Digital attenuator system and electronic device

Abstract

The application provides a digital attenuator system and electronic equipment, comprising: a digital attenuator, a synchronous refresh logic circuit and a serial peripheral interface circuit; the serial peripheral interface circuit is used for obtaining a serial peripheral interface instruction sent by a host controller, and converting the serial peripheral interface instruction into a plurality of parallel control codes; the serial peripheral interface circuit is also used for generating a synchronization signal; the synchronous refresh logic circuit is used for performing latch processing on the plurality of control codes, and outputting the plurality of control codes subjected to the latch processing based on the synchronization signal; and the digital attenuator is used for outputting an attenuation value based on the plurality of control codes. An intelligent synchronous, refresh, delay and filter cooperative control mechanism is introduced, a traditional extensive mode of "digital control signal directly driving a switch" is innovated, and "spur-free management" from a digital control port to a radio frequency switch node is realized.

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