Showing papers on "Circuit diagram published in 1976"

Automatic circuit analysis based on mask information

Abstract: A Circuit MAsk Translator (CMAT) code has been developed which converts integrated circuit mask information into a circuit schematic. Logical operations, pattern recognition, and special functions are used to identify and interconnect diodes, transistors, capacitors, and resistances. The circuit topology provided by the translator is compatible with the input required for a circuit analysis program.

Velocity‐tracking circuit for a laser Doppler velocimeter using real‐time spectrum analysis

Abstract: A circuit is described which will adapt a laser Doppler velocimeter using real‐time spectrum analysis for automatic velocity tracking. The circuit provides an analog voltage which is proportional to velocity by tracking the position of crossing of a selected intensity level on the spectrum analyzer output. Examples of applications to the study of protoplasmic streaming and simulated hemodynamics are presented.

On the topological aspects of the circuit layout problem

Abstract: This paper investigates the topological and geometrical characteristics of the circuit layout problem. A topological layout procedure is presented. This procedure can be especially useful for integrated circuit layout.

Integrated crystal oscillator circuit with few external components

Abstract: A semiconductor integrated oscillator circuit requiring higher impedances than are practical by integrated circuit technology and generally provided by discrete components external to the circuit are functionally provided in the integrated circuit by a "current mirror" circuit which provides the bias function separate from the signal function.

Radio instrument display panel - shows mimic circuit at all times and shows specific operation state only on illumination

Abstract: A display panel for monitoring communications equipment of small dimensions, may be constructed as a portable unit, or it may be built into a radio or other equipment. A panel of transparent material has appropriate wording printed on it, for example by silk screen printing on the back of a glass clear of smokey plastic panel (1) with the circuit diagram of the unit involved (2) so that this mimic circuit is visible whether the panel is or is not illuminated. A second opaque plate (2) covers the first with clear gaps where symbols are to be displayed as well as along the current paths of the mimic diagram. Illumination from the rear is by luminous diodes (10) suitably screened, and provided if necessary with light guides.

The poloidal field circuit in the Joint European Torus /JET/

Abstract: This paper describes some aspects of the circuit which produces the plasma (3.8–4.8MA) and keeps it in equilibrium. The flux of JET transformer is driven almost equally in both directions -18…+16Vs. The main power source for the “basic” performance (3.8MA plasma) is a generator-rectifier set rated at 70kA, 4.5kV D.C. and 600MJ energy. For the extended performance (4.8MA plasma) an additional thyristor bridge (80kA, 1.5kV, 800MJ) is used fed by the network. Two circuit breakers each rated at 24kV, 70kA will produce at the beginning of the pulse a transformer voltage of 140V/turn which raises the plasma fast, 10–20MA/s. The circuit can also produce fast rising fields necessary to compress a plasma (1MA) from 3.43 to 2.34 m major radius in a time of 25–50ms. The power needed is some 400–500MW and is delivered by two inductors with 2 × 12.5MJ stored energy, rated at 12.5–25kA and 2 × 20kV.

The open-circuit voltage of vertical-junction solar cells

Abstract: It is shown that vertical-junction solar cells can always be designed to have larger open circuit voltages than comparable horizontal-junction cells, in contrast to the conclusions of a recent analysis, by Dhariwal et al. (1975).

Automatic circuit analysis based on mask information

Abstract: A Circuit MAsk Translator (CMAT) code has been developed which converts integrated circuit mask information into a circuit schematic. Logical operations, pattern recognition, and special functions are used to identify and interconnect diodes, transistors, capacitors, and resistances. The circuit topology provided by the translator is compatible with the input required for a circuit analysis program.

Tangent sweep circuit

Abstract: A tangent sweep circuit for application in recording of airborne i.r. line-scan data is described, which uses only low-cost components. Sweep parameters are directly related to circuit parameters, and a sweep velocity signal is available. Minor modifications give hyperbolic or hyperbolic-tangent waveforms.