Find Q Factor of Resonant Amplifier Circuit

AI Thread Summary
To find the Q factor of a resonant amplifier circuit, the output impedance R is crucial, particularly since there is no collector resistor present. The output resistance primarily arises from the transistor's collector to emitter junction, which typically has a value around 50 K ohms. Without a defined R, traditional Q factor equations like Q = (ωL/R) or Q = (Dynamic R/ωL) cannot be applied. Understanding the specific transistor characteristics is essential for accurately determining this output impedance. Ultimately, the Q factor can be calculated once the output resistance is established.
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How find Q factor of this resonant amp cct.because "R" is not theare,
cant apply " Q=( ωL/r) or =(Dynamic R/ωL) "
 

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The resonant tank is driven by a transistor current source which has some output impedance R
 
waht said:
The resonant tank is driven by a transistor current source which has some output impedance R

Please tell me what is the R. how find that value?
 
Since there is no collector resistor, the only output resistance comes from the transistor's collector to emitter junction. It depends on the transistor you use, but generally is about 50 K.
 

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