Final answer:
DRAM chips are used as main system memory, cheaper but slower, and need frequent refreshing. SRAM chips are faster and used in CPU cache memory, more expensive and do not need to be refreshed. The choice of DRAM or SRAM depends on device requirements such as power, speed, and storage capacity.
Step-by-step explanation:
DRAM (Dynamic Random Access Memory) chips and SRAM (Static Random Access Memory) chips are two types of memory used in computers and other devices. DRAM is commonly used as the main memory in computers because it is cost-effective and can store a lot of data. However, it is slower and needs to be refreshed thousands of times per second. SRAM, on the other hand, is faster and does not need to be refreshed, which makes it more expensive. It's used in cache memories, closer to the CPU for faster access to frequently used data.
The difference between DRAM and SRAM can be better understood through their design and use cases. DRAM chips store each bit of data in a separate capacitor within an integrated circuit, which can lose its charge over time and, therefore, requires periodic refreshing to maintain the stored information. SRAM chips store data in flip-flops, which does not need to be refreshed as they maintain their state as long as power is supplied. While DRAM is often used for system memory, SRAM is commonly implemented as CPU cache, which is critical for enhancing the processing speed of a computer.
Implementing these two types of memory depends on the device's requirements for power, speed, and storage capacity. For example, in digital cameras, a fast memory card with a high capacity is crucial for efficient storage and retrieval of high-resolution images.