High speed hybrid active load pull
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United States of America Patent
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May 30, 2017
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app pub date -
Aug 27, 2015
filing date -
Aug 27, 2014
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Abstract
A high speed tuning and measuring algorithm is used for production level testing on-wafer a large number of chips. It applies to a hybrid active injection load pull test system. Using a pre-calibration of the passive tuner and the amplitude and phase settings of the active power injection signal and employing fast harmonic receiver VNA the test system is capable of executing frequency and time domain load pull measurement sets including more than 50 impedance points in a total of 1 second for quantities such as delivered input and output power, PAE, power gain and other. Overall test time, including device hoping and biasing on the automatic probe station is less than 1.5 seconds. This enables production level load pull operations.
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