Abstract: An oscilloscope includes means for intermittently or periodically adding electrical values to the horizontal and vertical deflection signals thereby producing a convenient juxtaposition or superposition of selectable portions of an input signal.

Abstract: A cathode ray tube (CRT) display system utilizing a parallel line raster scan displays characters formed from matrices of dots written during the parallel line scans. When the parallel lines are vertically displaced horizontal lines, the height of the characters is changed by switching between a sequential scan line raster and an interlaced scan line raster, and the width of the characters is changed by controlling the number of times each of the dots is sequentially displayed in its associated scan line.

Abstract: A high speed vector generating electrical system is provided which provides the deflection voltages required to draw a vector line from one point to another on the screen of a cathode-ray tube. The system is particularly useful for drawing images in any desired pattern on the screen of the cathode-ray tube, whereby the images are composed of a multitude of vector lines. The system of the invention is simplified as compared with the prior art systems of the same general type, and it requires less adjustments and exhibits greater stability. The system also has a readily programmable drawing rate, and it requires shorter drawing time for short vectors.

Abstract: Correlation methods and apparatus are disclosed which make use of Mellin transforms that are scale and shift invariant. There is no loss in the signal-to-noise ratio of the correlation, and data is available for determining any scale difference between the input and reference data.

Abstract: An input signal is converted into a dc voltage proportional to the frequency of the input signal in a frequency-voltage converter, while saw tooth waves are generated in a saw tooth wave generator triggered with the input signal. The dc voltage is applied to a variable resistance circuit where the resistance is changed corresponding to the dc voltage. The period of such saw tooth waves is controlled with the variable resistance circuit so that the saw tooth waves may follow the input signal frequency for automatically indicating at all times a desired number of waveforms on the screen of a cathode-ray tube. The variable resistance circuit may be controlled with means for free running operation of the saw tooth wave generator during the absence of the input signal.

Abstract: Several solutions to the problem of making integrable the known so-called tangent correction circuit of TV receivers are provided. The solutions are: a diode-resistor matrix, a voltage-dependent resistor arrangement or a regulating circuit.

Abstract: A cathode ray oscilloscope deflection system selectively displays an integral number of cycles of a periodic or quasi-periodic input signal, regardless of the frequency of the signal. A wide band phase locked loop, synchronized to the input signal, generates pulses at a pulse repetition rate that is an integral multiple of the frequency of the input signal. A ripple counter converts the pulses into a staircase, x-axis deflection signal having a period equal to the duration of the number of cycles of the input signal selected for display and a predetermined maximum amplitude so that the x-axis of the scope is always swept the same distance regardless of the frequency of the input signal. The number of cycles displayed is determined by the repetition rate of the phase locked loop pulses relative to the frequency of the input signal.

Abstract: A drive circuit for a gated semiconductor device includes a switching device which provides first and second conduction states. The switching device is coupled to a source of direct current potential by means of a first inductor and coupled to the gate of the gated semiconductor device by means of a capacitor. A second inductor is coupled to the gate of the gated semiconductor device. Negative current is produced in the gate of the gated semiconductor device and energy is stored in first and second inductors during the first conduction state of the switching device. Positive current is produced in the gate of the gated semiconductor device during the second conduction state. The first and second inductors provide for enhancement of the positive gate current and also charging of the capacitor during the second conduction state.

Abstract: Constant width drive pulses developed by a pulse generator are shifted in phase relative to control signals locked to synchronizing signals to maintain a predetermined phase relationship between deflection signals produced by a deflection circuit and the control signals.

Abstract: A power supply which produces a pulsating direct current potential from a first source of alternating current potential and provides a direct current potential to a means for developing a viewable display on a kinescope utilizes a filter network which includes a first inductor. The first inductor provides for a relatively constant level of direct current potential to the means for developing a viewable display with a predetermined range of direct current being supplied to the means for developing a viewable display and a relatively constant level of pulsating direct current potential. A second inductor magnetically coupled to the first inductor and the means for developing a viewable display provides a second alternating current potential greater than a predetermined level to the means for developing a viewable display.