If you want to climb the learning curve with grace, and start designing what you need immediately, this easy-to-understand guide will help you design an entire radio system from the ground up.
Any component that can amplify a DC and/or AC signal, such as a JFET, BJT, MOSFET, etc.
Active region
The 0.2-V range of VBE in which a BJT is capable of amplifying an incoming signal. It is the region between saturation ( VBE = 0.8 V) and cutoff ( VBE = 0.6 V); within these two VBE values the IB, and thus the IC, is controlled.
AGC saturation point
An area in which any further increase in AGC voltage becomes nonlinear, or saturates, at the AGC knee.
Application specific integrated circuit (ASIC)
A custom-designed and -built integrated circuit.
Automatic noise limiter (ANL)
A diode circuit that is located after the baseband detector to cut off any noise spikes that would reach the audio section of an AM or SSB receiver.
Average power
Since peak power is the power at the highest amplitude of a digital pulse, most measuring devices would have difficulty measuring a rapid and changing peak amplitude. They instead will normally measure only the average power of a signal over time (about 1 second). The signal itself may have peaks that are 10 times or more higher in amplitude than this average power over time, but these are not uniform, nor are they predictable.
Backplane
A common connection point for multiple components, circuits, or systems.
Balanced amplifier
A push-pull power amplifier.
Ballast resistor
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