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IDDQ Measurement Issues on Class-D Audio Amplifiers

During the IDDQ test on class-D audio amplifiers, it is very common to have a higher current measurement on the Automated Test Equipment (ATE) than on bench. This is an issue that is always present on the ATE-to-bench correlation process. In order to overcome this issue, test engineers have come with several techniques or compensation methods to help reduce the measurement differences between ATE and bench. Some of these methods are going to be discussed in the next sections.

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