Design, Analysis And Testing Of Direct-Coupled Multistage BJT Amplifiers Used In Implementation Of Multistage Amplifiers

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A) Design a multi-stage amplifier to the following specifications:

AV = -250 ( 5%) – No Load

RIN > 10 K

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RO < 50 

fLOW < 50 Hz

fHIGH > 150 KHz

Must support an undistorted 2.5V(p-p) sinewave output into a 1Megohm RLoad (10mvp-p

nominal input)

Must support an undistorted 2.0V(p-p) sinewave output into a 100ohm RLoad (Input may be

adjusted up or down as necessary to demonstrate this)

CALIFORNIA STATE POLYTECHNIC UNIVERITY, POMONA Electrical and Computer Engineering Department

ECE 3200 Lab Experiment #12

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Multi-Stage Amplifier Design Objective: The objectives of this experiment are to design, construct, and test a multi-stage amplifier. Pre-Lab: A) Design a multi-stage amplifier to the following specifications:

AV = -250 ( 5%) – No Load RIN > 10 K RO < 50  fLOW < 50 Hz fHIGH > 150 KHz Must support an undistorted 2.5V(p-p) sinewave output into a 1Megohm RLoad (10mvp-p

nominal input) Must support an undistorted 2.0V(p-p) sinewave output into a 100ohm RLoad (Input may be

adjusted up or down as necessary to demonstrate this) B) Each student shall design, construct, and test his/her own circuit. This experiment is to test

each individual’s design capability. C) Turn in a copy of the schematic portion of your prelab with the entire circuit design. Be

prepared to show performance calculations to the instructor prior to the start of the lab. Keep a copy of the schematic for yourself.

* Lab time will limited, you will want to breadboard the circuit prior to the lab session. Instructor’s recommendation is not to use a direct & shared-bias cascade scheme – recall the challenges in maintaining correct biasing from Week #3. List of Parts: As necessary to meet the performance specifications. Procedure: Test your amplifier circuit and read and record all the necessary data to verify that it performs to the design specifications. Demonstrate your results to the instructor. For the 100ohm loaded output, read and record the output voltage your circuit can support just at the onset of clipping. Data Analysis: Perform an error analysis comparing/contrasting the calculated values from your pre-lab to the measured values from the experiment.

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