A 3 -stage ripple counter has Flip Flop with propagation delay of 25 nsec and pulse width of strobe input 10 nsec. Then the maximum operating frequency at which counter operates reliably is

1 Answer

Answer :

A 3 -stage ripple counter has Flip Flop with propagation delay of 25 nsec and pulse width of strobe input 10 nsec. Then the maximum operating frequency at which counter operates reliably is 12.67 MHz

Related questions

Description : An eight stage ripple counter uses a flip-flop with propagation delay of 75 nanoseconds. The pulse width of the strobe is 50ns. The frequency of the input signal which can be used for proper operation of the counter is approximately (A) 1 MHz. (B) 500 MHz. (C) 2 MHz. (D) 4 MHz.

Last Answer : Maximum time taken for all flip-flops to stabilize is 75ns x 8 + 50 = 650ns. Frequency of operation must be less than 1/650ns = 1.5 MHz.

Description : What is race around condition in JK flip flop and how it can be eliminated?

Last Answer : For the racing around to take place, it is necessary to have the enable input high along with J=K=1. As the enable input remains high for a long time in a JK latch, the problem of ... to zero. Hence the multiple toggling cannot take place. Thus the edge triggering avoids the race around condition.

Description : Define flip-flop.

Last Answer : Flip Flop: Flip-flop is a circuit which can be turned on and off with the same signal. It is like a single switch button when the first time you press it turns on and when second time you press ... flip-flop like SR flip-flop, D flip-flop, JK flip-flop, SR flip-flop, master-slave flip-flop etc.

Description : What is the propagation delay of a logic gate?

Last Answer : The application input pulse and the occurrence of resulting output pulse is called propagation delay of logic gate.

Description : What is the ripple voltage?

Last Answer : Ripple voltage is the small variations in Dc voltage that remain after filtering in a power supply.

Description : Each flip-flop in a 4-bit ripple counter introduces a maximum delay of 40 n sec. The maximum clock frequency is (a) 2.65 MHz (b) 6.25 MHz (c) 5.26 MHz (d) 6.52 MHz 

Last Answer : Each flip-flop in a 4-bit ripple counter introduces a maximum delay of 40 ns. The maximum clock frequency is 6.25MHz. nff  * Tdelay = 4*40 =160ns so, max. frequency = 1/ (200*10-9 ) = 6.25MHz          

Description : What is modulus of counter? Show the method to determine the no. of flip flops for a mod-52 counter.

Last Answer : Modulus of a counter is the no. of different states through which the counter progress during its operation. It indicates the no. of states in the counter; pulses to be counted are applied to counter. The ... to its starting state after counting N pluses in the case of modulus N counter.

Description : Define PIV, TUF, ripple factor, efficiency of rectifier.

Last Answer : PIV: Peak Inverse Voltage (PIV) is defined as the maximum negative voltage which appears across non-conducting reverse biased diode. TUF : Transformer Utilization Factor (TUF) is defined as the ratio of DC output ... Efficiency of rectifier: η = DC output power/ AC input power = PLdc / Pac

Description : Define ripple factor and PIV of HWR

Last Answer : Peak Inverse Voltage (PIV) or Peak Reverse Voltage (PRV) refer to the maximum voltage a diode can withstand in the reverse-biased direction before breakdown. Also may be called Reverse Breakdown Voltage.

Description : Define ripple factor and PIV of diode.

Last Answer : 1. Ripple factor: It is define as ratio of R.M.S. value of AC component to the DC component in the output.  2. PIV : It is maximum reverse voltage that diode can withstand without destroying junction.

Description : In a half-wave rectifier, if an a.c supply is 60 Hz. Then what is the a.c ripple at output? (A) 30 Hz (B) 60 Hz (C) 20 Hz (D) 15 Hz

Last Answer : In a half-wave rectifier, if an a.c supply is 60 Hz. Then what is the a.c ripple at output? (A) 30 Hz (B) 60 Hz (C) 20 Hz (D) 15 Hz

Description : Explain ionospheric propagation with neat sketch. Explain two properties of layers of ionosphere.

Last Answer : Diagram :   Explanation: The transmitted signal travels into the upper atmosphere where it is reflected back to earth due to the presence of layers called as ionosphere in the upper ... having highest electron density of all layers, due to this F2 layer remains present at night time.

Description : How to Delay Your Period

Last Answer : How to Delay Your Period Do you have a vacation or a special occasion where you wish you didn't have to deal with your period? Believe or not, there are some things that you can do to help delay your ... ensure you that you won't have a menstrual period at all. This step isn't for everyone, though.

Last Answer : The delay fuses are used for the protection of motors.

Description : Flip camcorder NTSC/PAL?

Last Answer : Mine works just fine, as most computers can deal with both video outputs. You should be okay. :) Great camera, by the way.

Description : Anybody own a Flip Mino? I have a question.

Last Answer : the previous gen Flip has a big red LED that encicles the lens…it’s fricken’ annoying! Sorry but haven’t seen the Mino in person, but maybe Cnet.com has a video review of it in action? I’ll check and get back to you.

Description : How To Make Flip Flops From A Yoga Mat

Last Answer : So you were into yoga, but stopped. Now your yoga mat is just gathering dust in the corner and taking up space. So what do you do? Why, make flip flops out of them of course! Materials Needed ... flops, you don't have to meditate about how to replace your old, worn-out pair of flip-flops anymore.

Description : How to Forward Flip

Last Answer : How to Forward Flip Gymnasts use various flips and jumps during competitions, and one of the most common jump stunts they perform is the forward flip or the front flip. When you look at it, it ... properly and safely. Just follow these tips and keep practicing, and soon you'll master this move!

Description : What Is Program Counter?

Last Answer : Answer :Program counter holds the address of either the first byte of the next instruction to be fetched for execution or the address of the next byte of a multi byte instruction, which has ... one as the instruction bytes get fetched. Also Program register keeps the address of the next instruction.

Description : How To Make Stitch Counter Bracelets

Last Answer : How To Make Stitch Counter Bracelets Introduction Today, many women feel that their outfits are incomplete unless they also wear an eye-catching bracelet. Bracelets remain one of the most popular ... For stitching projects that have additional rows, simply reset the bracelet and start counting anew.

Description : Compare synchronous and asynchronous counter.

Last Answer : Asynchronous Counter Synchronous Counter In an Asynchronous Counter the output of one Flip Flop acts as the clock Input of the next Flip Flop. In a Synchronous Counter all the Flip Flop's are ... Also called as serial counter Also called as Parallel Counter

Description : A switch tail ring counter is made by using a single D-FF. The resulting circuit is (A) T-FF (B) D-FF (C) SR-FF (D) JK-FF

Last Answer : A switch tail ring counter is made by using a single D-FF. The resulting circuit is T-FF

Description : The counter e.m.f. of a d.c. motor?

Last Answer : The counter e.m.f. of a d.c. motor helps in energy conversion.

Description : What is the difference between a counter and a timer?

Last Answer : Counter counts only when the trigger is applied and timer counts continuously with some equal delay.

Description : Electronic Counter

Last Answer : Electronic Counter Electronic counter counts the number of pulses in a given time. Electronic counter is made from cascade flip-flops. It is use to store or display counting. Some counter is use ... BCD counter counts from 0000 (0) to 1001 (9). Johnson counter is the twisted ring counter.

Description : A 4-bit synchronous counter uses flip-flops with propagation delay times of 15 ns each. The maximum possible time required for change of state will be (A) 15 ns. (B) 30 ns. (C) 45 ns. (D) 60 ns.

Last Answer : Ans: A 15 ns because in synchronous counter all the flip-flops change state at the same time.

Description : Why did it take them FOUR HOURS to issue the Amber Alert?

Last Answer : You would need to ask those directly involved.

Description : What are you waiting for? II: Is there some prerequisite (real or imaginary) or obstacle in your life standing between you and something you want?

Last Answer : Just myself.

Description : The circuit shown in the illustration functions as a ____________. EL-0087 A. pulse trigger circuit for an operational amplifier B. three stage, high gain class 'A' amplifier C. binary ripple counter or shift register D. free running multivibrator

Last Answer : Answer: C

Description : For JK flip flop with J=1, K=0, the output after clock pulse will be (A) 0. (B) 1. (C) high impedance. (D) no change.

Last Answer : (B) 1.

Description : In a positive edge triggered JK flip-flop, J = 1, K = 0 and clock pulse is rising, Q will be (a) 0 (b) 1 (c) showing no change (d) toggle 

Last Answer : In a positive edge triggered JK flip-flop, J =1, K= 0 and clock pulse is rising, a Q will be 1

Description : The device which changes from serial data to parallel data is (A) COUNTER (B) MULTIPLEXER (C) DEMULTIPLEXER (D) FLIP-FLOP

Last Answer : Ans: C The device which changes from serial data to parallel data is demultiplexer. (A demultiplexer takes in data from one line and directs it to any of its N outputs depending on the status of the select inputs.)

Description : The bits are shifted and the first flip-flop receives its binary information from the____ a. Serial output b. Serial input c. Both d. None

Last Answer : b. Serial input

Description : In a JK flip-flop, for what input next state is complement of the present state (A)J=0,K=0 (B)J=1,K=0 (C)J=0,K=1 (D)J=1,K=1

Last Answer : In a JK flip-flop, for what input next state is complement of the present state (A)J=0,K=0 (B)J=1,K=0 (C)J=0,K=1 (D)J=1,K=1

Description :  A J -K flip-flop with J= 1 and K= 1 has a 20 kHz clock input. The Q output is : (A) Constant and low (B) Constant and high (C) A square wave with 20 kHz frequency (D) A square wave with 10 kHz frequency

Last Answer : a

Description : In an unclocked R-S flip flop made of NOR gates, the forbidden input condition is:  (1) R=0, S=0 (2) R=1, S=0 (3) R=0, S=1 (4) R=1, S=1

Last Answer : In an unclocked R-S flip flop made of NOR gates, the forbidden input condition is: R=1, S=1

Description : In single pulse modulation of PWM inverters, third harmonic can be eliminated if pulse width is equal to   (a) 30o (b) 60o (c) 120o (d) 150o

Last Answer : In single pulse modulation of PWM inverters, third harmonic can be eliminated if pulse width is equal to 120o

Description : In 8096, CCB bit 3 is ____. a) write strobe mode select b) address valid strobe select c) bus width select d) Internal read control mode

Last Answer : c) bus width select

Description : In 8096, CCB bit 3 is ____. a) write strobe mode select b) address valid strobe select c) bus width select d) Internal read control mode

Last Answer : b) address valid strobe select

Description : The frequency of the clock signal applied to the rising edge triggered D flip-flop shown in figure is 10 KHZ. The frequency of the signal at Q is A) 10 KHz B) 2.5 KHz C) 20 KHz D) 5 KHz

Last Answer : The frequency of the clock signal applied to the rising edge triggered D flip-flop shown in figure is 10 KHZ. The frequency of the signal at Q is 5 KHz

Description : The phase constant of a wave propagation with frequency of 35 radian/sec and time delay of 7.5 sec is a) 4.66 b) 262.5 c) 46.6 d) 26.25

Last Answer : b) 262.5

Description : Which of the following statements on DRAM are correct? i) Page mode read operation is faster than RAS read. ii) RAS input remains active during column address strobe. iii) The row and column addresses are strobed into the ... RAS and CAS inputs respectively. a) i & iii b) i & ii c) all d) iii

Last Answer : d) iii

Description : A single phase fully controlled bridge converter supplies a load drawing constant and ripple free load current, if the triggering angle is 30o, the input power factor will be  (A) 0.65 (B) 0.78 (C) 0.85 (D) 0.866

Last Answer : A single phase fully controlled bridge converter supplies a load drawing constant and ripple free load current, if the triggering angle is 30o, the input power factor will be 0.78

Description : In dc choppers per unit ripple is maximum when duty cycle is   (a) 0.2 (b) 0.5 (c) 0.7 (d) 0.9

Last Answer : In dc choppers per unit ripple is maximum when duty cycle is 0.5 

Description : I had a great uncle who said a 'flip-flop' was an old slang word for a radio. Has anyone else ever heard this?

Last Answer : I never heard of that. I’m 67.

Description : When I look at her, my heart does a flip-flop. Why?

Last Answer : JP Must be a case of puppy love. You made me stop and look at the picture of my two goldens that I keep on my desk. I lost them a few years ago. Enjoy every minute of your time with her.

Description : Is the flip flop sandals on guys a fad or is it here to stay?

Last Answer : They are here to stay. I don't wear them because I'm desperate to fit in. I wear them because I like air on my feet. I'm also used to colder temperatures, so it's not a big deal to wear them ... better because there is colder air on my feet and they are easy to slip on if I have to run out quickly.

Description : What is SR flip-flop ?

Last Answer : SR Flip-flop is the simplest flip flop. The full form of SR is - Set Reset . In SR flip-flop, setting the output state to 1 or HIGH is called SET and 0 or LOW is called RESET . SR flip- ... formed by connecting two NAND gates or NOR gates and connecting the input of one to the output of the other .

Description : How many flip flop are required to store the binary value of 1101?

Last Answer : What is the answer ?

Description : 15 things you never knew about tarek and christina from flip or flop?

Last Answer : Answer written by Urbo.com in March 21 2016It all started as an office romance.Tarek and Christina met at a real estate office. "We started our relationship working together," Christina said. Was it ... Scott's "Brother vs. Brother." What impromptu HGTV appearances are in store for them this year?