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Any two adjacent conductors can be considered a capacitor, although the capacitance will be small unless the conductors are close together for long. This (often unwanted) effect is termed "stray capacitance". Stray capacitance can allow signals to leak between otherwise isolated circuits (an effect called crosstalk), and it can be a limiting factor for proper functioning of circuits at high frequency.
Stray capacitance is often encountered in amplifier circuits in the form of "feedthrough" capacitance that interconnects the input and output nodes (both defined relative to a common ground). It is often convenient for analytical purposes to replace this capacitance with a combination of one input-to-ground capacitance and one output-to-ground capacitance. (The original configuration - including the input-to-output capacitance - is often referred to as a pi-configuration.) Miller's theorem can be used to effect this replacement. Miller's theorem states that, if the gain ratio of two nodes is 1/K, then an impedance of Z connecting the two nodes can be replaced with a Z/(1-k) impedance between the first node and ground and a KZ/(K-1) impedance between the second node and ground. (Since impedance varies inversely with capacitance, the internode capacitance, C, will be seen to have been replaced by a capacitance of KC from input to ground and a capacitance of (K-1)C/K from output to ground.) When the input-to-output gain is very large, the equivalent input-to-ground impedance is very small while the output-to-ground impedance is essentially equal to the original (input-to-output) impedance.
What else can I help you with?
Define capacitance with respect to physical structure and electrical function?
capacitance, in electricity, capability of a body, system, circuit, or device for storing electric charge. Capacitance is expressed as the ratio of stored charge in coulombs to the impressed potential difference in volts. The resulting unit of capacitance is the farad [for Michael Faraday]. In an electric circuit the device designed to store charge is called a capacitor. An ideal capacitor, i.e., one having no resistance or inductance, may be spoken of as a capacitance. When an alternating current flows through a capacitor, the capacitor produces a reactance that resists the current (see impedance). While every element of a circuit has some capacitance, it is a goal of good design to reduce such unwanted or stray capacitance to a minimum.
Why limit of stray light perform in uv calibration and how?
Limit of stray light is important in UV calibration to ensure accurate measurements by reducing interference from unwanted light. This is typically done by using optical components that block or absorb stray light, such as filters or baffles. By minimizing stray light, the calibration process can be more precise and reliable.
Why stray magnetic field in LVDT?
Stray magnetic fields can impact an LVDT by causing interference with the primary and secondary windings, thus affecting the accuracy of the sensor's output. This interference can come from nearby electrical or magnetic devices, poor shielding, or external magnetic sources. Proper shielding and installation techniques can help minimize the impact of stray magnetic fields on an LVDT.
What is stray magnetic field?
Any device that has a motor or transformer generates a strong alternating magnetic field that travels for a good distance. That means any wire near that device can have a AC voltage (stray voltage) induced on it. If that wire eventually gets to an amplifier that stray voltage can be amplified or heard on a speaker or seen as interference on a TV screen. So you have to shield wires that can carry low level signals to prevent this pickup AC voltage. Sometimes even shielding is not enough, and other measures have to be taken.
Is pound an adjective?
No, pound is not an adjective. It can be a noun--a poundof money. It can be a verb, as well--pound on the door.
What is the stray capacitor?
Stray capacitance is undesired capacitance. Any electronic component (wires, resistors, etc.) has SOME capacitance; at high frequencies, this can become significant, becoming a problem for circuit design.
What is the difference between capacitance and stray capacitance?
Capacitance is an ability to store an electric charge. "If we consider two same conductors as capacitor,the capacitance will be small even the conductors are close together for long time." this effect is called Stray Capacitance.
How do you calculate the stray capacitance?
stray capacitance calculation
What is meant by stray capacitance?
ANSWER Stray capacitance is the capacitance in a circuit not caused by capacitor components. There is a small capacitive effect, often on the order of a few picofarads, between leads of ICs, traces on a PCB, wires in a cable, the power and ground planes in a PCB, etc. In high-speed circuits, stray capacitance can be enough to completely change the operation of a circuit -- even to the point of keeping it from working as designed. Note that capacitor "components" can include PCB traces specifically designed to act as capacitors.
Does resistor has stray capacitance?
Yes, all electronic components have both stray capacitance and stray inductance.
What is the value of stray capacitance?
depends on circuit and its construction.
Effects of stray capacitance in ac fan out?
due to the load gates capacitance values,there is a increased load capacitance on the driving gate
How does one reduce stray capacitance?
You can reduce stray capacitance by avoiding having long wires running parallel in circuits. Keep wires as short as possible. Long wires running along each other can exhibit stray capacitance effects. Another way is to cut long leads of components such as capacitors and inductors to make them as short as possible. If best, use SM components, as they have no leads which can cause this stray capacitance effect.
Why ordinary diodes dont work properly At high frequencies?
Because of stray capacitance. At very high frequencies, the inter-electrode capacitance has a low enough impedance that the diode no longer cuts off when reverse-biased, there is still significant conduction via capacitive coupling. High-frequency diodes are constructed so as to minimize this capacitance.
Define capacitance with respect to physical structure and electrical function?
capacitance, in electricity, capability of a body, system, circuit, or device for storing electric charge. Capacitance is expressed as the ratio of stored charge in coulombs to the impressed potential difference in volts. The resulting unit of capacitance is the farad [for Michael Faraday]. In an electric circuit the device designed to store charge is called a capacitor. An ideal capacitor, i.e., one having no resistance or inductance, may be spoken of as a capacitance. When an alternating current flows through a capacitor, the capacitor produces a reactance that resists the current (see impedance). While every element of a circuit has some capacitance, it is a goal of good design to reduce such unwanted or stray capacitance to a minimum.
Does the stray capacitance or the resistance of the monitor cable have the greater effect on the monitor's color?
no
Difference between stray and parasitic capacitance?
Parasitic capacitance is unavoidable and usually unwanted capacity between two or more conductors which exists due to close proximity and which typically causes non-ideal circuit behavior. Stray capacitance, as it is typically thought of, is a type of parasitic capacitance. It is the capacity from a conductor to its surroundings which is the aggregate of the conductors in its environment inversely weighted by the distance to each of the environmental conductors.
