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FUNCTION OF COMBINATIONAL LOGIC.

FUNCTION OF COMBINATIONAL LOGIC. Decoders & Encoders. By: Fariza EL Sharif Norhan Abo Hani. BCD Excess 3. The Code conversion Procedure to Excess 3.

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FUNCTION OF COMBINATIONAL LOGIC.

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  1. FUNCTION OF COMBINATIONAL LOGIC. Decoders & Encoders By: Fariza EL Sharif Norhan Abo Hani

  2. BCD Excess 3 • The Code conversion Procedure to Excess 3 is a numeral system used on some older computers that uses a pre-specified number N as a biasing value. It is a way to represent values with a balanced number of positive and negative numbers.

  3. TRUTH TABLE: BCD Excess-3 The Truth Table of the BCD Excess-3:

  4. MAPS OF BCD TO EXCESS 3 BCD Excess-3

  5. BCD Excess-3 Logic symbol for a BCD Excess-3 : Fig. (1) BCD Excess-3

  6. WHAT IS DTMF ? • DTMFis a method of sending and receiving control information over a communications channel. • The reader is probably most familiar with DTMF tones as heard on a modern push-button telephone. Each digit on the keypad is encoded as a DTMF tone, which is then transmitted over a medium, and decoded at the receiving end. Dual tone multiple frequency signaling

  7. Application DTMF Fig. (2) application DTMF

  8. THE ELECTRICAL CIRCUITS

  9. APPLICATION DTMF Turth Table a 7-Segment Display

  10. Thanks 

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