Figure 1 shows a simple copy machine, a stop signal, S, is to be generated to stop the machine operation and energize an indicator light whenever either of the following conditions exist: (1) there is no paper in the paper feeder tray or (2) the two microswitches in the paper path are activated, indicating a jam in the paper path. The presence of paper in the feeder tray is indicating by a HIGH at logic signal P. Each of the microswitches produces a logic signal (Q and R) that goes HIGH whenever paper is passing over the switch to activate it. (i) Determine the truth table for the copy machine for the input are P, Q and R and the output is S. (iii) From (a)(i), minimize SOP expression using Karnaugh map simplification. (iv) Draw a minimized logic circuit based on the simplification obtained in (a)(iii).

Figure 1 shows a simple copy machine, a stop signal, S, is to be generated to stop the machine operation and energize an indicator light whenever either of the following conditions exist: (1) there is no paper in the paper feeder tray or (2) the two microswitches in the paper path are activated, indicating a jam in the paper path. The presence of paper in the feeder tray is indicating by a HIGH at logic signal P. Each of the microswitches produces a logic signal (Q and R) that goes HIGH whenever paper is passing over the switch to activate it. (i) Determine the truth table for the copy machine for the input are P, Q and R and the output is S. (iii) From (a)(i), minimize SOP expression using Karnaugh map simplification. (iv) Draw a minimized logic circuit based on the simplification obtained in (a)(iii).

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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In a simple copy machine, a stop signal, S, is to be generated to stop the machine operation and energize an indicator light whenever either of the following conditions exists: (1) there is no paper in the paper feeder tray; or (2) the two micro-switches in the paper path are activated, indicating a jam in the paper path. The presence of paper in the feeder tray is indicated by a HIGH at logic signal P. Each of the micro-switches produces a logic signal (Q and R) that goes HIGH whenever paper is passing over the switch to activate it. Design and build the logic circuit to produce a HIGH at output signal S for the stated conditions, and implement it using the two-input NAND chip.
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