ELECTRICAL OSCILLATION GENERATORS BASED ON ENERGY FEEDBACK SYSTEMS

摘要

1427344 Oscillators G O OKIKIOLU 7 Dec 1973 [8 Dec 1972] 56862/72 Heading H3F An oscillator comprises a closed chain of elements, each comprising a microphone, e.g. 32 coupled to the input of an amplifier, e.g. 35 feeding a corresponding loud-speaker, e.g. 29 which is acoustically coupled to the microphone, e.g. 33 in the next element. Alternatively, the microphones and loud-speakers may be replaced by optical pick-up and generating elements.