Testing method for circuit board testing system

A test system and working method technology, applied in the direction of electronic circuit testing, etc., can solve the problems of limiting the number of test nodes, slow detection speed, etc., to achieve the effect of improving self-test and detection, good scalability, and a large number of test nodes
CN102495354BInactive Publication Date: 2013-12-18东莞市至高机械科技有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
东莞市至高机械科技有限公司
Publication Date
2013-12-18
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a testing method for a contact circuit board testing system. The testing system comprises a computer interface, a first field programmable gate array (FPGA) circuit, a second FPGA circuit and a triode switch array circuit, wherein the first and second FPGA circuits are connected with the computer interface; the triode switch array circuit is connected with the control signal output ends of the first and second FPGA circuits, and at least comprises two groups of geminate transistor circuits; each geminate transistor circuit comprises a PNP type triode and an NPN type triode; and the collectors of the PNP type triode and the NPN type triode are connected. A great number of test nodes are produced, and the FPGA circuits have high extensibility. An effective reference test node can be quickly found, and a node network based on the effective reference test node can be obtained. Anti-jamming capability is high, and the influence of leakage current or leakage voltage on the volt-ampere relationship of the node network can be avoided.
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Description

technical field

[0001] The invention relates to a test working method of a contact circuit board test system Background technique

[0002] In the modern electronics industry, printed circuit boards have been widely used, and various methods for detecting the quality of circuit boards have emerged due to the urgent needs of the industry. The contact detection of the circuit board can be understood as the computer-controlled automatic online detection ICT (In-CircuitTester). The tested circuit board is fixed on the test platform fixture through a pneumatic mechanism, and n tested Measuring points (usually the number of n is determined by the number of pads or vias on the circuit board), through full contact with the probes connected to the test nodes in the triode switch array and the pads or vias, the triode switch array and Its control circuit is the key to system testing, and the paired circuit composed of PNP and NPN transistors is the most basic unit circuit that constit...

Claims

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