What type of data transmission can occur over a digital circuit?

A digital circuit is primarily designed to transmit digital signals, which are represented as discrete values, typically in binary form (0s and 1s). However, the choice indicating that both digital and converted analog signals can occur over a digital circuit is accurate because digital circuits can handle signals that have been converted from analog to digital formats.

In practice, analog signals, such as those from microphones or sensors, can be processed by an analog-to-digital converter (ADC) to create a digital representation of the signal. This digital signal can then be transmitted over a digital circuit. Additionally, in some systems, digital signal processing techniques can also convert digital signals back into analog form, allowing for bi-directional communication.

Thus, the nature of digital circuits allows for flexibility in handling data transmission that encompasses not only pure digital signals but also those analog signals that have been appropriately converted. This characteristic is fundamental for systems that integrate both digital inputs and outputs while still needing to interface with the analog world, reflecting the hybrid nature of modern communication systems.