6.15* A flip-flops has a 3 ns delay from the time the clock edgeoccurs to the time the output is complemented. What is the maximumdelay in a 10-bit binary ripple counter that uses these flip-flops? Whatis the maximum frequency at which the counter can operate reliably?

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Answered: 6.15* A flip-flops has a 3 ns delay…

Electric Motor Control

10th Edition

ISBN:9781133702818

Author:Herman

Publisher:Herman

Chapter22: Sequence Control

Section: Chapter Questions

Problem 6SQ: Draw a symbol for a solid-state logic element AND.

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6) For IC 7493, answer the following questions: a) What is the maximum count length of this counter? b) This is a (ripple, synchronous) counter. c) What must be the conditions of the reset inputs for the 7493 to count? d) This is a(an) (down, up) counter. e) The IC 7493 contains (number) flip-flops. f) What is the purpose of the NAND gate in the 7493 counter?
a) Design a single-digit decade counter that counts from 0 to 9 and repeats. The single-digit decade counter should be built by a cascaded synchronous binary counter (74LS163) and other basic logic gates. Simulate the complete counter circuit by OrCAD and PSPICE. Capture the circuit schematic and the simulated waveform. (Define the simulation timings for at least one full counting cycle from 0 to 9 and back to 0.) (Hint: Use the DigClock input from the SOURCE as shown below and setup the CLK ONTIME and OFFTIME accordingly for the clock source.) 1/6 Pat DigClock Part List OFFTIME = SuS DSTM1 ONTIME = DELAY= STARTVAL = 0 OPPVAL = 1 Sus EUK FleStim AC Lbrajes Design Cache b) Read the specification of 74LS47 (BCD-to-7-Segment Decoder shown in Appendix) to see how the logic IC operates to drive a 7-segment LED display. Draw the circuit connection of the decade counter in (a) and the decoder to display the count value on the 7-segment LED display. Further explain why common anode…
(c) For each of the following parts, fill in the respective row of the timing diagram shown in Figure 5. (i) Find the input for a rising-edge-triggered D flip-flop that would produce the output Q as shown in Figure 5. (ii) Find the input for a rising-edge-triggered T flip-flop that would produce the output Q as shown in Figure 5. Clock D Figure 5
9. Analysis of Synchronous Counters, in the following figure, write the logic equation for each input of each flip-flop. Determine the next state for state 010,011,100,111 as Q2Q1Q0 sequence. FF0 FFI FF2 Ko K, K2 CLK
(d) Figure 6 shows the diagram of a 3-bit ripple counter. Assume Qo = Q1 = Q2 = 0 at t = 0, and assume each flip-flop has a delay of 1 ns from the clock input to the Q output. Fill in Qo, Q1, and Q2 of the timing diagram (shown in Figure 7). Flip-flop Q1 will be triggered when Qo changes from 0 to 1. %3D 3 Qo Q2 T T Clock- Figure 6 Clock 10 15 20 25 30 35 40 45 50 Figure 7
d) Draw the schematics of 4-bit synchronous and asynchronous MOD-8 counters and comment on their pros and cons. e) Calculate the noise margin for a logic gate with the following logic levels: VIL = 1.1 V, VIH = 3.2 V, VOL = 0.6 V, VOH = 4.0 V.
a) Design a single-digit decade counter that counts from 0 to 9 and repeats. The single-digit decade counter should be built by a cascaded synchronous binary counter (74LS163) and other basic logic gates. Simulate thecomplete counter circuit by OrCAD and PSPICE. Capture the circuit schematic and the simulated waveform.(Define the simulation timings for at least one full counting cycle from 0 to 9 and back to 0.)(Hint: Use the DigClock input from the SOURCE as shown below and setup the CLK ONTIME and OFFTIME accordingly for the clock source.)
9 Using D flip-flops, (a) Design a counter with the following repeated binary sequence: 0, 1, 2, 4, 6. (b) Draw the logic diagram of the counter. (c) Design a counter with the following repeated binary sequence: 0, 2, 4, 6, 8. (d) Draw the logic diagram of the counter.
7. Draw a logic diagram for a 5-bit ring counter has an initial state 01011 and determine the waveform for each Q output during 5 clock pulses.
A counter circuit is shown in Figure Q4(b). Redesign this counter using two T flip-flops and logic gates. (b) QB ac D Flip-flop D Flip-flop D Flip-flop B CIK CIk CIK Clock Clear Clear Clear Clear Figure Q4(b) 10
Design a synchronous error-checking circuit that can identify the existence of the sequence 1010 in a serial flow of binary data using JK flip flop & any logic gates. Name the machine used in the design.
3- Design a counter with a control input. When the input is high, the counter should sequence through three states: 10, 01, 11 and repeat. When the input is low the counter should sequence through the same states in the opposite order 11, 01, 10 and repeat.a) Draw the state diagram and state transition table.b) Implement the counter using D flip-flops and gates.

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6.15* A flip-flops has a 3 ns delay from the time the clock edge occurs to the time the output is complemented. What is the maximum delay in a 10-bit binary ripple counter that uses these flip-flops? What is the maximum frequency at which the counter can operate reliably?