A test circuit for use in testing amplifiers in order to check that they are functioning properly at operational power levels. The test circuit includes switching mechanisms which configure the amplifier in feedback mode in order to cause the amplifier to oscillate and a circuitry for measuring the power...http://www.google.fr/patents/US5006812?utm_source=gb-gplus-shareBrevet US5006812 - Power amplifier with built-in test circuit
