Contents
What is a voltage error?
[′er·ər ‚vōl·tij] (electricity) A voltage, usually obtained from a selsyn, that is proportional to the difference between the angular positions of the input and output shafts of a servosystem; this voltage acts on the system to produce a motion that tends to reduce the error in position.
What is the common-mode voltage gain?
Common-mode voltage gain refers to the amplification given to signals that appear on both inputs relative to the common (typically ground). This means the output is unaffected by voltages that are common to both inputs (i.e., no difference). Figure 1.13 further illustrates the measurement of common-mode voltage gains.
What affects output voltage?
There are several factors that contribute to output voltage error due to the internal IC and external resistance. Factors within the IC include input offset voltage, input bias current, and input offset current.
What is electrical output?
Input refers to the amount of energy put into a device, and output refers to the amount of energy that comes out. A device may change the type of energy but not the amount. For example, a light bulb’s input energy is the form of electrical energy, and its output energy is in the form of light and heat.
What causes an error in input offset voltage?
The error contributed by input offset voltage is a result of DC imbalances within the op amp. The transistor currents (see Figure 10.1) in the input stage may not be exactly equal because of component tolerances within the integrated circuit.
What is the meaning of output voltage and…?
Meanwhile your DC supplies 5V @ 1.5A or 7.5W but you don’t say what the voltage load regulation error is. Let’s say it is 1% or 50mV . This would suggest the regulator output impedance is 50mV/1.5A= 33 milliohms . Any questions. So what did you learn? P max = I max @ Vout.
How are error voltages related to power supply rejection?
Power supply rejection is similar to CMRR but relates to error voltages referred to the input as a result of changes in the power rail voltages. As before, a PSRR of 80 dB with a rail voltage change of 1 V would result in an equivalent input error of 100 μV.
How can output error be reduced in a circuit?
Output error can be further reduced by choosing lower R F and R G which, in turn, increase the circuit’s power dissipation. A careful trade-off between output error and power dissipation needs to be maintained when choosing the size of resistances.