Solved This is a positive-edge-triggered master-slave D | Chegg.com
sec 10 06 to 07 Master--Slave and Edge-Triggered J-K Flip-Flop - YouTube
flipflop - Explanation of Edge Triggered D type flip flop triggered at positive edge of the clock pulse cycle (from Morris Mano Book)? - Electrical Engineering Stack Exchange
Is S R flip flop positive level triggered or negative level triggered? - Quora
Master Slave D Flip Flop – Positive or Negative Edge Triggered? | allthingsvlsi