DES-2015-16_QP_02122015.docx

Apply 4 7 three identical voltage amplifiers with

This preview shows page 4 - 7 out of 13 pages.

Apply 4 7 Three identical voltage amplifiers with voltage gain 100 are connected in cascade. Then determine the overall voltage gain in dB. Apply 4 P a g e 4 | 13
Image of page 4

Subscribe to view the full document.

4 1 An amplifier is required to amplify the output signal from a transducer that produces a constant current of i s =1mA at an internal resistance Varying from R s =1.5kΩ to R s =10 kΩ. The desired output current is i o =0.5A at a load resistance varying from R L =10Ω to R L =120Ω. The variation in output current should be kept within ±3%. Determine the design specifications of the current amplifier. Design 5 2 An amplifier is used to record the short-circuit current of a transducer of unknown internal resistance; the recorder requires 10V for a reading of 1 cm. The recorder should read 10cm±2% for an input current of 1A. The input resistance of the recorder varies from R L =5kΩ to R L =20 kΩ. Determine the design specifications of the transimpedance amplifier. Design 5 3 An amplifier is required to give a transconductance gain of Z m =20mA ⁄ V ± 2%. The source resistance is R s =1kΩ, and the load resistance is R L =200Ω. Determine the design specifications of the amplifier. Design 5 4 An amplifier is required to amplify the output signal from a transducer that produces a voltage signal of v s =10mv with an internal resistance of R s =2.5kΩ. The load resistance R L =10kΩ. The desired output voltage is vo=5V. The amplifier must not draw more than1µA from the transducer. The variation in output voltage when the load is disconnected should less than 1%. Formulate the design specifications of the amplifier and calculate Design 5 5 An amplifier is required to amplify the output signal from a transducer that produces a constant current of i s =200µA at an internal resistance varying from R s =20 kΩ to 100 kΩ. The desired output current is i o =40 mA at a load resistance varying from R L =20Ω to 500Ω. The variation in output current should be kept within ±3%. Determine the design specifications of the amplifier. Design 5 6 An amplifier is required to amplify the output signal from a communication receiver that produces a voltage signal of v s =40mV with an internal resistance of R s =3kΩ. The load resistance is R L =20 kΩ. The desired output voltage is v o =20 V. The amplifier must not draw more than 2µA from the receiver. The variation in output voltage when the load is disconnected should be less than 1%. Determine the design specifications of the voltage amplifier. Design 5 7 An amplifier is used to measure a DC voltage signal v s =0 to 10V with a Design 5 P a g e 5 | 13
Image of page 5
source resistance of R s =2kΩ to 5kΩ. The output of the amplifier is a meter that gives a full-scale deflection at a current of i o =100 mA and whose resistance is R m =20Ω to 100Ω. Determine the design specifications of the amplifier.
Image of page 6

Subscribe to view the full document.

Image of page 7

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern