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Topic: LC circuit

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	3
		The LC resonant circuit is coupled magnetically with an external antenna coil.
		The resonance frequency of the circuit increases as the applied pressure decreases the capacitance of the sensor.
		LC °øÁøÀ» ÀÌ¿ëÇÏ¿© °í¿Â, °í¾Ð¿¡¼ ÃøÁ¤ÀÌ °¡´ÉÇÔÀ» º¸ÀÎ ¼¾¼µµ ÀÖ´Ù[3].
	wwwold.ajou.ac.kr /~mems/proj-PRESS2.htm (588 words)

	LC circuit Summary
		LC circuits behave as electronic resonators, which are a key component in many applications such as oscillators, filters, tuners and frequency mixers.
		An LC circuit consists of an inductor and a capacitor.
		LC circuits are often used as filters; the L/C ratio determines their selectivity.
	www.bookrags.com /LC_circuit (952 words)

	Series resonant inductive charging circuit - Patent 6972543
		An apparatus to charge a power supply inductively, with increased efficiency due to resonance, comprises an LC series resonance circuit formed by a capacitor and a primary inductive coil coupled in series with the capacitor, and a secondary inductive coil positioned such that power is inductively transferred from the primary coil to the secondary coil.
		The LC circuit has a natural resonant frequency, wherein the primary coil of the resonance circuit is coupled to receive power from a source oscillating at the natural resonant frequency.
		The LC circuit 160 is designed to have a natural resonant frequency substantially equal to the frequency at which the AC voltage source 100 oscillates.
	www.freepatentsonline.com /6972543.html (2095 words)

	Multilayer LC filter with improved magnetic coupling characteristics - Patent 6791435
		Two LC resonance circuits 1 and 2, in a two-stage circuit configuration, are connected across the three capacitors C with both of the circuits 1 and 2 being grounded.
		The LC resonance circuit 1 on the side of the input terminal 3 comprises a resonator capacitor C1 and a resonator inductor L1, and the LC resonator circuit 2 on the side of the output terminal 4 comprises a resonator capacitor C2 and a resonator inductor L2.
		The first LC resonance circuit 21 is connected on the side of the input terminal 11, the second LC resonance circuit 22 is connected on the side of the output terminal 12, and each of the LC resonance circuits 21 and 22 are grounded.
	www.freepatentsonline.com /6791435.html (2729 words)

	Experiments with LC circuits
		The coupling coil is placed on the same height near the coil of the LC circuit.
		Because the LC circuit is now at some height above the wooden table, I hope to get a higher circuit Q. In the following measurement, the effect is measured of the aluminium under the test setup and the aluminium on the amplifier box.
		Now the distance between the coupling coil and the coil of the LC circuit is varied, and the Q's measured.
	www.crystal-radio.eu /enlctest6.htm (622 words)

	LC Circuits
		An LC circuit is therefore an oscillating circuit.
		An audio crossover circuit consisting of three LC circuits, each tuned to a different natural frequency is shown to the right.
		On the left a "woofer" circuit tuned to a low audio frequency, on the right a "tweeter" circuit tuned to a high audio frequency, and in between a "midrange" circuit tuned to a frequency in the middle of the audio spectrum.
	hypertextbook.com /physics/electricity/circuits-rlc (251 words)

	Model Railroad and Misc. Electronics
		Two circuit breaker designs are shown; The first has its power isolation device on the Low or common side of the circuit while the second has it isolation device on the High or supply side of the circuit.
		The replacement circuit uses discrete components and is essentially the same as the internal circuit of the LM3909.
		The Circuit is for a 'Shunt' type ammeter that allows a meter movement with a small current rating to be used to measure a much larger current.
	home.cogeco.ca /~rpaisley4/CircuitIndex.html (3837 words)

	LC circuits (Site not responding. Last check: )
		An LC circuit is simply a closed loop with only two elements, a capacitor and an inductor.
		The parameters that determine the behavior of an LC circuit are L, C, Q and I which is the rate of change of Q.
		The characteristic frequency of and LC circuit is the frequency at which large amplitudes are built up when a driving force comes in at that frequency.
	www.pa.msu.edu /courses/1998spring/PHY232/lectures/accircuits/lccircuits.html (242 words)

	Measuring the Q of LC circuits
		Set the generator to the frequency at which you want to measure the Q. Adjust the LC circuit (turn the tuner capacitor) so you have maximum voltage over the circuit, the circuit is now in resonance, this frequency is the resonance frequency of the circuit (f.res).
		The coil of the LC circuit is placed at the top of a wooden stick, so it has not much influence from surrounding obstacles.
		Don't lay the coil of the LC circuit during measurement on the table, but keep a minimum distance of 20 cm from wooden or metal objects.
	home.hetnet.nl /~dick-kleijer/enqmeting.htm (1239 words)

	Drifter :: RLC circuit
		An RLC circuit (also known as a resonant circuit or a tuned circuit) is an electrical circuit consisting of a resistor (R), an inductor (L), and a capacitor (C), connected in series or in parallel.
		In practice, this requires decreasing the resistance R in the circuit to as small as physically possible for a series circuit, and increasing R to as large a value as possible for a parallel circuit.
		In this circuit, the three components are all in series with the voltage source.
	colabbong.enterhost.co.kr /tt?page=8 (1234 words)

	[No title]
		Assembly of the LC circuit and the "exciter" circuit.
		This circuit subsequently oscillates electrically, with the oscillations gradually decreasing in magnitude as the electrical energy within the circuit is dissipated, principally by the resistance of the circuit.
		Since the resistance of the LC circuit is due principally to the resistance of the wire of the inductor, it is difficult to reduce this quantity.
	www.public.iastate.edu /~fcp/22e7.doc (5636 words)

	UM Physics Demonstration
		The demonstration of resonance is done using the same equipment with both the inductor and capacitor in place to form a series LC circuit.
		To show the voltage across the LC circuit along with the current through it, use the connection between the resistor and the LC circuit as common and connect one probe to the other side of the resistor and the other to the other side of the LC circuit.
		The voltage across the LC circuit goes to zero at resonance, and since the capacitive reactance is higher than the inductive reactance at frequencies below resonance, the current leads the voltage at frequencies above the resonant frequency.
	www.physics.lsa.umich.edu /demolab/demo.asp?id=382 (257 words)

	Lessons In Electric Circuits -- Volume II (AC) - Chapter 6
		If the power supply frequency for a circuit exactly matches the natural frequency of the circuit's LC combination, the circuit is said to be in a state of resonance.
		A resonant circuit can be used to “block” (present high impedance toward) a frequency or range of frequencies, thus acting as a sort of frequency “filter” to strain certain frequencies out of a mix of others.
		A parallel resonant circuit is resistive at the resonant frequency.
	www.ibiblio.org /obp/electricCircuits/AC/AC_6.html (5389 words)

	Resonance in Series-Parallel Circuits - Resonance
		In a parallel (tank) LC circuit, this means infinite impedance at resonance.
		One notable exception to the rule of circuit resistance causing a resonant frequency shift is the case of series resistor-inductor-capacitor ("RLC") circuits.
		Note that the peak of the current graph has not changed from the earlier series LC circuit (the one with the 1 Ω token resistance in it), even though the resistance is now 100 times greater.
	www.opamp-electronics.com /tutorials/resonance_in_series_parallel_circuits_2_06_05.htm (1938 words)

	[muRata] Ceramic Resonators ("CERALOCK") Information
		The oscillation frequency of the Colpitts and Hartley circuit is approximately the same as the resonant frequency of the circuit comprised of L, C
		To use the "CERALOCK" in the LC circuit, replace "L" of the LC circuit with the "CERALOCK" by utilizing the inductance between "fr" and "fa." Generally, the "CERALOCK" is replaced with "L" of the Colpitts circuit.
		The Colpitts circuit uses an inverting amplifier (theta1=180°), and also uses "L" and "C" in the feedback circuit for further inversion (theta2=180°).
	www.murata.com /ceralock/base04.html (219 words)

	LC Oscillators
		When the LC circuit's postive charge is at it's maximum, the charge will balance with the grid capacitor, causing plate current to flow because there is no negative on the grid.
		The difference between the Armstrong oscillator and the Hartley oscillator is that the tickler coil is part of the LC circuit.
		The LC circuit is the electricial equilavent of a crystal.
	www.electronixandmore.com /articles/oscillators.html (1219 words)

	Electromagnetic oscillating circuit
		This simulation deals with an electromagnetic oscillating circuit, consisting of a capacitor (center) and an inductor (i.e.
		As soon as you have pressed the "Reset" button, the plates of the capacitor will be charged, namely the upper plate positively and the lower plate negatively.
		The electric field of the capacitor (red) and the magnetic field of the inductor (blue) are indicated by field lines in the circuit diagram.
	www.walter-fendt.de /ph11e/osccirc.htm (269 words)

	Tuned LC circuits
		The Q of a LC circuit will decrease when we connect a antenna or detector to it, this is because the antenna or detector gives extra parallel resistance to the circuit.
		So, the impedance is not infinite, but has a certain value, it looks like there is a resistor connected parallel to the LC circuit, this we call the parallelresistance of the circuit "Rp".
		The Q factor of a unloaded LC circuit is determined by the following factors: series resistance in the circuit, parallel resistance across the circuit and magnetic losses.
	home.hetnet.nl /~dick-kleijer/enlckring.htm (1223 words)

	Oscillators - Square Wave
		This circuit is similar to number 119 but adds even more inverters in parallel to deliver yet more power.
		The circuit gates the output of a continuously operating 32KHz crystal oscillator to the input of a C-MOS buffer when clock pulses are needed.
		However, this circuit uses several tens of microamperes because of the voltage transitions at the Schmitt trigger's input.
	www.discovercircuits.com /O/o-sqwave.htm (1006 words)

	Waveform Generators Electronic Circuits or Schematics - sine, square, triangle, etc Page 4
		LC Oscillator has 1% THD: 03/31/94 EDN-Design Ideas / (added 03/03) At the heart of many oscillators is a parallel-resonant LC tank circuit whose impedance is infinite at the resonant frequency of 1/2[pi]ÖLC Hz.
		Also, the circuit does not require that you adjust several trimming resistors just to tune the oscillator to a given frequency.
		Because an op amp is a complete amplifier with a high-impedance input and a low-impedance output, it considerably simplifies the circuit design by replacing the traditional multiple-transistor circuit with its interstage transformer and numerous other components.
	www.discovercircuits.com /W/waveforms4.htm (980 words)

	General Electronics
		Coax Tune A Coaxial Line Used as a Tuned Circuit At HF and above, with a short circuit at one end, a 1/4-wavelength coaxial line can be used as a tuned circuit with a fairly high Q. With a variable capacitor across the open end an adjustable parallel tuned circuit results...
		The circuit may also be used as a preselector in front of an untuned receiver.
		The collector load is either a resistor or an LC circuit tuned to a particular harmonic...
	www.smeter.net /electronics/electronics.php (603 words)

	EYE TRACKING from LC Technologies, Inc
		From video games and marketing research, to studies that measure mental alertness and fitness for duty, to using our eyes to control a computer mouse or a remote camera, EYETRACKING is the precursor of tomorrow’s technological advances.
		LC Technologies, Inc. has developed a unique Eyetracking Technology that is both an eye-operated computer for control and communication, and a device for monitoring and recording eye motion and related eye data.
		Now, as the technology reaches a new level of sophistication, the research and development team at LC Technologies, Inc. is working to move eyetracking into the mainstream and expand the horizon of human/machine interaction.
	www.eyegaze.com (268 words)

	AC CIRCUITS
		Since the total voltage drop across the circuit elements must be equal to the applied emf, we conclude that the phase angle between the current and the emf is +/- 90 degrees.
		Applying Kirchhoff's second rule to the primary circuit, we conclude that the induced emf in the coil must be equal to the applied emf.
		If the secondary circuit is open, no current will flow in it, and the primary circuit is nothing else than a single-loop circuit with an alternating source of emf and an inductor.
	teacher.nsrl.rochester.edu /phy122/LectureNotes/Chapter34/chapter34.html (2471 words)

	TFCBooks -- Tesla Site Glossary
		An LC circuit exhibits resonance at a specific frequency which is determined by the value of the inductor and the capacitor.
		The current in a circuit is directly proportional to the voltage and inversely proportional to the resistance.
		A phase-locked loop (PLL) is an electronic circuit with a voltage- or current-driven oscillator that is constantly adjusted to match in phase (and thus lock on) the frequency of an input signal.
	www.tfcbooks.com /mainpage/glossary.htm (11871 words)

	LC circuit - Wikipedia, the free encyclopedia
		An LC circuit consists of an inductor, (represented by the letter L), and a capacitor (represented by the letter C).
		LC circuits are key components in many applications such as oscillators, filters, tuners and frequency mixers.
		LC circuits are often used as filters; the L/C ratio determines their selectivity.
	en.wikipedia.org /wiki/LC_circuit (763 words)

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