Analog signals are continuous in both time and value. Analog signals are used in many systems, although the use of analog signals has declined with the advent of cheap digital signals. Digital signals are sampled, quantized & encoded version of continuous time signals which they represent.
Causes of Tingling in the Hands and Feet. Diabetes is one of the most common causes of peripheral neuropathy, accounting for about 30% of cases. In diabetic neuropathy, tingling and other symptoms often first develop in both feet and go up the legs, followed by tingling and other symptoms that affect both hands and go up the arms. About two-thirds of people with diabetes have mild to severe forms of nerve damage.
Diabetes is one of the most common diseases currently, and is produced when blood sugar levels increase. Tingling is a typical symptom of this disease, as it can cause insufficient blood flow that later could make the individual feel this annoying tingling sensation in their legs and feet. This symptom could indicate ulcers, which should be treated in time to prevent the formation of gangrene.