Analog and Digital Simulations

The first circuit we will look at is an op-amp circuit that drives the clock of a J-K flip-flop. Wire the circuit shown below  

Since the frequency of the pulse generator is 1 kHz, we will run a Transient simulation for 15 ms to allow 15 cycles. To run a digital simulation we must set up the Transient Analysis, as well as specify parameters for the digital simulation. We will first set up the Transient Analysis. Select PSpice, and then New Simulation Profile from the Capture menus  

Constant logic 1 - select Place Power from the menus to place this part 7414 

Specify a name for the profile and click the CtBOtS button  

Oonorai] Anayi j indudn Pilot Libranst Stimulus Options DatoCoiltclion Proto Wndow) nalytis typo  

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Safriet, B, E., Analysis of Pressure Pulsation in Reciprocating Piping Systems by Analog and Digital Simulation, ASME 76-WA/DGP-3, New York, NY American Society of Mechanical Engineers, 1976. 

A characteristic feature of nonlinear science generally, and of nonlinear optics in particular, is the common necessity of having to make simplifications, and then approximations in order to solve the equations of even the simplified models. These considerations apply a fortiori to the study of fluctuation phenomena in nonlinear systems, and thus account for the increasing role being played by analog and digital simulations, which enable the behaviour of the model systems to be investigated in considerable detail. 

Figure F-30 is an example of a system requiring compression of the gas upstreeun of the turbine. Some manufacturers offer a precompression gas conditioning package, as well as pulsation dampeners and a high-efhcienQr vertical absolute separator downstream of the compressor. Some manufacturers also offer both analog and digital simulations to solve dampening and vibration difhculties.

Today, computer simulation is used extensively to analyze the dynamics of chemical processes or aid in the design of controllers and study their effectiveness in controlling a given process. Analog and digital computers have been used for this purpose, with the emphasis having shifted almost entirely in favor of the digital computers. 

Temperature measurement via spoon Ma-Tech-Mentoring, 2008 Design and development of a spoon, which messures the temperature and indicates via LED a violation of temperature limit. Electronic engineering, analog and digital circuit technology, measurement and sensor technology, computer aided simulation, material science... 

Hybrid computer simulations were composed of two parts the analog and digital computer portions. This made debugging complicated, since both parts had to be debugged and then integrated. 

Axial and radial dispersion or non-ideal flow in tubular reactors is usually characterised by analogy to molecular diffusion, in which the molecular diffusivity is replaced by eddy dispersion coefficients, characterising both radial and longitudinal dispersion effects. In this text, however, the discussion will be limited to that of tubular reactors with axial dispersion only. Otherwise the model equations become too complicated and beyond the capability of a simple digital simulation language. 

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