A capacitor placed across the base and collector of a transistor can introduce feedback that affects the transistor's response time. Specifically, adding a capacitor, such as a 1uF, slows down the transistor's switching speed due to the feedback of high frequencies from the collector to the base. This phenomenon can be analyzed using the concept of Miller capacitance, which describes how the capacitor influences the effective input capacitance seen by the base. Understanding this effect is crucial for circuit design, particularly in applications involving high-frequency signals. Further references on this topic can be found in texts on analog devices, such as those by Gaussi.
