3. Diode, Rectifiers, and Power Supplies
... are used in a wide variety of applications in communication systems (limiters, gates, clippers, mixers), computers (clamps, clippers, logic gates), radar circuits (phase detectors, gain-control circuits, power detectors, parameter amplifiers), radios (mixers, automatic gain control circuits, message ...
... are used in a wide variety of applications in communication systems (limiters, gates, clippers, mixers), computers (clamps, clippers, logic gates), radar circuits (phase detectors, gain-control circuits, power detectors, parameter amplifiers), radios (mixers, automatic gain control circuits, message ...
Power Factor Correction Module
... SynQor PFCQor module, an energy storage hold-up capacitor and one or more SynQor DC-DC converters, depending on how many output voltages are required. Fuses are needed in various places to meet safety requirements. The primary purpose of the PFCQor is to shape the input current that is drawn from a ...
... SynQor PFCQor module, an energy storage hold-up capacitor and one or more SynQor DC-DC converters, depending on how many output voltages are required. Fuses are needed in various places to meet safety requirements. The primary purpose of the PFCQor is to shape the input current that is drawn from a ...
Digital Control of Boost PFC Converters Operating in both
... range (< 250W). Therefore, many power factor correction converters for the higher power range are operated in the continuous conduction mode (CCM). One of the most popular topologies is that of the boost PFC converter, see Fig. 1. Since a lot of research on the control of these converters has been p ...
... range (< 250W). Therefore, many power factor correction converters for the higher power range are operated in the continuous conduction mode (CCM). One of the most popular topologies is that of the boost PFC converter, see Fig. 1. Since a lot of research on the control of these converters has been p ...
3 Calculation of Short-Circuit Currents in Three
... Positive-sequence short-circuit impedance Z(1) of a three-phase a.c. system: the impedance in the positive-phase-sequence system as viewed from the fault location. Negative-sequence short-circuit impedance Z(2) of a three-phase a.c. system: the impedance in the negative-phase-sequence system as view ...
... Positive-sequence short-circuit impedance Z(1) of a three-phase a.c. system: the impedance in the positive-phase-sequence system as viewed from the fault location. Negative-sequence short-circuit impedance Z(2) of a three-phase a.c. system: the impedance in the negative-phase-sequence system as view ...
Inverting and non-inverting amplifier
... An operational amplifier or op-amp is a linear integrated circuit that has a very high voltage gain, high input impedance and low output impedance. Op-amp is basically a differential amplifier whose basic function is to amplify the difference between two input signals. Op-amp has five basic terminal ...
... An operational amplifier or op-amp is a linear integrated circuit that has a very high voltage gain, high input impedance and low output impedance. Op-amp is basically a differential amplifier whose basic function is to amplify the difference between two input signals. Op-amp has five basic terminal ...
Specifying high voltage film resistors
... typical operating range of ±50C would result in a resistance shift of ± 2.5percent f rom the + 25C reference value. The temperature coefficients used in precision designs should be less than 100ppm/C. Even at 100ppm/ C, the resistance can vary as much as ±0.5percent over a 50C range. Precision high ...
... typical operating range of ±50C would result in a resistance shift of ± 2.5percent f rom the + 25C reference value. The temperature coefficients used in precision designs should be less than 100ppm/C. Even at 100ppm/ C, the resistance can vary as much as ±0.5percent over a 50C range. Precision high ...
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.