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AssigneeHycon Technology Corp.
InventorsPo-Yin Chao, Hung-Wei Chen, Shui-Chu Lee
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Disclosed is a high accurate measurement circuit, and the feature is using bias switching circuit for compensating front end offset, and the back end offset of amplifier is also cancelled. In the real measurement environment, offset exists in the amplifier of the measurement circuit has, and non-ideal effects also exist in the interface between measurement terminal and the measurement circuit, such as leakage current of chip package pins or mismatch of the circuit. The above non-ideal effects belong to front end offset and cannot be compensated by the prior arts. The disclosed structure uses the bias switch circuit and uses different switching method in the two measurement timings. By subtracting the measurement results for the two measurement timings, the front end offset is compensated, and the back end offset of the amplifier is also cancelled.
An accurate measurement circuit which compensates offset of a front end circuit while performing current measurement, comprising:
An accurate measurement circuit which compensates offset of a front end circuit while performing current measurement, comprising:
An accurate measurement circuit which compensates offset of a front end circuit while performing current measurement, comprising:
An accurate measurement circuit which compensates offset of a front end circuit while performing current measurement, comprising:
Dependencies are inferred from the claim text.