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Topic: Capacitive coupling

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	Plasma Coupling 2
		The capacitive coupling requires a high capacitance between the electrode and the plasma (large amplitude RF voltages).
		Capacitive coupling results in a high energy ion bombardment while the ion bombardment energy is much lower in inductively couples discharges.
		In a capacitive discharge, the periodic electron current flow to the electrode causes a modulation of the plasma potential.
	www.clarycon.com /plasmacoupling2.html (654 words)

	United States Patent: 6,600,339 (Site not responding. Last check: 2007-11-05)
		The capacitive coupling (C) between the transmission lines, 101A and 101B, and the conducting substrate 105 separated by an oxide layer 107 is given as C.congruent.1.66/[ln(4 h/a)] pF/cm.
		The drain region is coupled to a positive voltage supply, the source region is coupled to a lower potential, and the drain region is coupled to the gate of the first transistor.
		Coupling a current sense amplifier to the second end includes coupling a current sense amplifier which has an input impedance Zin that matches the characteristic impedance Zo of the transmission line.
	web.engr.oregonstate.edu /~flf/6600339.html (9039 words)

	Definition: capacitive coupling (Site not responding. Last check: 2007-11-05)
		capacitive coupling: The transfer of energy from one circuit to another by means of the mutual capacitance between the circuits.
		Note 1: The coupling may be deliberate or inadvertent.
		Note 2: Capacitive coupling favors transfer of the higher frequency components of a signal, whereas inductive coupling favors lower frequency components, and conductive coupling favors neither higher nor lower frequency components.
	www.atis.org /tg2k/_capacitive_coupling.html (97 words)

	Method of cleaning high density inductively coupled plasma chamber using capacitive coupling - Patent 5523261
		When using the inductively coupled design it is necessary to eliminate capacitive coupling during the inductive coupling, thereby making it difficult for plasmas to clean the chamber surfaces, since without capacitive coupling efficient cleaning is not possible.
		During cleaning a plasma is generated in the enclosed chamber 20 and an electrical potential is capacitively coupled to the plasma by a capacitor having a first electrode formed in the void 30 and having a second electrode 36 positioned underlying the substrate 5 when the substrate 5 is positioned in the chamber 20.
		Thus the polymer is charged during cleaning to capacitively couple a potential to the cleaning plasma and remains unaffected by the induced voltage during deposition and etching.
	www.freepatentsonline.com /5523261.html (2088 words)

	Single event upset hardened memory cell - US Patent 5905290 (Site not responding. Last check: 2007-11-05)
		a capacitive coupling between the input of said first inverter and the output of said first inverter such that said first resistor isolates said capacitive coupling from the output of said second inverter and said second resistor isolates said capacitive coupling from the input of said second inverter.
		The effectiveness of the capacitance in increasing the critical charge for SEU is increased by having the capacitance from the drain to the gate of the same inverter to get the benefit of the Miller effect.
		The resistance somewhat isolates the gate from the drain of the opposite inverter, resulting in a larger voltage variation on the gate from the capacitive coupling to voltage variation on the gate from the capacitive coupling to voltage variations on the drain of the same inverter.
	www.patentstorm.us /patents/5905290.html (3772 words)

	Input And Output Coupling - Bipolar Junction Transistors
		In this mode, a coupling capacitor is inserted in series with the measured voltage signal to eliminate any vertical offset of the displayed waveform due to DC voltage combined with the signal.
		However, if the stages are capacitively coupled as shown in the above illustration, the biasing of one stage has no effect on the biasing of the next, because DC voltage is blocked from passing on to the next stage.
		One notable exception to this rule is in the case of radio-frequency amplifiers where coupling transformers are typically small, have air cores (making them immune to saturation effects), and can be made part of a resonant circuit so as to block unwanted harmonic frequencies from passing on to subsequent stages.
	www.opamp-electronics.com /tutorials/input_output_coupling_3_04_09.htm (1675 words)

	Geek.com Geek News - Sun details wireless, chip-level interconnect technology
		Capacitive coupling is a very simple concept that takes advantage of the fact that any two wires can form a capacitor.
		Generally, wires and other components are designed specifically to reduce capacitance because capacitance causes a delay in voltage propagation and dissipates heat (the amount of heat is proportional to the frequency of the voltage across the capacitor).
		These capacitive couples are essentially wires designed specifically to form a capacitor with corresponding wires on a nearby chip.
	www.geek.com /news/geeknews/2005Mar/bch20050302029382.htm (1290 words)

	Capacitive Coupling and Data Overflow in the WFD
		Capacitive Coupling and Data Overflow in the WFD
		The PMT signal is AC coupled through a 2.2 uF capacitor in the output of the B.U. Fanout.
		By reducing the capacitance, we cause deliberate sharp positive and negative overshoots that control the discriminator data.
	hep.bu.edu /~macro/wfd/overshoot (2082 words)

	Technical Tidbit - April 2005
		The coupled voltage in the (secondary) conductor is the same polarity as the drop in the primary, but since it is a source instead of a drop, the current direction is reversed.
		Inductive currents may flow in the capacitive coupling as well as along the wire between the loads so simple addition or subtraction of the current probes cannot be used to separate the components of the current.
		Capacitive or inductive coupling can also be used for troubleshooting, allowing one to direct noise currents towards or away from a circuit port, for example.
	www.emcesd.com /tt2005/tt040205.htm (839 words)

	Capacitive - SensorWiki
		Capacitance is inversely proportional to the distance between the plates, varies proportionally with the area of the plates, and is also dependant on the properties of the substance between the plates (the dielectric).
		Capacitive coupling between ambient electric fields and a supply voltage, for example, can result in voltage swings on the power supply voltage.
		A loaded capacitive sensor is one in which a signal is capacitively coupled through an object or performer and the amplitude of the signal received varies with the distance between two "plates" of the capacitor.
	www.sensorwiki.org /index.php?title=Capacitive&redirect=no (606 words)

	Active-type broadband power divider - Patent 5168242
		wherein said distributed capacitive coupling is arranged between the drain line of a first one of said pair of distributed amplifiers and the gate line of a second one of said pair of distributed amplifiers.
		By distributing the capacitive coupling between the gate and/or drain lines of the distributed amplifiers, a constant 90 degree phase shift is obtained over the entire bandwidth of the artificial transmission lines.
		A capacitive coupling 33 is arranged between the drain and gate lines of the first and second amplifiers 30 and 31, and a capacitive coupling 34 is arranged between the drain and gate lines of the second and third amplifiers 31 and 32.
	www.freepatentsonline.com /5168242.html (2184 words)

	EMC Tip 15 - An EMC technique for routing traces on a multilayered printed circuit board
		While mutual coupling can be a problem between adjacent layers, especially when higher currents are involved, the other possibility we have is capacitive coupling between adjacent layers.
		Capacitive coupling is more likely to occur if higher voltages are present and the victim circuit is a high impedance circuit.
		By routing the traces on adjacent layers so the traces on one layer are perpendicular to the traces on an adjacent layer, capacitive coupling is minimized because the overall surface area of traces which can form the "plates" of capacitors are minimized.
	www.intetron.com /EMC_Tip15.htm (419 words)

	LF Isolation Transformer (Site not responding. Last check: 2007-11-05)
		The coupling between the primary and secondary was very tight and the input impedance of one winding at 20 kHz drops to 1 ohm at +50 degrees with the other winding short-circuited.
		Capacitive coupling between the primary and secondary is hard to measure but is about 5000 ohms at –90 degrees from 100 to 200 kHz.
		Further reduction of the coupling could be achieved by introducing a guard electrode with a shield between the two windings that could be connected to an independent ground rod.
	www.amrad.org /projects/lf/isolationxfmr.html (474 words)

	ACData Solutions - Creating Solutions That Matter (Site not responding. Last check: 2007-11-05)
		The capacitance of a given device depends upon the size and shape of the conductors, the distance between them, and the characteristics of the insulator.
		Capacitive Coupling - If an isolated conductor (or other electrical charge, such as lightning) is near to a second conductor, but is separated from it by air or some other insulator, the system forms a capacitor.
		Coupling - The interaction between two circuits which causes energy to be transferred from one to the other.
	www.acdatasystems.com /TechInfoC.html (510 words)

	Capacitively coupled position encoder patent invention
		Sensor circuitry electrically coupled to the tracks and the detection device is structured to generate a first number of bits from a sequential signal pattern applied to the tracks in accordance with an established sequence.
		In one form, this embodiment includes electrical signal circuitry with a noninverting output coupled to the first node and an inverting output coupled to the second node, and an electrode device positioned opposite the face of the sensing device to capacitively couple to the electrodes of the track.
		The third electrode is capacitively coupled to the track to detect a first signal from the first electrode in response to the first waveform and a second signal from the second electrode in response to the second waveform.
	www.freshpatents.com /Capacitively-coupled-position-encoder-dt20061221ptan20060284622.php (1776 words)

	RF amplifier coupling
		For transformers, the term "coupling" refers to the amount of energy transferred from the primary to the secondary of the transformer.
		Coupling is mainly a function of the space between the primary and secondary windings.
		A transformer can be loosely coupled (having little transfer of energy), optimumly coupled (just the right amount of energy transferred), or overcoupled (to the point that the flux lines of primary and secondary windings interfere with each other).
	www.tpub.com /neets/book8/31f.htm (1376 words)

	Capacitive coupling as an adjunctive treatment for avascular necrosis - Wheeless' Textbook of Orthopaedics
		Capacitive coupling as an adjunctive treatment for avascular necrosis
		1990 Dec(261): 11-8 The purpose of this study was to determine the effectiveness of capacitive coupling, a noninvasive method for applying electrical stimulation to biologic tissues, when used as an adjunct to decompression and grafting in the treatment of avascular necrosis (AVN) of the femoral head.
		There was, however, no indication that the addition of capacitive coupling gave better results than decompression and grafting alone.
	www.wheelessonline.com /ortho/capacitive_coupling_as_an_adjunctive_treatment_for_avascular_necrosis (277 words)

	Online Orthopaedics - Electrical Stimulation of Bone Healing
		Capacitive coupling electrical stimulation is indicated for appendicular nonunions and spinal fusions.
		The Orthopak is the capacitive coupling unit indicated for long bone nonunions acquired secondary to trauma.
		The mechanism of action with capacitive coupling is that the low voltage alternating current applied to the site increases the flow of calcium ions into osteoblasts (cells which deposit new bone).
	www.orthopodsurgeon.com /elecstim.html (1073 words)

	[No title]
		Frequently, such couplings are described as “inductive” or “capacitive”, a nomenclature referring to the sign of the coupling impedance type (positive for inductive, negative for capacitive).
		If the coupling between resonators is a resonant circuit, energy passing through the coupling will be phase-shifted and amplitude adjusted, depending on the resonant frequency and magnitude of the coupling.
		Of course, the coupling magnitude and the coupling phase are both affected by adjustment of the coupling resonant frequency.
	www.rsmicro.com /5-97tec.htm (666 words)

	RA EMC Awareness - Mitigation - balanced interconnections
		The crosstalk or external coupling to any cable, whether or not it is twisted pair, has both capacitive and inductive components.
		The equivalent circuit has the capacitive coupling as a current source onto each conductor half-twist while the inductive coupling is a voltage source in series with each conductor, with an opposite sign at each half-twist.
		Balancing the circuit reduces the effect of capacitive coupling, since external interference is coupled equally to both halves of the circuit and is attenuated by its common mode rejection.
	www.ofcom.org.uk /static/archive/ra/topics/research/RAwebPages/Radiocomms/pages/mittech/design/balintcon.htm (704 words)

	Coupling of a sensor elements to a transponder patent invention
		Coupling of a sensor elements to a transponder
		The invention relates to the coupling of a sensor element to a transponder, the connection of said sensor element to the transponder being achieved by capacitive or inductive coupling.
		The output of the sensor element 8 is instead capacitively coupled with the input of the transponder 5 via a coupling capacitor 7, 7'.
	www.freshpatents.com /Coupling-of-a-sensor-elements-to-a-transponder-dt20060824ptan20060186997.php (1331 words)

	Electromagnetic Interference - Siemon
		Capacitive coupling is represented in Figure 2 as a simplified, discrete model of distributed coupling.
		Capacitive coupling occurs between power and tele-communications cables carried in parallel for some extent in a given installation.
		The capacitance between the two lines, referred to in Figure 2 as CPT(Power line to Telecommunications line capacitance), is caused by coupling between these two circuits.
	www.siemon.com /us/white_papers/02-03-22-emi.asp?print=YES (1233 words)

	Adjustable capacitive coupling structure (Site not responding. Last check: 2007-11-05)
		The isolation of the filter can be fine tuned by adjusting the inductive coupling between these resonators, which has the effect of attenuating the cross-coupling effect between these resonators.
		wherein first and second resonators, of said plurality of resonators, are coupled to each other by both an adjustable inductive coupler and a capacitive cross-coupler.
		The cavity filter of claim 6 wherein the electrical conductor is a screw threadedly engaged in the filter housing.
	www.kapere.com /836/adjustable_capacitive_coupling_structure_6836198.html (536 words)

	Rust (Site not responding. Last check: 2007-11-05)
		These capacitive couplers, which are attached to the painted metal surface with aircraft grade adhesive, are charged by the power supply/control module and function as if they were the positive half of a capacitor.
		These capacitive couplers are vital to the effectiveness of the system and we exercise the utmost care in their manufacture.
		Together these two components serve to induce a negative electrostatic surface charge on the metal surface being protected (your vehicle's body for instance) thus capacitive coupling treats the metal body as if it were the negative half of a capacitor.
	www.geebungautomotive.com.au /Rust.htm (459 words)

	Official Site of Pritchard Amps
		There are two types of lead dress problems, capacitive and inductive, and both can cause the amplifier to behave strangely even if it does not oscillate from the unwanted feedback.
		Capacitive coupling occurs when the grid wires are too close to plate wires of later stages, i.e.
		As a consequence, XGPA technology reduces the effect of any particular source of capacitive coupling by a factor the same factor of 10 and neatly overcoming the printed circuit board’s factor of three increase.
	www.pritchardamps.com /pcb.cfm (500 words)

	Encision Electrosurgery - AEM®Laparoscopic Instruments
		Stray energy burns are primarily caused by insulation failure and capacitive coupling.
		Capacitive coupling occurs when electrical current is induced from the active electrode to nearby conductive material through intact insulation.
		The potential for capacitive coupling to occur is always present in monopolar electrosurgery.
	www.encision.com /tech.html (443 words)

	EMC Compliance Club
		In reference [1] it was explained that an extended capacitive coupling to a cable behaves as a resonant co-axial transmission line.
		In the picture, the cable reel is upon a table to reduce its capacitance to ground, but this was subsequently found not to be necessary because of the isolation provided by the multi-ferrite.
		At this frequency both capacitive and inductive impedances are both quite high and so this resonance was easily removed by a 3.3Kilohm resistor from cable shield to ground at the AE connection of the CDN.
	www.compliance-club.com /archive/article.asp?artid=153 (3263 words)

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