I've carried out some testing on a PWM controller using a 555 timer IC (see attached for circuit diagram) and I am having a little trouble understanding the results.
When the POT resistance is increased the duty cycle decreases. As I understand it, when the resistance is increased the voltage...
I managed to sort my problem out…. sort of.
I found the time taken to make one revolution
Circle time= (1/frequency) x 2 x π
And then made a vector from zero to
circle time x (1/sampling time)
I'm in the process of making a GUI that prompts a user for signal frequency, sample time and length.
If the user enters a sampling rate that is insufficient I want to lay the first cycle of the aliased signal over the original CTsignal to, as you say, illustrate aliasing.
As you can see...
I have a 3 rad/s sine wave that I am sampling every 2 seconds.
The slow sampling has created an alias of -0.14 rad/s.
I have plotted this over the top of the original continuous time signal, please see attachment.
My problem is that I only want to plot the first period of the discrete signal...
I’m doing an assignment which is to analyse the CE amp that incorporates Q1. This involves DC analysis and bandwidth/3db frequencies when the value of Cc is changed.
Raising the value seems to shorten the bandwidth which I’m sure you already know. I still have to investigate the reason for this...
I’ve changed the value of Cc and at 470pF the bandwidth is 15kHz then doubling the Cc the bandwidth almost halves to 8kHz.
Clipping starts at around 80Hz
I've attached the circuit diagram, Cc2 can be omitted the main point of this assignment was to see the effects of changing the value of capacitor Cc.
Input signal is 20mV (19.71mV measured PSPICE voltage)
Output Signal clipped at bottom = 2.09V measured with PSPICE.
Gain also measured = 43.37...
I’m in the process of writing a lab report after testing a cascaded common-emitter amp. The second transistor input is the collector output (collector to base) which I understand to be an emitter follower?
I have used PSPICE to measure the gain when a 20mV signal is applied and I have...
Cheers for your help guys.
The path I ended up going down was:
switch (1)
{
case 0:
count1 = 0xC0; //etc
}
switch (2)
{
case 0:
count2 = 0xC000; //etc
}
switch (3)
{
case 0:
count3 = 0xC00000; //etc
}
switch (4)
{
case 0:
count4 = 0xC0000000; //etc
}...
I need to write some c code that displays a counter value on four 7 segment displays. The number should increment by one every time a button is pushed. I cannot test this code as my home computer will not run Quartus 2 so I am working blind at the moment, but I would still like to ask some...