A system on chip (SoC) integrates all components of an electronic system into a single microchip. It contains both digital and analog components, such as processors, memory, input/output logic, and analog-to-digital converters. A SoC for a sound-detecting device may include an audio receiver, ADC, microprocessor, memory, and I/O logic. Cell phone chips are also examples of SoCs, integrating components like GPS, graphics processors, and radio transmitters/receivers. Designing SoCs requires strategies for architecture, testing, validation, synthesis, and integration of components.