Transparent flip flop is also known as D flip flop.

Explanation:
- A flip flop is a sequential logic circuit that can store one bit of data.
- It is called a "flip flop" because it has the ability to flip between two stable states.
- There are different types of flip flops, such as J-K flip flop, S-R flip flop, T flip flop, and D flip flop.
- The transparent flip flop is another name for the D flip flop.

D flip flop:
- The D flip flop is a type of flip flop that has a single data input (D) and two outputs (Q and Q̅).
- The Q output represents the current state of the flip flop, while the Q̅ output represents the complement of the Q output.
- The D flip flop is called transparent because the input D is directly transferred to the output Q when the clock pulse is high.
- In other words, the output Q follows the input D whenever the clock pulse is high.
- When the clock pulse is low, the output Q remains in its previous state, regardless of the input D.
- This behavior makes the D flip flop ideal for applications where the output should only change when the clock pulse is high.
- The D flip flop is commonly used in digital systems for storing and transferring data.

Other flip flops:
- J-K flip flop: It has two inputs (J and K) and two outputs (Q and Q̅). It has additional functionality compared to the D flip flop, as it can be used to implement other flip flop types.
- S-R flip flop: It has two inputs (S and R) and two outputs (Q and Q̅). It has a more complex behavior compared to the D flip flop.
- T flip flop: It has a single input (T) and two outputs (Q and Q̅). It toggles its output whenever the clock pulse is high and the input T is high.
- These flip flops have different characteristics and are used in various applications depending on the requirements of the digital system.

In conclusion, the transparent flip flop is also known as the D flip flop. It has a single data input and follows the input when the clock pulse is high.