Multi-stage Amplifier Circuit for High Dynamic Range Distance Measurement

The amplifier is divided into multiple stages with different gain levels. Each stage handles a specific portion of the dynamic range, allowing the system to detect both extremely small and large light amounts without requiring a single large dynamic range amplifier. This segmentation reduces the complexity of each individual amplifier stage while maintaining the overall large detection range capability.

The system dynamically switches between different amplifier stages based on the input signal level. The switching mechanism selects the appropriate gain stage according to the detected light amount, enabling adaptive detection across a wide dynamic range. This dynamic operation allows the circuit to maintain optimal performance for both small and large signals without requiring all stages to be active simultaneously, thus reducing circuit complexity.

Multiple amplifier stages with different gain levels are merged into a single integrated circuit structure. The patent combines several amplification stages, switching mechanisms, and control logic into one unified device, achieving large dynamic range detection without proportionally increasing the overall circuit scale. This merging approach allows efficient space utilization and reduces the physical footprint compared to separate discrete amplifier circuits.

The patent introduces a temporal dimension to the amplification process by using time-based switching between different amplifier stages. Instead of having all amplifiers operate simultaneously in parallel (spatial arrangement), the system sequentially activates different stages based on signal characteristics. This dimensional change from spatial to temporal organization reduces the required circuit scale while maintaining the capability to handle large dynamic ranges.