(under subclass 334) Subject matter comprising systems of the type where, in the detector, oscillations are alternately allowed to build up and are quenched at a frequency which is high compared with the modulation frequency.
(1) Note. The quench voltage may be supplied either by the detector itself or it may be supplied separately by a separate quenching oscillator.
(2) Note. The superregenerative devices found here are very
similar to the detector or demodulator systems found in Class 329. However, the superregenerative systems have been excluded from that class since they are more in the nature of a combination of amplifier plus a first detector (i.e., mixer) in which the input comprises a modulated wave and in which the output voltage representing the modulating signal. Therefor, even though the devices to be found here are often claimed as detectors, they are excluded from the detector Class 329 and, since this is the generic class for modulated carrier wave communication systems, they are to be classified here as wave frequency conversion devices. See section III under the class definition of Class 329 for a further understanding of the line of demarcation between the two as to this subject matter.
