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RF Building Blocks for the Next-Gen Wireless Systems
Published in Krzysztof Iniewski, Wireless Technologies, 2017
If the bias current of the PA is also controlled dynamically, then nearly optimal conditions can be maintained over the entire output power level. To see this, consider that the load power is simply given by PL = (1/2)VL · IL. The DC power consumption is given by PDC = Iav · Vsup. Assuming large power gain, the efficiency approaches the drain efficiency η=VLIL2IavVsup=12VLVsupILIav=12λvλi
Electronic Circuits in Action
Published in Trevor Linsley, Electronic Servicing and Repairs, 2014
The feature of an amplifier which makes it important is that it can provide power gain and not just voltage gain. If we multiply the voltage gain by the current gain we obtain the power gain: voltage gain=AP=output powerinput power=AV×A1
Systems
Published in W. Bolton, Higher Engineering Science, 2012
Amplification is ideally the process of increasing in size or amplitude a signal without changing its waveform. We can consider the voltage gain, current gain or power gain. The voltage gain is the ratio of the input to output voltage, the current gain is the ratio of the input to output current and the power gain is the ratio of the input to output power.
Fusion Gain and Triple Product for the Sheared-Flow-Stabilized Z Pinch
Published in Fusion Science and Technology, 2023
U. Shumlak, E. T. Meier, B. J. Levitt
Conventional power gain in electronic or microwave circuits, for example, is defined as the ratio of output power to input power,[19] even when considering components or subcircuits, e.g., amplifiers. Unity gain indicates an electronic circuit with an output power equal to the input power. This power gain contrasts with the definition of fusion gain given by Eq. (3), which subtracts the input power from the output power in the numerator. The input power that leaves the plasma volume is expected to be recaptured. Radiative power would be absorbed by the surrounding blanket of working fluid in a power reactor. Similarly, the power associated with thermal energy and kinetic energy leaves the plasma volume and may also be recovered by heating the blanket or be extracted as kinetic energy for direct energy conversion or space propulsion applications. A scientific power gain for a fusion core that aligns with the definition of conventional power gain could be expressed as