ASIC (Application Specific Integrated Circuit) system for realizing intermediate-frequency digital down-conversion

The invention provides an ASIC (Application Specific Integrated Circuit) system for realizing intermediate-frequency digital down conversion, which provides a solution for communication between a high-speed and high-precision ADC (Analog-to-Digital Converter) and a DSP (Digital Signal Processor). Comprising a numerical control oscillator, a frequency mixer, a gain adjuster, a CIC filter, a first FIR filter and a second FIR filter, so that digital down-conversion can be integrated into a special chip, and resource consumption is reduced; the digital controlled oscillator is realized by using the CORDIC algorithm, so that the flow line design of the structure is facilitated, the clock cycle of the system is reduced, the high-speed and high-precision effects are achieved under the condition that the data precision requirement is not influenced, and the digital controlled oscillator has the advantages of good time sequence and low power consumption. 本发明提供一种实现中频数字下变频的ASIC系统，为高速高精度模数转换器ADC与数字信号处理器DSP之间的通信提供解决方案；包括数