Among the logic families, the family which can be used at very high frequency greater than 100 MHz in a 4 bit synchronous counter is__________________?

Related Mcqs:

1. Positive logic in a logic circuit is one in which______________?

   A. logic 0 and 1 are represented by 0 and positive voltage respectively
   B. logic 0 and, -1 are represented by negative and positive voltages respectively
   C. logic 0 voltage level is higher than logic 1 voltage level
   D. logic 0 voltage level is lower than logic 1 voltage level

2. What would happen, if smaller logic modules are utilized for performing logical functions associated with FPGA? A. Propagation delay will increase B. FPGA area will increase C. Wastage of logic modules will not be prevented D. Number of interconnected paths in device will decrease ?

   A. A & B
   B. C & D
   C. A & D
   D. B & C

3. ________________ frequency is not common in low frequency traction system?

   A. 40 Hz
   B. 25 Hz
   C. 16 Hz
   D. non of these

4. A NAND gate is called a universal logic element because______________?

   A. it is used by everybody
   B. any logic function can be realized by NAND gates alone
   C. all the minization techniques are applicable for optimum NAND gate realization
   D. many digital computers use NAND gates

5. An RC high-pass filter consists of a 0.2 µF capacitor and a 220 Ω resistor. The output is taken across the resistor. The circuit’s critical frequency is_____________?

   A. 723 Hz
   B. 7,234 Hz
   C. 362 Hz
   D. 3,617 Hz

6. The same signal in Problem 2 is applied to an RC high-pass filter. If the reactance is zero at the input frequency, the output voltage is____________?

   A. 12.73 V peak-to-peak
   B. 18 V peak-to-peak
   C. 9 V peak-to-peak
   D. zero

7. An RC high-pass filter consists of an 820 Ω resistor. What is the value of C so that Xc is ten times less than Rat an input frequency of 12 kHz?

   A. 81 µF
   B. 161 µF
   C. 0.161 µF
   D. 220 µF

8. An RL high-pass filter consists of a 470 Ω resistor and a 600 mH coil. The output is taken across the coil. The circuit’s critical frequency is___________?

   A. 125 Hz
   B. 1,250 Hz
   C. 564 Hz
   D. 5,644 Hz

9. When the load is above _______________ a synchronous motor is found to be more economical?

   A. 2 kW
   B. 20 kW
   C. 50 kW
   D. 100 kW

10. Besides a constant speed a synchronous rotor possesses which of the following advantages ?

    A. Lower cost
    B. Better efficiency
    C. High power factor
    D. All of the above