Automatic Abstraction of Combinational Logic Circuit from Scanned Document Page Images

2019 ◽  
Vol 29 (2) ◽  
pp. 212-223
Author(s):  
Ramanath Datta ◽  
Sekhar Mandal ◽  
Samit Biswas
Keyword(s):  
Logic Circuit ◽  
Combinational Logic ◽  
Automatic Abstraction ◽  
Combinational Logic Circuit ◽  
Document Page

scholarly journals Design of Combinational Logic Circuit Prober

2019 ◽  
Vol 24 (4) ◽  
pp. 317-325
Author(s):  
Mohanad Abdulhamid ◽  
Okoth Masimba
Keyword(s):  
Logic Circuit ◽  
Truth Table ◽  
The Other ◽  
Combinational Logic ◽  
Oscilloscope Screen ◽  
Sinusoidal Signals ◽  
Combinational Logic Circuit ◽  
Truth Tables

Abstract The objective of this paper is to design and implement a logic circuit prober to display truth tables of a three input combinational logic circuit. The truth table is to be as “1” and “0” on an ordinary 60 MHz oscilloscope. This paper meets this objective by using Lissajous Patterns to plot a “0” or a “1” on the oscilloscope screen. To plot a “0” on the oscilloscope screen, two sinusoidal signals in quadrature are supplied to the two inputs of the oscilloscope with the scope set to X-Y mode. To plot a “1” on the oscilloscope, only the signal to the Y input is allowed to reach the oscilloscope screen. To display all the 32 patterns required to obtain a three input truth table, two staircase waveforms are employed. The staircase waveforms, one eight-step and the other four-step, are added to the two sinusoidal signals to shift the patterns along the X and Y directions to produce all the 32 patterns.

Sign in / Sign up

Export Citation Format

Share Document