How does a negative voltage regulator work?

If the input voltage conditions are not applied, the regulator simply works as a resistive circuit where input is equal to output. LM7912 is a negative voltage regulator used for regulating negative voltages. These are specially designed to regulate negative voltages.

What is positive voltage regulation?

The 78xx line are positive voltage regulators: they produce a voltage that is positive relative to a common ground. 78xx and 79xx ICs can be used in combination to provide positive and negative supply voltages in the same circuit.

Is an example of fixed negative voltage regulator?

Examples:- 7805, 7806, 7809 etc. A negative fixed voltage regulator is same as the positive fixed voltage regulator in design, construction & operation. These IC’s are designed to provide a negative output voltage. Example:- 7905, 7906 and all those IC’s in the 79XX series.

Is an example for fixed negative voltage regulator?

​Fixed-Negative Voltage Regulator: The series 79XX regulators are the three-terminal IC regulators that provide a fixed negative output voltage. This series has the same features and characteristics as the series 78XX regulators except for the pin numbers which are different.

Which voltage regulation is best?

The ideal voltage regulation should be zero.

What is need voltage regulation?

The voltage regulator is needed to keep voltages within the prescribed range that can be tolerated by the electrical equipment using that voltage. Voltage regulators also are used in electronic equipment in which excessive variations in voltage would be detrimental.

Why does my multimeter read negative voltage?

If the poles of your voltmeter are correctly connected, there is a possibility that the battery suffered a phenomenon called “polarity reversal”. In this case there is the possibility that battery B will get a negative voltage. This can happen when there is a mixed use of old and new batteries together.

What does it mean when a voltage source has negative voltage?

In the case when a voltage source has negative voltage, it just means the negative terminal of the battery is connected to the positive side of the circuit and the positive terminal of the battery is connected to the negative side of the circuit .

How much voltage is generated from a negative linear regulator?

A negative linear regulator for generating a negative voltage. If a negative linear regulator, like the one shown in Figure 2, is being used, the generated –3.3 V is being regulated in relation to the 0 V ground voltage.

What is the voltage rail for positive and negative voltages?

For the positive voltages, +3.3 V are already available in the system. For the necessary negative voltage of –3.3 V, an available support voltage of –5 V may be utilized. This voltage rail may come from a transformer-based power supply.

What does the negative sign mean on a voltmeter?

Voltage works the same way. The negative sign is just a convention, in the same way that the car has the same height, regardless of which way you measure it. Flip your multimeter leads, and the negative sign will disappear. Voltage is a difference in potential.