Figure 1
Table 1 for DC Power Supply
As every electronic machine, the UIDE also needs a power supply to run. This
device supplies the right voltages to the blocks for the equipment to run, as shown in table 1, there are different voltages, (3, 5, -5, 12, -12, 15, -15, 75, 100…..) volts, from 3 to 15 (low voltage) are used to supply ICs, transistors, etc., 75 and 100 volts (relative high volts) supply the power needed to excite the probe´s crystals; not all the power supplies have to supply the voltages showed in figure 2, it depends of the design. Though in figure 1, there is a main power, also there are independent power supplies according to the UIDE´s hardware. Usually the main PS., supplies unregulated voltage to supply the boards and in each board there is a voltage regulator IC.
Linear power supply
This is a well-known PS mainly used for (5, 12, -12, 15 and -15) V, in the easiest explanation way, the PS uses a transformer for lowering the line voltage (110 or 220)V to (5, 12, -12, 15 and -15) V, a diode bridge to rectify the AC,. (A.C., to D.C., positive waves), capacitors to fill the gaps between the rectified positive waves in order to smooth the ripple , a power transistor working all the time for supplying the output voltage, a sample of this output voltage is taken and it is fed to the power transistor (negative feedback) to stabilize the output voltage.