ELEC 225L Circuit Theory I Laboratory Fall 2010
... of the RLC circuit has a negative imaginary part; the capacitance is not equal to C in the circuit. c) Equivalent circuit representation when the operating frequency is above resonance. The inductor symbol indicates that the total impedance of the RLC circuit has a positive imaginary part; the induc ...
... of the RLC circuit has a negative imaginary part; the capacitance is not equal to C in the circuit. c) Equivalent circuit representation when the operating frequency is above resonance. The inductor symbol indicates that the total impedance of the RLC circuit has a positive imaginary part; the induc ...
Alternating Current Electricity
... when the current is changing most rapidly, which is when it is passing through zero. When the current has reached it’s max, it is not changing as rapidly so there is no back e.m.f The phasor diagram will look like: ...
... when the current is changing most rapidly, which is when it is passing through zero. When the current has reached it’s max, it is not changing as rapidly so there is no back e.m.f The phasor diagram will look like: ...
G3A01 What is the sunspot number?
... G4A02 What is one advantage of selecting the opposite or "reverse" sideband when receiving CW signals on a typical HF transceiver? A. Interference from impulse noise will be eliminated B. More stations can be accommodated within a given signal passband C. It may be possible to reduce or eliminate i ...
... G4A02 What is one advantage of selecting the opposite or "reverse" sideband when receiving CW signals on a typical HF transceiver? A. Interference from impulse noise will be eliminated B. More stations can be accommodated within a given signal passband C. It may be possible to reduce or eliminate i ...
G4 - K5FRC
... G4A02 What is one advantage of selecting the opposite or "reverse" sideband when receiving CW signals on a typical HF transceiver? A. Interference from impulse noise will be eliminated B. More stations can be accommodated within a given signal passband C. It may be possible to reduce or eliminate i ...
... G4A02 What is one advantage of selecting the opposite or "reverse" sideband when receiving CW signals on a typical HF transceiver? A. Interference from impulse noise will be eliminated B. More stations can be accommodated within a given signal passband C. It may be possible to reduce or eliminate i ...
University of California at Berkeley College of Engineering
... Reflections are a big problem in transmission lines. Signals traveling along a transmission line can reflect at the end of a wire and interfere constructively, causing large voltage spikes. When a transmission line is short, reflection does not play a major role. However, when the line is sufficient ...
... Reflections are a big problem in transmission lines. Signals traveling along a transmission line can reflect at the end of a wire and interfere constructively, causing large voltage spikes. When a transmission line is short, reflection does not play a major role. However, when the line is sufficient ...
Analog Sensors for Motion Measurement
... • Torque/Force sensors • Piezoelectric materials deform when a voltage is applied. Applications include • Piezoelectric valves • Microactuators and MEMS ...
... • Torque/Force sensors • Piezoelectric materials deform when a voltage is applied. Applications include • Piezoelectric valves • Microactuators and MEMS ...
guiding microwaves along a Lecher line
... field. Corresponding to the voltage between the wires, a charge distribution arises along the wires, whose displacement leads to a current I through the wires, which propagates like a wave. ...
... field. Corresponding to the voltage between the wires, a charge distribution arises along the wires, whose displacement leads to a current I through the wires, which propagates like a wave. ...
Electrical circuits wyklad 3
... voltage. If the circuit contain only independent sources to do it we remove all sources in the original circuit (voltage sources shorted and current sources open) and calculate total resistance between the open connection points. If the circuit contain dependent sources we need to calculate resistan ...
... voltage. If the circuit contain only independent sources to do it we remove all sources in the original circuit (voltage sources shorted and current sources open) and calculate total resistance between the open connection points. If the circuit contain dependent sources we need to calculate resistan ...
Standing wave ratio
In radio engineering and telecommunications, standing wave ratio (SWR) is a measure of impedance matching of loads to the characteristic impedance of a transmission line or waveguide. Impedance mismatches result in standing waves along the transmission line, and SWR is defined as the ratio of the partial standing wave's amplitude at an antinode (maximum) to the amplitude at a node (minimum) along the line.The SWR is usually thought of in terms of the maximum and minimum AC voltages along the transmission line, thus called the voltage standing wave ratio or VSWR (sometimes pronounced ""viswar""). For example, the VSWR value 1.2:1 denotes an AC voltage due to standing waves along the transmission line reaching a peak value 1.2 times that of the minimum AC voltage along that line. The SWR can as well be defined as the ratio of the maximum amplitude to minimum amplitude of the transmission line's currents, electric field strength, or the magnetic field strength. Neglecting transmission line loss, these ratios are identical.The power standing wave ratio (PSWR) is defined as the square of the VSWR, however this terminology has no physical relation to actual powers involved in transmission.The SWR can be measured with an instrument called an SWR meter. Since SWR is defined relative to the transmission line's characteristic impedance, the SWR meter must be constructed for that impedance; in practice most transmission lines used in these applications are coaxial cables with an impedance of either 50 or 75 ohms. Checking the SWR is a standard procedure in a radio station, for instance, to verify impedance matching of the antenna to the transmission line (and transmitter). Unlike connecting an impedance analyzer (or ""impedance bridge"") directly to the antenna (or other load), the SWR does not measure the actual impedance of the load, but quantifies the magnitude of the impedance mismatch just performing a measurement on the transmitter side of the transmission line.