Digital computers, block diagram

Krizan and Strehlow (1974) described a relatively simple digitizing interface for use in p-jump relaxation experiments which improves the accuracy and rapidity of data acquisition. A block diagram of the p-jump apparatus with digitizing interface is shown in Fig. 4.5. With this interface, one can sample by repeating the experiments and adding data to a small on-line computer. 

Figure 12.4. Block diagram of a modem NMR spectrometer. These systems use superconducting magnets that are based on a solenoid of a suitable alloy (e.g., niobium/titanium or niobium/tin) immersed in a dewar of liquid helium. The extremely low temperature of the magnet itself (4.2 K) is well insulated from the sample chamber in the center of the magnet bore. The probe in which the sample is housed usually incorporates accurate temperature control over the range typically of 4 to 40°C for biological samples. The rf coil in the probe is connected in turn to a preamplifier, receiver circuitry, analog-to-digital converter (ADC), and a computer for data collection.

Figure 23.1 provides a block diagram of the essential components of a typical digital-computer configuration. The memory is a component capable of storing many thousands of binary-coded (digital) packets of information. Each packet is com-... 

Figure 2 Block diagram of a typical LIOAS setup. A, variable attenuator B, beam splitter S, slit C, quartz cuvette T, transducer AMP, amplifier EP, energy probe EM, energy meter DSO, digital sampling oscilloscope PC, personal computer.

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