Discussion: counter categories | Electronic Engineering homework help

 Shift register counters are shift registers with feedback that exhibit  special sequences. Examples are the Johnson counter and the ring  counter. The Johnson counter has 2n states in its sequence, where n is  the number of stages. The ring counter has n states in its sequence. 

answer the following:

1. Discuss the differences between the two main categories of counters:
    
2. Do some research and list your references – then discuss the concept  of ““Metastability”” as it relates to digital counters. Which category  of counter (Synchronous or Asynchronous) is more susceptible to  Metastability?