The book (or Analog and Digital Electronics ) by U.A. Bakshi A.P. Godse
The book is noted for its "lucid language" and systematic approach to complex topics. books.google.com DIGITAL ELECTRONICS - A Conceptual Approach eBook digital electronics by bakshi and godse pdf
In-depth analysis of flip-flops (SR, JK, D, T), shift registers, and synchronous/asynchronous counters. Memory Devices: The book (or Analog and Digital Electronics ) by U