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When switch is off of power supply output shown on the multimeter is negative voltage from power supply?
Wiki User
∙ 8y ago
Yes.
Wiki User
∙ 8y ago
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Why is dual supply used for op-amp?
Dual supply arrangement allows for the output voltage to swing both above and below zero volts, and also gives an output of 0V when there is no voltage difference between the two inputs. An op amp can only amplify a signal to its values in the supplied range. If you want to amplify a signal with negative values then you need a negative supply.
What digital multimeter scale should be used when testing the signal from a Hall-effect switch?
You should use the scale that shows correctly your supply voltage. Most Hall-effect switches provide either a logical output or an open-collector output. If the output is logical, you can expect the value to be between 0 and your supply voltage. If the output is open-collector, you must bias the output to your supply voltage with a resistor; otherwise you will always read "0". If biased, the output will be between 0 and the voltage bias. If you are not certain of which type you have, try finding the datasheet on the Internet; otherwise, you can always bias the output to your supply voltage; if you properly choose the resistor, it should not adversely affect the behaviour of the logical-level output. I would suggest trying 1 kOhm with a 5 V supply; this gives a bias current of 5 mA, which most Hall-effect sensors should be able to cope with. There are other Hall-effect sensors that provide linear output, but this answer is about a Hall-effect switch.
Which voltages are supported by a Toshiba power supply?
The input voltage range for the Toshiba power supply is AC 100V - 240V. The output voltage is DC 19V / output current is 4.74A. This power supply comes with a power cord and packaging will state voltage recommended for the product.
Why negative supply is more prefer then positive supply?
A: actually it is the other way around usually negative voltage is a biasing scheme. Most design are begun with a positive voltage in mind. Not that a negative voltage will not work it is just people think positive
Methods of calculating Ripple voltage in supply without using oscilloscope?
Measure AC voltage with multimeter. It is easiest way to check how big ripple is. There is no way to 'calculate' value.
Can the power supply provide a negative voltage output?
Yes. Depending on the design, the power supply can provide any voltage desired.
You suspect that a power supply is faulty but you use a multimeter to measure its voltage output and find it to be acceptable Why is it still possible that the power supply may be faulty?
Yes, it can be faulty. Some damaged power supplies show good output voltages on the voltage range of a multimeter but, when you connect them, they don't work properly. One possible reason is that maybe an IC in its voltage regulator has a high resistance between the common and the output. You cannot see this by shunting a voltmeter onto it. You have to place a typical load onto the output to test it.
Which multimeter setting to test power supply of a computer?
That depends on what you're testing it for. You would mostly use the volt meter settings to test for proper voltage output at the connectors coming out of the power supply. After verifying the expected volt output from a suspect connector, You should, in case you are wrong or a short is present, start with the highest voltage AC settings first and then reduce to lower settings and DC to confirm proper outputs.
Why is dual supply used for op-amp?
Dual supply arrangement allows for the output voltage to swing both above and below zero volts, and also gives an output of 0V when there is no voltage difference between the two inputs. An op amp can only amplify a signal to its values in the supplied range. If you want to amplify a signal with negative values then you need a negative supply.
What is the meaning of rail to rail in semiconductors?
wrong answer. the answer is Blah BLAH BLAH! Indeed. Simplified for mere mortals, that means: The output voltage can range all the way from the positive supply voltage to the negative supply voltage without exceeding it's distortion specification.
What tool can you use to troubleshoot power supply issues measure current resistance or voltage?
multimeter
What digital multimeter scale should be used when testing the signal from a Hall-effect switch?
You should use the scale that shows correctly your supply voltage. Most Hall-effect switches provide either a logical output or an open-collector output. If the output is logical, you can expect the value to be between 0 and your supply voltage. If the output is open-collector, you must bias the output to your supply voltage with a resistor; otherwise you will always read "0". If biased, the output will be between 0 and the voltage bias. If you are not certain of which type you have, try finding the datasheet on the Internet; otherwise, you can always bias the output to your supply voltage; if you properly choose the resistor, it should not adversely affect the behaviour of the logical-level output. I would suggest trying 1 kOhm with a 5 V supply; this gives a bias current of 5 mA, which most Hall-effect sensors should be able to cope with. There are other Hall-effect sensors that provide linear output, but this answer is about a Hall-effect switch.
What happen if the value of the dc supply is changed in amplitude modulation?
The rf output voltage should be proportional to the signal voltage in AM. A change in the DC supply voltage should also cause a proportional change to the rf output voltage.
Why we don't get negative half cycle in rectifier outpus?
We don't get negative half cycles at a rectifier's output only in a positive supply.If the supply is for a negative voltage, then there will be no positive half cycles at the output.Read a bit more about rectification.We don't get negative half cycle in rectifier outputs because the negative part of the supply only shows up across the diode when it is in the reverse bias and blocked (acting like an open switch) there by making the output voltage zero at that instant.
Why clipping happen for op-amp?
Clipping occurs in the voltage waveform when the input voltage, multiplied by the voltage gain of the op-amp circuit, exceeds the op-amp supply voltage as limited by the output network. The supply voltage and output network, limits the maximum voltage that can be achieved at the output. The op-amp behaves normally within its range of maximum voltage output, and then it is clipped when it reaches the maximum voltage of the circuit.
What is an output voltage swing?
Output voltage swing is defined as the maximum positive or negative peak output voltage that can be obtained without wave form clipping, when quiescent DC output voltage is zero. VOM is limited by the output impedance of the amplifier, the saturation voltage of the output transistors, and the power supply voltages. This is depicted in the figure above. This emitter follower structure cannot drive the output voltage to either rail. Rail-to-rail output op amps use a common emitter (bipolar) or common source (CMOS) output stage. With these structures, the output voltage swing is only limited by the saturation voltage (bipolar) or the on resistance (CMOS) of the output transistors, and the load being driven.Maximum and minimum output voltage is usually a design issue when dynamic range is lost if the op amp cannot drive to the rails. This is the case in single supply systems where the op amp is used to drive the input of an ADC, which is configured for full scale input voltage between ground and the positive rail. Because newer products are focused on single supply operation, datasheets use the terminology VOH and VOL to specify the maximum and minimum output voltage.
What to do if the power supply is too low?
Obtain a power supply that has the correct output voltage that you need.
