29 Jun '12, 3pm

The IP3 specification demystified: Thanks to Maxim's Kuo-Chang Chan for spelling it out for us! via @ednmagazine

The IP3 specification demystified: Thanks to Maxim's Kuo-Chang Chan for spelling it out for us! via @ednmagazine

This article explains the origin and purpose of intercept point (IP) specifications. These specifications are called simply IPn which indicates “intercept points of order n,” where n is an integer starting from 2. The IPn are indicators of good linearity in an electronic device such as an LNA (low noise amplifier), RF mixer, or PA (power amplifier). Since IPn consists of “virtual” parameters (i.e., the values are actually defined from other specifications), their values and extrapolations often remain vague. Admittedly, many electronic books or tutorials give some description of how IPn specifications are linked with input/output powers, power gain, and compression point. However, those reference works offer minimal, none, or incomplete explanations about IPn specifications and their origin. Today, integrated functions such as an LNA, mixers, and a VCO (voltage controlled ...

Full article: http://www.edn.com/design/test-and-measurement/4376465/Th...

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