0
When powering an op-amp from a single voltage source should vss- and common ground be connected?
Wiki User
∙ 16y ago
It depends on what you're trying to do. If you need a comparator or a trigger, then, no. If you're using it for audio or some other type of AC signal, then you need to set up a 1/2 vcc. reference to allow the op-amp to swing from plus and negative voltages.
Since the op-amp is a voltage controlled device, you can use a coupe of resistors in series, one from the plus rail and one from the negative rail, connecting the "ground" reference to the junction of the two. Just about any value will work as long as they're matched values. Try using a couple of 100 k. resistors or you can even go up to 470 k, if you really want to keep the current limited.
Bear in mind though that there are applications where offsets are needed, but without knowing your particular applications' requirements, there's not a lot of advice I can give you.
Wiki User
∙ 16y ago
Add your answer:
Earn +20 pts
Does line to ground voltage always half the value of line to line voltage?
Line to Ground voltage = line to line voltage / 1.73AnswerIt depends what configuration is being measured. In the case of the secondary of a split-phase distribution transformer used to supply residences in North America, the answer is yes. In the case of a star (wye) connected secondary distribution transformer used to supply residences in Europe, no: the line to ground voltage will be as described in the first answer.
Does voltage on ground mean open ground?
Voltage on ground can mean an open ground. It can also mean (high) current on ground, due to a ground fault such as reversed neutral and ground.
Where must a voltmeter be placed in a circuit?
One does NOT insert a voltmeter in a series cirtcuit...an ammeter can be inserted in series, though. A voltmeter is connected in parallel with the source voltage and low(ground) side.
Why do you need a parallel circuit to measure voltage?
Voltage is a defined as a difference in potential. So to measure voltage, you need to look at the difference in potential between two different nodes in a circuit. For example, to know the voltage of a capacitor, you are looking at the difference in potential from one terminal of the capacitor to the other. Even if it is installed in a circuit. It is for this reason, that the measurement is across the circuit, or in parallel with it. One common point of confusion in voltage measurement is the way it is presented. Someone will say, that wire is at 5 volts. The "with reference to" part is often left off. We can say this because most circuits have a direct or implied ground, that all other voltages are referenced to. So the correct thing to say would be "that wire is at 5 volts to ground."
What is the three phase voltage in America?
It varies by location and application. I will assume for this answer that we are talking low voltage (<1000 VAC): Grounded Wye Systems: 208/120 (Common) 480/277 (Common) 600/347 (Rare) Delta: 480 (ungrounded) 240/120 (grounded high-leg) 480/480 (corner grounded- rare and dangerous) The convention used above i.e. 208/120 designates the phase-phase voltage (208) and the phase to ground voltage (120). Some of the common Medium Voltage systems: 4.16 kV, 7.2 kV, 12.47 kV, 13.8kV
In a circuit what is zero volt rail?
A zero volt rail is a rail that is connected to 0V... What do you think it is? The 0V rail is often used as a common ground, although obviously it relies on your ground voltage being 0V.
A potentiometer can act as a voltage divider?
Yes. One leg is connected to ground, the other leg is connected to the input, and the tap is the output.
It is defined as the common reference point in an electric circuit from which voltage is measured?
A Neutral, Common, or Ground.
What does the term common refer to when discussing electricity?
A common ground is a connection between an electrical device and a conducting body, such as the ground, which is taken to be at zero voltage.
Why is it that when you touch the neutral in a box that is not connect to the panel cause the test light to come when touching the power wire?
It shouldn't. The open end of a non connected neutral should have the same potential as the voltage feeding the circuit. The only time a voltage will show is when the return neutral is tested with a meter to the neutral bar or the ground return bar. It will then show what the supply voltage to the connected load is. Once this neutral is connected to the neutral bar there will be no voltage shown across the test meter between the neutral and the neutral bar or the ground bar.
Does line to ground voltage always half the value of line to line voltage?
Line to Ground voltage = line to line voltage / 1.73AnswerIt depends what configuration is being measured. In the case of the secondary of a split-phase distribution transformer used to supply residences in North America, the answer is yes. In the case of a star (wye) connected secondary distribution transformer used to supply residences in Europe, no: the line to ground voltage will be as described in the first answer.
What do you mean by common emitter configuration and biasing pnp transistors?
A common emitter BJT transistor has the emitter ground. So u measure input voltage at base with respect to the ground, i.e; emitter and also u measure the output voltage at collector with respect to the ground, i.e; emitter. Hence, the emitter is common and thus the name.
What is the maximum voltage a man can be beared?
I was connected many time at 440 V DC, but I stood at full ground, and I'm still alive.
What is the difference between source driver and sink driver?
A source driver applies voltage to a ground (common)-referenced load. A sink driver grounds one side of a load which is already connected to the supply voltage. Given the same family of drivers, sink drivers generally have the greater current drive capability of the two.
How does an electric utility ground electricity delivered to your home?
Electricity is delivered to homes through transformers. The center of the transformer output winding is connected to ground. This center tap is then connected to the home power panel as the neutral lead. The voltage between the grounded neutral and either of the "hot" legs is half the voltage between the legs. In the US and Canada, the full voltage between the legs is 240V and between either leg and neutral is 120V.
Where do you ground on 100 amp panel?
A typical panel has three large wires entering the main panel from the electric meter and a bare ground wire. Two of the large wires are hot and go to the busses where the breakers are mounted. The third wire is common and is connected to one or more common bus locations. It will usually be silver in color with a screw on top to connect white wires from branch circuits. The ground is the metal of the panel itself and there will be one or more ground busses usually copper colored that are connected to the metal of the panel by screws there by "bonding" these ground busses to the metal of the panel. You should also see a copper wire coming from a ground rod connected to the metal of the panel. At the main panel you need to bond the common to the ground. There is usually a screw that allows this bonding to occur. If you have subpanels ground and common are NOT connected at the subpanels.
What would cause no voltage through the entire car after transmission change?
Forgot to connect ground cable? Shorted Fusable link battery + cable not connected
