Control Systems: Transfer Function of a Closed Loop and Open Loop Systems Topics discussed: 1. The transfer function of an open loop system. 2. Closed loop system. 3. Types of feedback in a closed loop system. 4. Closed loop transfer function of a closed loop system with negative feedback. 5. The concept of open loop transfer function. 6. Relation between CLTF and OLTF. 7. Application of CLTF and OLTF in various concepts of control systems.