Inductive Test Pencil(CD4069)

Published:2011/9/8 1:34:00 Author:Sue | Keyword: Inductive, Test Pencil | From:SeekIC

    The picture shows the inductive test pencil. Its sensitivity is higher than common test pencil's sensitivity and it can test the wire's electrical  property which the common test pencil can't do. IC1 is six phase inverter integrated circuit CD4069. Its inverter IC1-1 and the devices around will constitute a voltage amplifier with a high input impedance and a high gain. After the probe receives weak field signal, it is amplified and output by the amplifier and is transformed by phase-inverter IC1-2. Then it will controls the late grade circuit. The phase-inverter IC1-5,IC1-6 and resistor R5 and capacitor C2 will constitute multivibrator. Its work is controlled by the inverter IC1-3's working state.



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