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Unformatted text preview: 1 ECE2280 Homework #2 Spring 2010 1. (a) Explain how an amplifier works in your own words. (b) Explain in your own words what R i is. (c) Explain in your own words what R o is. (d) Describe the ideal characteristics for an amplifier (i.e. ideal value for R i , R o , A vo ) (e) Describe the characteristics for a buffer amplifier . (f) Describe Gain-Bandwidth Product in your own words. 2. Use the circuit below to find the overall voltage gain v L /v s . 3. Design an amplifier that provides 0.5W of signal power to a 100 load resistance. The signal source provides a 30mV rms signal and has a resistance of 0.5M . Three types of voltage-amplifier stages are available: (a) A high-input resistance type with R i =1M , A vo =10, and R o =10k . (b) A high-gain type with R i =10k , A vo =100, and R o =1k . (c) A low-output-resistance type with R i =10k , A vo =1, and R o =20 . Design a suitable amplifier using a combination of these stages. Your design should utilize the minimum number of stages and should ensure that the signal level is not reduced below 10mV at any point in the...
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This note was uploaded on 01/24/2011 for the course ENGR 3700 taught by Professor Kal during the Spring '10 term at Utah State University.
- Spring '10