Is it possible to get negative voltage

In a simple battery circuit, the ground point is usually the minus terminal of the battery. Therefore the position of his feet becomes negative. Remember — a battery being 9V means the plus terminal is 9V higher than the minus terminal.

What happens if we connect the plus of the second battery to the minus of the first one i. This topology requires two inductors or one coupled inductor, but supports continuous input and output current and therefore offers advantages for systems that demand low input and output voltage ripple.

The control loop bandwidth, and therefore its speed, is lower than the inverting buck-boost converter. A solution to this issue is the inverting buck converter. Replacing the input inductor of the CUK converter with a high side switch leads to a new topology; the inverting buck converter.

This consists of a charge pump inverter followed by a step-down converter and requires only one inductor. As the charge pump stage does not boost the input voltage, the voltage across the internal switches is only V IN , so lower than in the inverting buck-boost or CUK converter. This means more efficient low voltage switches can be used.

The output LC of the buck-stage filters the output voltage so output voltage ripple becomes very small. This reference voltage is set to a voltage slightly less than in absolute value the output voltage. The TPS accepts inputs ranging from 3. Figure 3 shows the schematic of an inverting buck converter optimised for a typical 5V input voltage generating a Small size ceramic capacitors used on the input, the CP pin and the output have small electrical series resistance and therefore provide lowest output voltage ripple.

TPS provides the highest efficiency of comparable solutions. The QFN package with thermal pad provides a low thermal resistance to the pcb. This keeps the junction temperature low, even when the device is. Author Thomas Schaeffner. Texas Instruments. One-off usage is permitted but bulk copying is not. For multiple copies contact the sales team. This is good because the orientation will allow the electrical charge to reach the appliance.

A negative voltage is generated when you reverse the polarity. It is problematic in conventional situations because it transmits the electrical charge to the ground. A positive voltage, on the other hand, transmits the charge to the positive side of the circuit. If you can understand positive voltage, then a negative voltage is merely a reversal of the polarity.

The reverse is also true. If you know what negative voltage is, then a positive voltage is a reversal of the polarity. You may start to appreciate what these two terms mean once you realize how current and electrons move between terminals. That is the key to deciphering the difference between the negative and positive voltage. As was noted before, an electrical charge flows between two points of varying energy levels.

The polarity will show you the terminal that has a higher energy level. As was also mentioned before, the plus sign is designed to represent the positive terminal, the pole with the higher energy. If the difference between poles creates the force that allows a current to move, in what direction does that current move?

In a conventional circuit, the current will flow from the positive to the negative terminal. In other words, the charge must move from the terminal with a higher energy level to the terminal with a lower energy level. They move in the opposite direction, from negative to positive.

In that regard, you could approach your definition of the difference between negative and positive voltage from several angles. They would describe the positive voltage as a state in which the body has an abundance of positive charge, with the negative voltage being the reverse. This is why they flow from a negative pole to a positive pole.

You should keep in mind the fact that positive voltage is higher while the negative voltage is lower. Generally, you should focus your efforts on understanding the flow of current and electrons.

Remember that current moves from positive to negative whereas electrons move from negative to positive. The definition of voltage is so broad and seemingly vague because the voltage is relative.

To understand it, you must measure the voltage against a zero-point reference. This is where the ground enters the picture. You also need to keep in mind that voltage is relative. So like I mentioned before, most people reference to "ground"; but what is ground? You can say ground is earth ground, but what about the case when you have a battery powered device that has no contact to ground.

In this situation we have to treat some arbitrary point as "ground". Usually the negative terminal on the battery is what we consider from this reference. Now consider the case that you have 2 batteries in series. If both were 5 volts, then you would say you would have 10 volts total. In this situation we can make the decision that we want to make the connection between the 2 batteries be our "ground" reference.

Imagine you're measuring the height of a car. You could take a tape measure and measure the distance from the ground to the roof of the car. You could also stand on the roof of the car and dangle the same tape measure down to the ground. 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. If I connect terminal A of a device to potential of 30 volts and terminal B to a potential 20 volts. The potential from A to B is 10 volts, but the potential from B to A is - 10 volts. To say you have a voltage of -5V at point B means that 'ground' is 5 volts more positive than point B.

As for the second part, you could take the lowest supply terminal from the power supply and call that 0V, then every other voltage would be positive. However, that would be very inconvenient for many circuits. Also, a lot of the power is used between the highest and middle output in effect the charge in the top output originally came from the middle output and wants to go back there , same with the lowest output.

All in all it is easier to label the middle output 0V ground and work with positive and negative voltages.

All this is ignoring earth grounding issues. Some OP-Amps, for example the veteran , require their supply as two voltages, one positive and the other negative with respect to the ground or zero level of the signal input and output.