|Oct11-07, 02:28 PM||#1|
BJT amplifier frequency response.
Today I did a lab on BJT amplifier frequency response.
I got the fc1 and fc2,BW and F0 center frequency. The band pass turned out to be asymmetrical.
What i want to know is this.
cut off V=1.41Vpp
When I turned up the frequency to 2fc2, i got about 0.84Vpp and 4fc2=0.47Vpp.
Theoretically 8fc2 would have yielded 0.235Vpp correct? No problem.
When i did fc1/2 i got 0.58Vpp and fc1/4 0.22Vpp. I guess there are reasons at such a low frequency why i wouldnt get half of 0.58Vpp.
My question is between the 4 values that I have told you, what are the relationships between fc1/2 and 2fc2.....and... fc1/4 and 4fc2.
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