4. A common-source amplifier is based by R₁ and R₂ as shown below. Assume VTHN= |VTHP|= 0.6V, AN=Ap= 0.05 V-¹, and unCox=200 μA/V² and UpCox= 100 μA/V² (a) Assume Ibias = 0.1 mA. Determine R₁ and R₂ to set Vx as 1 V. Also, determine the drain current ID. Neglect channel-length modulation in the calculation. (b) Based on the obtained In in (a). Design Rp to achieve the maximum allow gain of this amplifier. Also, determine the small-signal gain vout/Vin under this condition. (c) If RD is replaced by a PMOS (W/L= 400) as an active load (biased in the saturation region), plot the small-signal model and determine the small-signal gain of the amplifier. Assume ID is kept the same as in (a). How about if the PMOS is replaced by an idea current source of ID? Determine the small-signal gain under this condition.
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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