Two PNP transistors are connected to form a Darlington pair to create a single stage amplifier. Both transistors have the same B. Assume that is large such that 3+ 1 ≈ ß. Vcc 9m2 RL 2 9m2 RL 2+9m2 RL VIN PNP Darlington Pair Used as an Amplifier 1. If the Darlington pair is to be treated as a single transistor, what is the overall 3 if the "emitter current" is IOUT? овг ов 02,8² 028 9m2 R 1+9m2 RL RL 2. Calculate the approximate expression for A₂. Use 1 and gm1 for the parameters of Q1 while T2 and 9m2 for the parameters of Q2. Assume V₁ → ∞ for both transistors. 9m2 RL iOUT VOUT
Power Amplifier
The power amplifier is an electronic amplifier designed to maximize the signal strength of a given input. The input signal strength is enhanced to a high enough level to drive output devices such as speakers, headphones, RF (Radio frequency) transmitters, etc. Unlike voltage / current amplifiers, the power amplifier is designed to drive core loads directly and is used as a storage block in the amplifier series.
Maximum Efficiency Criterion
In every field of engineering, there is a tremendous use of the machine and all those machines are equipped for their popular work efficiency so it very much important for operation engineers to monitor the efficiency of the machine, planning engineers to check out the efficiency of the machine before installing the machine and design engineers to design machine for higher efficiency than and then the utility will procure their products that will ultimately lead to profit and loss of the company. It indicates the importance of efficiency right from the initial stage as manufacturing units, intermediate stage as planning coordinators, and end-users stage as a utility.
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