Build tunnel-diode pulse generators.
Pulse generators using tunnel diodes as output switching elements driven by on-off current sources
Garrahan, N. M.↗
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Results for “PULSED GENERATOR”
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Pulse Generator
An apparatus and a computer-implemented method for generating pulses synchronized to a rising edge of a tachometer signal from rotating machinery are disclosed. For example, in one embodiment, a pulse state machine may be configured to generate a plurality of pulses, and a period state machine may be configured to determine a period for each of the plurality of pulses.
Greer, Lawrence↗
Programmable Pulse Generator
New pulse generator programmed to produce pulses from several ports at different pulse lengths and intervals and virtually any combination and sequence. Unit contains a 256-word-by-16-bit memory loaded with instructions either manually or by computer. Once loaded, unit operates independently of computer.
Rhim, W. K.↗
Highly Efficient Vector-Inversion Pulse Generators
Improved transmission-line pulse generators of the vector-inversion type are being developed as lightweight sources of pulsed high voltage for diverse applications, including spacecraft thrusters, portable x-ray imaging systems, impulse radar systems, and corona-discharge systems for sterilizing gases. In this development, more than the customary attention is paid to principles of operation and details of construction so as to the maximize the efficiency of the pulse-generation process while minimizing the sizes of components. An important element of this approach is segmenting a pulse generator in such a manner that the electric field in each segment is always below the threshold for electrical breakdown. One design of particular interest, a complete description of which was not available at the time of writing this article, involves two parallel-plate transmission lines that are wound on a mandrel, share a common conductor, and are switched in such a manner that the pulse generator is divided into a "fast" and a "slow" section. A major innovation in this design is the addition of ferrite to the "slow" section to reduce the size of the mandrel needed for a given efficiency.
Rose, Franklin↗
Precise-Test-Pulse Generator
Precise test pulse with stable duration and amplitude needed for calibration of test equipment. Precise-test-pulse generator provides such waveform and has additional desirable features. Circuit produces single test pulses of stable duration and amplitude. Made of commercially available integrated circuits and discrete components.
Eichenberg, Dennis↗
A novel high voltage pulse generator
High voltage pulse generator with solid state components - transistor circuits
SOLID STATE DEVICE↗
High voltage pulse generator Patent
High voltage pulse generator for testing flash and ignition limits of nonmetallic materials in controlled atmospheres
Pippen, D. L.↗
A resettable monostable pulse generator
Resettable memory circuit with pulse generator for sampling and measuring galactic X-ray
PULSED GENERATOR↗
Multiphase clock-pulse generator uses simplified circuitry
Multiphase clock-pulse generator converts a simple pulse train into nonoverlapping clock pulses. The generator employs multistable circuits to minimize the number of electronic components.
Source record↗
Some variations of tunnel diode pulse generator circuits
Variations of tunnel diode pulse generator circuits
LOGIC CIRCUIT↗
High-Precision Pulse Generator
A document discusses a pulse generator with subnanosecond resolution implemented with a low-cost field-programmable gate array (FPGA) at low power levels. The method used exploits the fast carry chains of certain FPGAs. Prototypes have been built and tested in both Actel AX and Xilinx Virtex 4 technologies. In-flight calibration or control can be performed by using a similar and related technique as a time interval measurement circuit by measuring a period of the stable oscillator, as the delays through the fast carry chains will vary as a result of manufacturing variances as well as the result of environmental conditions (voltage, aging, temperature, and radiation).
Katz, Richard↗
Pulse generator using transistors and silicon controlled rectifiers produces high current pulses with fast rise and fall times
Electrical pulse generator uses power transistors and silicon controlled rectifiers for producing a high current pulse having fast rise and fall times. At quiescent conditions, the standby power consumption of the circuit is equal to zero.
Woolfson, M. G.↗
Recent progress in picosecond pulse generation from semiconductor lasers
This paper reviews the recent progress in producing picosecond optical pulses from semiconductor laser diodes. The discussion concentrates on the mode-locking of a semiconductor laser diode in an external resonator. Transform-limited optical pulses ranging from several picoseconds to subpicosecond durations have been observed with active and passive mode-locking. Even though continuing research on the influence of impurities and defects on the mode-locking process is still needed, this technique has good promise for being utilized in fiber-optic communication systems. Alternative methods of direct electrical and optical excitation to produce ultrashort laser pulses are also described. They can generate pulses of similar widths to those obtained by mode-locking. The pulses generated will find applications in laser ranging and detector response measurement.
Auyeung, J. C.↗
High-power semiconductor-magnetic pulse generators.
Monograph on high power semiconductor-magnetic pulse generators, noting saturable inductors and silicon controlled rectifiers, circuit analysis, voltage regulator, etc
PULSED GENERATOR↗
A single-board preprocessor and pulse generator
The Aeronomy Lab. of NOAA has designed and built a single board, programmable radar controller for use with VHF ST (stratosphere troposphere) radars. The controller consists of a coherent integrator preprocessor and a radar pulse generator, both of which are described, as well as interfaces to an antenna beam switch and a receiver bandwidth switch. The controller occupies a single slot in a Data General Nova of Eclipse computer. The integrator and pulse generator take advantage of high density, dual port FIFO chips such as the 512 x 9 Mostek MK 4501. These FIFOs have separate input and output ports and independent read and write cycles with cycle times of less than 200 ns, making them very fast and easy to interface. A simple block diagram of the coherent integrator is shown. The integrator is designed to handle inputs from one receiver (2 channels) with 1 sec sample spacing. The pulse generator is based on controllers designed by R. F. Woodman for the Arecibo and SOUSY radars us a recirculating memory scheme.
Carter, D. A.↗
Optical pulse generator using liquid crystal light valve
Numerical optical computing is discussed. A design for an optical pulse generator using a Hughes Liquid crystal light valve and intended for application as an optical clock in a numerical optical computer is considered. The pulse generator is similar in concept to the familiar electronic multivibrator, having a flip-flop and delay units.
Collins, S. A., Jr.↗
Versatile low-power-drain hybrid tunnel diode pulse generator.
Low power drain hybrid tunnel diode pulse generator for delay circuits, gated oscillators, frequency limiters and leading and trailing edge discriminators
Cancro, C. A.↗
Ultrashort pulse generation in semiconductor lasers
Techniques to generate picosecond optical pulses from semiconductor lasers are reviewed. Experimental methods and results of theoretical analysis of active modelocking are presented. It is shown that modelocking will achieve the shortest pulses; but the use of a cumbersome external cavity will probably limit its practical use. Short pulses produced by direct modulation such as gain switching are considerably broader than those obtained by passive modelocking. However, no external cavity is needed; and the simplicity of this method makes it important to be explored further. Recent experimental results are discussed where picosecond pulses from a buried heterostructure laser diode with ultrashort current pulses obtained from a comb generator are generated. Also, 28 ps pulses were obtained at 2.5 GHz repetition frequency, using the gain switching method. An analytical analysis based on the rate equations shows qualitative agreement with our experimental results.
Auyeung, J.↗