1. Consider the following statements Impedance of Gunn diode is about tens of ohms.Impedance of Impatt diode is a few ohms.Impedance of Impatt diode are of the same order.Impedance of Impatt diode is more than that of Gunn diode. Which of the above statement are correct?





Write Comment

Type in
(Press Ctrl+g to toggle between English and the chosen language)

Comments

  • By: guest on 02 Jun 2017 01.04 am
    A Gunn diode uses GaAs which has a negative differential mobility, i.e., a decrease in carrier velocity with increase in electric field. This effects is called transferred electron effect. The impedance of a Gunn diode is tens of ohms. A Gunn diode oscillator has a resonant cavity, an arrangement to couple Gunn diode to cavity, biasing arrangement for Gunn diode and arrangement to couple RF power to load. Applications of Gunn diode oscillator include continuous wave radar, pulsed radar and microwave receivers. An Impatt diode has n+ - p - i - p + structure and is used with reverse bias. It exhibits negative resistance and operates on the principle of avalanche breakdown. Impatt diode circuits are classified as broadly tunable circuit, low Q circuit and high Q circuit. The impedance of Impatt diode is a few ohms. The word Impatt stands for Impact Avalanche Transit Time diode. The features of Impatt diode oscillator are : Frequency 1 to 300 GHz, Power output (0.5 W to 5 W for single diode circuit and upto 40 W for combination of several diodes), efficiency about 20%. Its applications include police radar systems, low power microwave transmitter etc.
Show Similar Question And Answers
QA->Which element forms over 30 solid allotropes, more than any other element ?....
QA->A few pages of this book are wanting എന്നതിന് ശരിയായ വിവർത്തനം ? ....
QA->pick out the correct tag question :....
QA->This is the Standing Order - മലയാളത്തിലേക്ക് വിവർത്തനം ചെയ്താൽ....
QA->ഫ്രാൻസിലെ Chevalier de L"Order et Lettres അർഹനായ സിനിമ അഭിനേതാവ് ?....
MCQ->Consider the following statements Impedance of Gunn diode is about tens of ohms.Impedance of Impatt diode is a few ohms.Impedance of Impatt diode are of the same order.Impedance of Impatt diode is more than that of Gunn diode. Which of the above statement are correct?....
MCQ->Consider the following statements Gunn diode can be used in combinational logic circuits.Gunn diode can be used in sequential logic circuits.Both Gunn diode and GaAs Mesfet can be used in logic circuits. Which of the above statements are correct?....
MCQ->Which of the following statements are correct? The switch statement is a control statement that handles multiple selections and enumerations by passing control to one of the case statements within its body. The goto statement passes control to the next iteration of the enclosing iteration statement in which it appears. Branching is performed using jump statements which cause an immediate transfer of the program control. A common use of continue is to transfer control to a specific switch-case label or the default label in a switch statement. The do statement executes a statement or a block of statements enclosed in {} repeatedly until a specified expression evaluates to false.....
MCQ->Read the following statements as regards register pairs in microprocessor 8085B represents B, C pair with B as high order register and C as low order register.D represents D, E pair with D as high order register and E as low order register.H represents H, L pair with H as high order register and L as low order register. Which of the above statements are correct?....
MCQ->How many students scored more than B in a class of 25 students? I. More than four but less than ten students scored more than that of B. B's rank is an odd number. Seventeen students scored less than D. B. The rank ofC Is 16th from the last. B got more marks than C. Only two students are there between B and C.....
Terms And Service:We do not guarantee the accuracy of available data ..We Provide Information On Public Data.. Please consult an expert before using this data for commercial or personal use
DMCA.com Protection Status Powered By:Omega Web Solutions
© 2002-2017 Omega Education PVT LTD...Privacy | Terms And Conditions