Simple Circuit Technique Research Articles

A "hodoscoped" cosmic-ray recorder

A portable Geiger-Muller counter apparatus is described. It includes an eight-channel hodoscope and is designed for use at great depths. Simple transistor circuit techniques are used in conjunction with magnetic tape recording. A discussion is given of the operation of counters from a stabilized voltage supply for greatest possible battery life. The complete equipment consumes about 50 mW and will operate unattended from one set of batteries for longer than a month. The apparatus has been operated successfully in a coal mine at a depth of 1500 ft below the surface.

Processing of the NTSC Color Signal for One-Gun Sequential Color Displays

Circuit techniques for decoding the NTSC color signal to produce three sultaneous color signals, suitable for a three-gun display, are now well known. This paper describes simple circuit techniques for directly processing the NTSC signal at the color receiver to form a signal suitable for a one-gun sequential color display. These circuits fall broadly in two classes, namely, those used to modify the form of color subcarrier signal, and those used to modify the luminance signal. The latter class of circuits generally demodulate some of the color subcarrier signal, and correct the luminance signal in such a manner that constant-luminance operation results.