Douglas W. Taylor

Application Of Rotationally Non-Symmetrical Electron Lenses to T.V. Image Reproduction

Recent developments in the art have dictated the division of this paper into two component parts. The first deals with a quadrapolar, magnetic lens of rotational non-symmetry used to achieve scan magnification with a television cathode ray tube. The second concerns the development of a negative, electrostatic, gauze lens exhibiting full rotational symmetry which is also used to provide scan magnification.

Yoke Analog Vertical Deflection Systems

The yoke analog consists of a series RC network connected across the yoke. If the time constant of this network is exactly equal to the L/R time constant of the yoke, the voltage across the resistor of the RC network will, at all times, be the same as the voltage across the inductive component of the yoke. Since a linear current ramp through the yoke requires a constant voltage across its inductive component, linear scan can be achieved by sensing the analog voltage, comparing it to a D.C. reference voltage and amplifying any error voltage so as to change the yoke current in the required manner. The discussion compares the yoke analog system with conventional systems and cites the relative merits of the analog approach. The generalized design procedures for yoke analog systems are discussed and one particular circuit is covered in detail.

Techniques for the evaluation and utilization of transistors in the UHF region

In the UHF frequency range where a quarter wavelength is of the order of 10 centimeters, it is usually quite difficult to perform accurate measurements, especially in the case of transistor amplifiers. This paper covers some techniques that can be used to obtain performance data and to construct practical amplifiers for gain and noise figure measurements. As is the case with most circuit techniques, an impedance bridge is absolutely essential.

An epitaxial-base Germanium power transistor for television horizontal deflection

The evolution of a transistor designed specifically for television horizontal deflection is described in this paper. Device requirements are discussed and the required device design compromises are listed. The technique of epitaxy is indicated as a means of avoiding some of the usual device design compromises. The characteristics of the resulting epitaxial transistor are given. A few circuit design considerations are discussed.