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1 page/≈275 words
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English (U.K.)
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Evaluating the Design of a Lock in Amplifier (Coursework Sample)


design of a lock-in amplifier based micro-ohmmeter, capable of measuring very small resistances without applying large currents.


This paper presents the design stages of a lock-in amplifier micro-ohmmeter. Theories, functions of devices and design calculations associated with each design stage is presented. The micro-ohmmeter in this design can be used to measure small resistances, which may include but not limited to the resistance between probes of an excitation signal and the resistance in components of printed circuit boards. Theoretical analysis of the design is useful in cases where the circuit is to be implemented or simulated with software such as Proteus VSM. This enables the engineer to compare simulation results with theoretical outcomes

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