Amplitude phase precision adjustable attenuation phase shift architecture

Abstract

The invention, which belongs to the technical field of chip circuit design, discloses an amplitude-phase precision adjustable attenuation phase shift architecture comprising an active numerical control attenuator, an active numerical control phase shifter, and a table look-up code value register. According to the invention, under the background that an external system requires 6-bit attenuation and 6-bit phase shift, the direct attenuation bit number and the phase shift bit number are respectively increased to 9 bits, so that further improvement of the amplitude-phase precision becomes possible; in addition, based on the architecture, under the condition that the system complexity and the write-in data time of the power-on table look-up code value register are allowed, the 9-bit direct control bit can still be further increased; along with the increase of direct control bits, corresponding attenuation and phase shift phases are respectively increased to 512 bits from original 64 bits, and each attenuation state and each phase shift state can be selected from a plurality of states under the condition that external 6-bit control bits are not changed. Different code values can be written into a table look-up code value register to realize on-chip adjustment and optimization of an amplitude-phase multifunctional chip according to index requirements of different attenuation phase shift precisions of a system.

Description

technical field [0001] The invention relates to the technical field of chip circuit design, in particular to an attenuation phase-shifting architecture with adjustable amplitude and phase precision. Background technique [0002] Achieving high-precision numerical control attenuation and phase shifting is the core technology of the phased array transceiver system. However, in the actual chip circuit design, there is often a certain deviation between simulation and actual measurement. For example, for the 6-bit attenuation and 6-bit phase shift required by the system, if the design is aimed at the 6-bit direct control bit attenuator and the 6-bit direct control phase shifter for simulation, there is often a certain amplitude and phase accuracy offset in the actual measurement. It is necessary to iteratively optimize the chip to achieve the desired accuracy requirements. [0003] The traditional numerical control attenuator can usually be combined with MOS switch tube, based o...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is: how to solve the problem that the amplitude and phase accuracy of the amplitude and phase control chip in the existing phased array transceiver system needs multiple rounds of chip iterative optimization and cannot be adjusted on the chip according to the requirements of the amplitude and phase accuracy index. An attenuation and phase-shift architecture with adjustable amplitude and phase precision. The invention is based on silicon-based technology, and realizes the precision adjustment of the 6-bit attenuation and 6-bit phase shift required by the entire phased array system through the code value register of the look-up table, and the core module The digitally controlled attenuator and digitally controlled phase shifter can be controlled by 9 or more binary bits respectively, that is, the phased array system can select 6 bits of 64 from 9 bits in total 512 attenuation states and 9 bits in total 512 phase shift states. The code value combination scheme with the best amplitude and phase performance in the state, the data stored in a total of 128 9-bit binary code value registers can be written and read, and the amplitude and phase accuracy can be adjusted freely by modifying the data stored in the register

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