Synchronous Counter and the 4-bit Synchronous Counter
Synchronous counter
Lessons In Electric Circuits -- Volume IV (Digital) - Chapter 11
JK Flip Flop - Basic Online Digital Electronics Course
Counters | CircuitVerse
How to design a 3-bit binary counter using a T flip-flop - Quora
How to design a synchronous counter 4 bit using JK flip flop that can count up even numbers from 0 to 14, and count down odd numbers from 15 to 0 in 1 system - Quora
Asynchronous Counter
4 bits Synchronous Counter with J K Flip Flop - YouSpice
Design a 4-bit down counter (decrement by 1) and analyze for the same metrics. Assume that no enable signal is used in this case. Assume the same delay characteristic equation and hold