Southeast University

Inspur Suzhou Intelligent Technology Co., Ltd

Jie Sun

Longxing Shi

Hong Li

Chao Chen

Zixuan Wang

Jianhui Wu

Meng Zhang

Zhixin Ren

Ke Liu

Chuang Zhang

Zhiyi Ye

Zhongxiang Sun

Provided is a data query method, applied to a heterogeneous acceleration platform. The data query method includes: determining operators in a database management system, and accomplishing, in a parallel processor, functions corresponding to the operators (S); if an SQL query statement is received, converting, by using a CPU, the where clause in the SQL query statement into a data structure including a binary tree and a linked list (S); controlling the CPU to generate an operation code stream of the data structure according to node information (S); and performing, by using the parallel processor, a screening operation corresponding to the operation code stream on records in the database management system to obtain a query result conforming to the where clause (S).

Data query method and system, heterogeneous acceleration platform, and storage medium

A return-type current-reuse mixer having a transconductance/amplification stage, a mixing stage, and a high-pass and a low-pass filter network. The transconductance/amplification stage has a current-reuse CMOS topology wherein an input frequency signal is converted into a frequency current, low-frequency components are removed from the frequency current by the high-pass filter network, the frequency current is fed into the mixing stage, modulation occurs in the mixing stage, and then an intermediate-frequency signal is generated and output. Once high-frequency components are removed from the intermediate-frequency signal by the low-pass filter network, the intermediate-frequency signal is sent again for input into the transconductance/amplification stage, then amplified in the transconductance/amplification stage and output. The mixer transconductance/amplification stage employs a current-reuse technique. The input frequency and the output intermediate-frequency signal share a common transconductance/amplification stage. The mixer reduces power consumption, simplifies the circuit topology, and provides high conversion gain.

Return-type current-reuse mixer

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Jiangsu, China

Jie Sun