mmkfc
Newbie level 3
I am curious what is the first thing to look at when designing a power amplifier at specific frequency, is it bias Vs Ft? Also, is that the same for all the class (A,AB,C,etc)?thx
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Power amplifier circuits (output stages) are classified as A, B, AB and C for analog designs, and class D and E for switching designs based upon the conduction angle or angle of flow, Θ, of the input signal through the (or each) output amplifying device, that is, the portion of the input signal cycle during which the amplifying device conducts. The image of the conduction angle is derived from amplifying a sinusoidal signal. (If the device is always on, Θ = 360°.) The angle of flow is closely related to the amplifier power efficiency.