Practical electronic fault finding and troubleshooting By Robin PainMultimeters are ideal items of test equipment for finding many faults in a transistor circuit. However to use a multimeter to test a circuit and find faults it is necessary to have a little knowledge about the circuit, and also to adopt a logical approach in tracking down any faults that may exist. Some transistor equipment may be mains powered. Only qualified persons should attempt to repair mains powered equipment or equipment that contains high or hazardous voltages. High voltages can kill so be warned! The first step when looking at tracing any faults and testing a transistor circuit of any sort is to look for the obvious or major faults.
Electronic Circuits Fundamentals and Applications
It isn't enough to be able to design. It isn't even enough to be able to debug. To be a real fault finder, you must be able to get a feel for what is going on in the circuit you are examining. In this book Robin Pain explains the basic techniques needed to be fault finder. Simple circuit examples are used to illustrate principles and concepts fundamental to the process of fault finding.
This paper presents a novel fault diagnosis method for analog circuits using ensemble empirical mode decomposition EEMD , relative entropy, and extreme learning machine ELM. First, nominal and faulty response waveforms of a circuit are measured, respectively, and then are decomposed into intrinsic mode functions IMFs with the EEMD method. Next, a feature vector is obtained for each faulty circuit. Finally, an ELM classifier is trained with these feature vectors for fault diagnosis. Via validating with two benchmark circuits, results show that the proposed method is applicable for analog fault diagnosis with acceptable levels of accuracy and time cost.
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