The original signal is a 20MHZ sine wave, and now it needs to be multiplied to get a 40MHZ sine wave. Can I use NE602 to multiply the 20MHZ sine wave to get a 40MHZ sine wave? What are the related cir...
I am working on SD card read/write driver on s3c2440. There is no file system, so I read and write one block at a time. How can I detect bad blocks and mark them? SD card does not have its own detecti...