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| AN IMPROVEMENT ON MODEL EA4110/4114 MODULE LOCK-IN AMPLIFIER AND THE IMPEDANCE SPECTRA MEASUREMENT OF Fe/ACID CORROSION SYSTEMS |
| Cai Shengmin Vu Pu Yang Wenzhi (Chemistry Department;Peking University) |
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Abstract Model 4110(phase sensitive detector)and 4114(phase control unit)are integrated circuit modules(Evans Associates,Berkeley,CA,U.S.A.) which can be coupled to form a lock-in amplifier originally designed for use at narrow frequency ranges(±33% around the chosen central frequency f_0). We improved the modules and constructed the Model A lock-in amplifier useful for a wide band of frequencies(0.2 Hz to 40K Hz).The Model A lock-in amplifier has been applied to corrosion systems Fe/acid and proved satisfaetory for impedance spectra measurements of these systems.
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Received: 25 April 1985
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Cite this article:
Cai Shengmin Vu Pu Yang Wenzhi (Chemistry Department;Peking University). AN IMPROVEMENT ON MODEL EA4110/4114 MODULE LOCK-IN AMPLIFIER AND THE IMPEDANCE SPECTRA MEASUREMENT OF Fe/ACID CORROSION SYSTEMS. J Chin Soc Corr Pro, 1985, 5(2): 126-134.
URL:
https://www.jcscp.org/EN/ OR https://www.jcscp.org/EN/Y1985/V5/I2/126
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