CosmicRay Instrumentation in the First U. S. Earth Satellite
... emitter test circuit consisting of a lO-kohm collector resistor in series with a microammeter and twenty volt battery, and a lO-kohm base resistor in series with a 0.5 v reverse biasing battery, it was required that the collector current be less than 0.1 p.a. It was also required that the beta be gr ...
... emitter test circuit consisting of a lO-kohm collector resistor in series with a microammeter and twenty volt battery, and a lO-kohm base resistor in series with a 0.5 v reverse biasing battery, it was required that the collector current be less than 0.1 p.a. It was also required that the beta be gr ...
Voltage-controlled Oscillators (VCO), Phase Locked Loop, and
... Voltage-controlled Oscillators (VCO), Phase Locked Loop, and Frequency Converters Voltage-controlled oscillators are specialized oscillators in which the oscillation frequency varies with a control voltage. VCOs are used in many communication applications such as frequency modulation, in the phase l ...
... Voltage-controlled Oscillators (VCO), Phase Locked Loop, and Frequency Converters Voltage-controlled oscillators are specialized oscillators in which the oscillation frequency varies with a control voltage. VCOs are used in many communication applications such as frequency modulation, in the phase l ...
Synchronous close capacitor bank switching made easy
... • Best in class C2 re-strike free • Long life vacuum interrupter with solid-dielectric insulation for maintenance-free switching • Eliminate the material cost and space required for inrush reactors • Mitigate harmonics and switching disturbances that occur in back-to-back capacitor bank switchin ...
... • Best in class C2 re-strike free • Long life vacuum interrupter with solid-dielectric insulation for maintenance-free switching • Eliminate the material cost and space required for inrush reactors • Mitigate harmonics and switching disturbances that occur in back-to-back capacitor bank switchin ...
Cosmic rays seen with a sparkchamber
... rence at the moment a particle passed the plates. One realized quickly that with the use of metal electrodes, which were mounted parallel to each other, the trajectory of a particle could be made visible in a spectacular way. And even more important was the fact that more particles could be detected ...
... rence at the moment a particle passed the plates. One realized quickly that with the use of metal electrodes, which were mounted parallel to each other, the trajectory of a particle could be made visible in a spectacular way. And even more important was the fact that more particles could be detected ...
Principles of Electronic Communication Systems
... square-wave current in a tuned circuit. In a class E amplifier only a single transistor is used. This amplifier uses a low-pass filter and tuned impedance-matching circuit that achieves a high level of efficiency. A class F amplifier is a variation of the E amplifier. It contains an additional reson ...
... square-wave current in a tuned circuit. In a class E amplifier only a single transistor is used. This amplifier uses a low-pass filter and tuned impedance-matching circuit that achieves a high level of efficiency. A class F amplifier is a variation of the E amplifier. It contains an additional reson ...
Product Sheet LNK-P5Y-300-400
... Series resistance (mΩ): 0,45 Thermal resistance with natural cooling (°C/W): ...
... Series resistance (mΩ): 0,45 Thermal resistance with natural cooling (°C/W): ...
UMZ-837-D16-G 数据资料DataSheet下载
... [1] Frequency drift: 21MHz typical, 25MHz maximum (either extreme) ...
... [1] Frequency drift: 21MHz typical, 25MHz maximum (either extreme) ...
7782 and 7782HC SPECIFICATION SHEET
... provide 40mSec bursts up to 150Apk. For greater voltage or current, units can be combined in parallel or series to create arrays of amplifiers capable of pulses in excess of 500Vpk and 600Apk. The 7782 can operate in either voltage or current operation modes. It is useful for a wide variety of EMC p ...
... provide 40mSec bursts up to 150Apk. For greater voltage or current, units can be combined in parallel or series to create arrays of amplifiers capable of pulses in excess of 500Vpk and 600Apk. The 7782 can operate in either voltage or current operation modes. It is useful for a wide variety of EMC p ...
P517/617 Lec2, P1 1) Capacitance: C
... Thus at high frequencies an inductor looks like an open circuit, while at low frequencies an inductor looks like a short circuit (low resistance). •Some things to remember about R, L, and C's. For DC circuits, after many time constants (L/R or RC): Inductor acts like a wire (0 W). Capacitor acts lik ...
... Thus at high frequencies an inductor looks like an open circuit, while at low frequencies an inductor looks like a short circuit (low resistance). •Some things to remember about R, L, and C's. For DC circuits, after many time constants (L/R or RC): Inductor acts like a wire (0 W). Capacitor acts lik ...
Voltage balancing resistors
... distributed evenly across the capacitors. This does not always occur as intended due to the variations in the leakage currents of the capacitors. The variations in leakage current can lead to some of the capacitors having voltages across them that could exceed their voltage ratings. Exceeding the vo ...
... distributed evenly across the capacitors. This does not always occur as intended due to the variations in the leakage currents of the capacitors. The variations in leakage current can lead to some of the capacitors having voltages across them that could exceed their voltage ratings. Exceeding the vo ...
Technical Teaching Equipment
... ESL-SOF is the application addressed to the Students that helps them to understand theoretical concepts by means of practical exercises and to prove their knowledge and progression by performing tests and calculations in addition to Multimedia Resources. Default planned tasks and an Open workgroup a ...
... ESL-SOF is the application addressed to the Students that helps them to understand theoretical concepts by means of practical exercises and to prove their knowledge and progression by performing tests and calculations in addition to Multimedia Resources. Default planned tasks and an Open workgroup a ...
Variable Inductance Transducers
... • Since the two secondary windings are connected in series opposition, when the core is at the centre the output is zero (null position) • In the linear operating range o/p voltage is proportional to the core displacement • It provides magnitude as well as the direction. Direction can be obtained by ...
... • Since the two secondary windings are connected in series opposition, when the core is at the centre the output is zero (null position) • In the linear operating range o/p voltage is proportional to the core displacement • It provides magnitude as well as the direction. Direction can be obtained by ...
(MS)-07 - RC Circuit with Time Constant
... Then, what would be the time constant of the circuit. Remember the "5 tau rule." From the time constant, can you guess the resistance of the variable resistor in the current wiper position. What's your guess?: Now take the variable resistor (without touching the wiper handle) from the circuit, using ...
... Then, what would be the time constant of the circuit. Remember the "5 tau rule." From the time constant, can you guess the resistance of the variable resistor in the current wiper position. What's your guess?: Now take the variable resistor (without touching the wiper handle) from the circuit, using ...
Spark-gap transmitter
A spark-gap transmitter is a device that generates radio frequency electromagnetic waves using a spark gap.Spark gap transmitters were the first devices to demonstrate practical radio transmission, and were the standard technology for the first three decades of radio (1887–1916). Later, more efficient transmitters were developed based on rotary machines like the high-speed Alexanderson alternators and the static Poulsen Arc generators.Most operators, however, still preferred spark transmitters because of their uncomplicated design and because the carrier stopped when the telegraph key was released, which let the operator ""listen through"" for a reply. With other types of transmitter, the carrier could not be controlled so easily, and they required elaborate measures to modulate the carrier and to prevent transmitter leakage from de-sensitizing the receiver. After WWI, greatly improved transmitters based on vacuum tubes became available, which overcame these problems, and by the late 1920s the only spark transmitters still in regular operation were ""legacy"" installations on naval vessels. Even when vacuum tube based transmitters had been installed, many vessels retained their crude but reliable spark transmitters as an emergency backup. However, by 1940, the technology was no longer used for communication. Use of the spark-gap transmitter led to many radio operators being nicknamed ""Sparks"" long after they ceased using spark transmitters. Even today, the German verb funken, literally, ""to spark,"" also means ""to send a radio message or signal.""