EMC for ICs > Main concepts |

# Origin of Susceptibility

## Multiple electromagnetic noise sources

This slide illustrate the emission power of several electronic devices. Several device exist in the range 1-5 GHz such as DECT digital phones (10mW power), mobile phones (1W), GSM base stations (100W), microwave (1KW), TV emits (10KW). Sources over 1MW are antennas for satellite link, military and weather radar. The frequency band 3-30MHz is called High frequency, 30-300MHz Very High Frequency, 300MHz-3GHz Ultra-High Frequency, 3GHz-30GHz Super High Frequency, 30-300GHz extremely High Frequency, and 300GHz-3THz (Tera-Hertz) Tremendously High Frequency.

### More complex designs, more power on chip

The global trend is the design of more complex integrated circuits, which require more and more power. Not all macro-blocks have the same electromagnetic behavior. High frequency high energy blocks are the most common sources of parasitic emission. The microprocessor units (MCU), digital signal processus (DSP) and RF parts are main contributors. The most susceptible blocks are the analog-to-digital (ADC) and digital-to-analog (DAC) converters, as well as memories.