Hi, thanks for taking the time to reply! :) I am not quite sure what you mean about there being no AC input to the simulation circuit. On the far left hand side there is an AC input of 0.1 V on the first example and 1.414V in the second example...
I'm really sorry, I'm still a little bit confused. To recap:
1. So far I've set the input to 0.1V and measured the -3dB bandwidth using this method: http://www.sengpielaudio.com/calculator-cutoffFrequencies.htm. Then looking through the article provided by Audioguru I have determined the effect...
Thanks a lot for your speedy response, it's really appreciated! Thanks for the link to the article it was very useful and I had searched it before, however I hadn't realised that the component values were different from the ones he was referencing - hence I didn't immediately find the reference...
Hey everyone,
I've been working through some of the questions for this amplifier and so far it's been going well, however, now I've been tasked with measuring the high and low power bandwidths. I know what bandwidth is but I am having troubles where and what exactly I should measure, if you...
So, I have set the input to 0 and altered the variable resistor PR1 to adjust the output current to allow the emitter voltage from the transistors to be approximately 50mA. However the current from both emitters is not strictly measured as +50mA, one is positive and the other is negative. I'm...
Hi everyone,
So, thanks to all your help, which I will reference at the end of this report, I have changed the circuit diagram appropriately. I have also changed the input voltage as specified in a part of the report to 1.414V, equivalent to RMS 1V. The output is much improved! All is well...
I am aware of the basic facts about amplifiers in general, specific audio amplifiers are new to me. An audio amplifier needs a power supply for obvious reasons - you don't get an amplified signal for nothing, you need power for the amplifying circuit to work. An amplifier's gain is its...
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