Linear Integrated Circuits

Constant Current Limiting Circuit

Constant Current Limiting Circuit: A block of series regulation using simple Constant Current Limiting Circuit is shown in the Fig. 2.119. It is also called short circuit protection circuit as it provides protection against short circuiting. The resistance R4 is added in series with the pass transistor Q1and the load which is called current sensing …

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Protection Circuits in Regulators

Protection Circuits in Regulators: Protection Circuits in Regulators- The series regulator using transistors has no short circuit protection. If the load terminals are shorted accidentally then, Large amount of load current will flow. The pass transistor Q1 will get destroyed. The diodes used in unregulated power supply, supplying the input voltage Vin to regulator circuit …

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Negative Voltage Regulator

Negative Voltage Regulator: Connections for getting negative voltage regulator are shown in Fig. 2.116. An external PNP transistor, Q1 is connected. Resistances can be from 1 kΩ to 10 kΩ. If magnitude of -V1 is less than 9V, connect Vcc+ and Vc to a positive supply such that Vcc+ to Vcc- is greater than 9V, for proper …

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Low Voltage High Current Regulator

Low Voltage High Current Regulator Low Voltage High Current Regulator Circuit is shown below Output voltage from +2 to +7 V and load current can be more than 150 mA. For this one transistor is connected externally, shown as Q1 in the Fig. 2.113. The functional equations are similar to that of basic low voltage regulator …

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IC 723 Voltage Regulator

IC 723 Voltage Regulator: The pin diagram of IC 723 Voltage Regulator along with the various packages is shown in the Fig. 2.109 (a), (b) and (c). Features of IC 723: It works as voltage regulator at output voltage ranging from 2 to 37 volts at currents upto 150 mA. It can be used at …

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Astable Multivibrator Using IC 555

Astable Multivibrator Using IC 555: Fig. 2.105 shows the operation of Astable Multivibrator Using IC 555. The threshold input is connected to the trigger input. Two external resistances RA, RB and a capacitor C is used in the circuit. This circuit has no stable state. The circuits changes its state alternately. Hence the operation is …

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