Show how to connect 2 J-K flip-flops to make a 2-bit ripple counter. You can use either a positive edge or negative edge trigger version of the J-K, and you have both the Q and Q outputs available. (a) Demonstrate with a timing diagram that your counter counts up (0–3) and label the output bits from your counter accordingly. (b) Show hot to add a single 2-input NAND gate to change this to a modulo-3 counter – that is, the counter resets to zero when the output reaches 3, and continues counting. So the count sequence will then be 0, 1, 2, 0, 1, 2, ... Remember, the J-K flip-flop includes negative-true jam-type SET and RESET inputs.

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
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4. Show how to connect 2 J-K flip-flops to make a 2-bit ripple counter. You can use either a
positive edge or negative edge trigger version of the J-K, and you have both the Q and Q
outputs available.
(a) Demonstrate with a timing diagram that your counter counts up (0–3) and label the
output bits from your counter accordingly.
(b) Show hot to add a single 2-input NAND gate to change this to a modulo-3 counter –
that is, the counter resets to zero when the output reaches 3, and continues counting. So
the count sequence will then be 0, 1, 2, 0, 1, 2, ... Remember, the J-K flip-flop includes
negative-true jam-type SET and RESET inputs.
Transcribed Image Text:4. Show how to connect 2 J-K flip-flops to make a 2-bit ripple counter. You can use either a positive edge or negative edge trigger version of the J-K, and you have both the Q and Q outputs available. (a) Demonstrate with a timing diagram that your counter counts up (0–3) and label the output bits from your counter accordingly. (b) Show hot to add a single 2-input NAND gate to change this to a modulo-3 counter – that is, the counter resets to zero when the output reaches 3, and continues counting. So the count sequence will then be 0, 1, 2, 0, 1, 2, ... Remember, the J-K flip-flop includes negative-true jam-type SET and RESET inputs.
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