Abstract
Negative impedance converter is an important theory in circuit design and has been widely used in engineering technology, such as network reactive power compensation, positive impedance elimination, antenna design and so on. Based on the analysis of the circuit principle of a common negative impedance converter, the improved circuit is analysed and simulated. The improved circuit is applied to the impedance design of moving-coil geophone. After experiments with this improved circuit, the expected results have been achieved. The goal of bandwidth expansion has been achieved preliminarily.
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