Consider the common-emitter amplifier shown below. Let = 5kn, RB = 10kn, CB 200pF, Rc 1kn, Cout = 5pF, 9m 10mS, and r, → ∞. Assume that the amplifier is biased such that it operates in the forward-active region and ignore the parasitic capacitances of the transistors. Derive the transfer function and answer the questions below. Vin RB CB Rc 。 Vout Cout 1. What is the DC gain of this amplifier? 2. Where is the input pole frequency located? The output pole frequency is located at 200 Mrad sec . 3. At what frequency is the gain equal to 0 dB? dB Mrad sec Mrad sec = =
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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The answer in (1) is not 20
The answer in (2) is not 0.5
The answer in (3) is not 4.74
The answer in (4) is not 1.5
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