CHAPTER 4 COUNTER 1 TYPES OF COUNTER Asynchronous

TYPES OF COUNTER Asynchronous counter Synchronous counter Asynchronous counter : - for these counter

ASYNCHRONOUS COUNTER Counter means count no of clock pulses which counter has received. Up

ASYNCHRONOUS COUNTER 2 -bit Asynchronous counter Up counter (Ripple Counter)

2 -BIT ASYNCHRONOUS COUNTER UP COUNTER (RIPPLE COUNTER)

3 -BIT ASYNCHRONOUS COUNTER UP COUNTER (RIPPLE COUNTER)

4 -BIT ASYNCHRONOUS COUNTER UP COUNTER (RIPPLE COUNTER)

STATE DIAGRAM The state diagram represents the states of a counter graphically.

MODULUS COUNTER The 2 bit counter is called as MOD-4 counter The 3 bit

MOD -3 ASYNCHRONOUS COUNTER USING 2 - BIT RIPPLE COUNTER

MODULO-5 RIPPLE COUNTER USING A 3 -BIT RIPPLE COUNTER

MOD-7 ASYNCHRONOUS COUNTER UP COUNTING USING T FLIP-FLOP

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CHAPTER 4 COUNTER 1

TYPES OF COUNTER Asynchronous counter Synchronous counter Asynchronous counter : - for these counter the external clock signal is applied to one flip-flop & then the o/p of preceding flip-flop connected to clock of next flip-flop. Synchronous counter : - for these counter all the flipflop receive the external clock pulse simultaneously.

ASYNCHRONOUS COUNTER Counter means count no of clock pulses which counter has received. Up counter count up counting i. e. 0 to 3 etc. No. of state depends on 2 n n is no of f/fs The maximum count is (2 n -1)

ASYNCHRONOUS COUNTER 2 -bit Asynchronous counter Up counter (Ripple Counter)

2 -BIT ASYNCHRONOUS COUNTER UP COUNTER (RIPPLE COUNTER)

3 -BIT ASYNCHRONOUS COUNTER UP COUNTER (RIPPLE COUNTER)

4 -BIT ASYNCHRONOUS COUNTER UP COUNTER (RIPPLE COUNTER)

STATE DIAGRAM The state diagram represents the states of a counter graphically.

MODULUS COUNTER The 2 bit counter is called as MOD-4 counter The 3 bit counter is called as MOD-8 counter MOD number = 2 n Modulus means no. of states through which the counter progress during ts operations.

MOD -3 ASYNCHRONOUS COUNTER USING 2 - BIT RIPPLE COUNTER

MODULO-5 RIPPLE COUNTER USING A 3 -BIT RIPPLE COUNTER

MODULO-5 RIPPLE COUNTER

MOD-6 ASYNCHRONOUS COUNTER

MOD-7 ASYNCHRONOUS COUNTER UP COUNTING USING T FLIP-FLOP

MOD-7 ASYNCHRONOUS COUNTER UP COUNTING USING T FLIP-FLOP

MOD-12 ASYNCHRONOUS COUNTER

MOD-11 ASYNCHRONOUS COUNTER

MOD-4 ASYNCHRONOUS COUNTER