What Does an AC Voltmeter Measure? - Physics
... First consider “ordinary” circuits operating at angular frequency ω for which: 1. The size of the circuit (and of the voltmeter leads) is small compared to the wavelength λ = 2πc/ω, where c is the speed of light. In this case there is no spatial variation to the current in any segment of a loop betw ...
... First consider “ordinary” circuits operating at angular frequency ω for which: 1. The size of the circuit (and of the voltmeter leads) is small compared to the wavelength λ = 2πc/ω, where c is the speed of light. In this case there is no spatial variation to the current in any segment of a loop betw ...
RF Communications
... MC13135P,DW, MC13136DW TA = –40° to +85°C, Case 724, 751E The MC13135 is a full dual conversion receiver with oscillators, mixers, Limiting IF Amplifier, Quadrature Discriminator, and RSSI circuitry. It is designed for use in security systems, cordless phones, and VHF mobile and portable radios. Its ...
... MC13135P,DW, MC13136DW TA = –40° to +85°C, Case 724, 751E The MC13135 is a full dual conversion receiver with oscillators, mixers, Limiting IF Amplifier, Quadrature Discriminator, and RSSI circuitry. It is designed for use in security systems, cordless phones, and VHF mobile and portable radios. Its ...
Physics
... 1) A white snooker ball moving at 5m/s strikes a red ball and pots it. Both balls have a mass of 1kg. If the white ball continued in the same direction at 2m/s what was the velocity of the red ball? 2) A car of mass 1000kg heading up the M1 at 50m/s collides with a stationary truck of mass 8000kg an ...
... 1) A white snooker ball moving at 5m/s strikes a red ball and pots it. Both balls have a mass of 1kg. If the white ball continued in the same direction at 2m/s what was the velocity of the red ball? 2) A car of mass 1000kg heading up the M1 at 50m/s collides with a stationary truck of mass 8000kg an ...
ADP2114 Configurable, Dual 2 A/Single 4 A, Synchronous Step-Down DC-to-DC Regulator
... The two PWM channels are 180º phase shifted to reduce input ripple current and to reduce input capacitance. The ADP2114 provides high efficiency and operates at switching frequencies of up to 2 MHz. At light loads, the ADP2114 can be set to operate in pulse skip mode for higher efficiency or in forc ...
... The two PWM channels are 180º phase shifted to reduce input ripple current and to reduce input capacitance. The ADP2114 provides high efficiency and operates at switching frequencies of up to 2 MHz. At light loads, the ADP2114 can be set to operate in pulse skip mode for higher efficiency or in forc ...
Introduction to Short Circuit Analysis
... To select the appropriate fuse and breaker/relay settings, it's necessary to perform a short circuit and coordination analysis for the electrical system. The process begins with developing a single line diagram for the electrical distribution system. Equipment and conductor impedances, operating vol ...
... To select the appropriate fuse and breaker/relay settings, it's necessary to perform a short circuit and coordination analysis for the electrical system. The process begins with developing a single line diagram for the electrical distribution system. Equipment and conductor impedances, operating vol ...
Document
... 1) A white snooker ball moving at 5m/s strikes a red ball and pots it. Both balls have a mass of 1kg. If the white ball continued in the same direction at 2m/s what was the velocity of the red ball? 2) A car of mass 1000kg heading up the M1 at 50m/s collides with a stationary truck of mass 8000kg an ...
... 1) A white snooker ball moving at 5m/s strikes a red ball and pots it. Both balls have a mass of 1kg. If the white ball continued in the same direction at 2m/s what was the velocity of the red ball? 2) A car of mass 1000kg heading up the M1 at 50m/s collides with a stationary truck of mass 8000kg an ...
P83160
... rings are required, conduit should enter through backbox, not extension ring. Use Steel City #53151/1-1/2" deep or #53171/2-1/8" deep extension rings or equal with same area cut out in back. 5. Use care and proper techniques to position the field wires in the backbox so that they use minimum space a ...
... rings are required, conduit should enter through backbox, not extension ring. Use Steel City #53151/1-1/2" deep or #53171/2-1/8" deep extension rings or equal with same area cut out in back. 5. Use care and proper techniques to position the field wires in the backbox so that they use minimum space a ...
BDTIC
... defined as 8 x 20 µs. For telecommunications applications, the open-circuit voltage is defined as 10 x 700 µs and the short-circuit current is a 5 x 300 µs waveform. The source impedance is given as 40 Ω. The type of suppression element needed for IEC 61000-4-5 class surges depends upon the threat l ...
... defined as 8 x 20 µs. For telecommunications applications, the open-circuit voltage is defined as 10 x 700 µs and the short-circuit current is a 5 x 300 µs waveform. The source impedance is given as 40 Ω. The type of suppression element needed for IEC 61000-4-5 class surges depends upon the threat l ...
8-Bit, 250 MSPS 3.3 V A/D Converter AD9480
... The real and complex impedances measured at each analog input port. The resistance is measured statically, and the capacitance and differential input impedances are measured with a network analyzer. Differential Analog Input Voltage Range The peak-to-peak differential voltage that must be applied to ...
... The real and complex impedances measured at each analog input port. The resistance is measured statically, and the capacitance and differential input impedances are measured with a network analyzer. Differential Analog Input Voltage Range The peak-to-peak differential voltage that must be applied to ...
Noise - nptel
... As noted earlier, when send some information-bearing signal through a physical channel, the signal undergoes changes in several ways. Some of the ways are the following: • The signal is usually reduced or attenuated in strength (measured in terms of received power or energy per symbol) • The signal ...
... As noted earlier, when send some information-bearing signal through a physical channel, the signal undergoes changes in several ways. Some of the ways are the following: • The signal is usually reduced or attenuated in strength (measured in terms of received power or energy per symbol) • The signal ...
DAC813 数据资料 dataSheet 下载
... All latches are level-triggered. Data present when the control signals are logic “0” will enter the latch. When any one of the control signals returns to logic “1”, the data is latched. A truth table for the control signals is presented in Table II. ...
... All latches are level-triggered. Data present when the control signals are logic “0” will enter the latch. When any one of the control signals returns to logic “1”, the data is latched. A truth table for the control signals is presented in Table II. ...
Resistive opto-isolator
Resistive opto-isolator (RO), also called photoresistive opto-isolator, vactrol (after a genericized trademark introduced by Vactec, Inc. in the 1960s), analog opto-isolator or lamp-coupled photocell, is an optoelectronic device consisting of a source and detector of light, which are optically coupled and electrically isolated from each other. The light source is usually a light-emitting diode (LED), a miniature incandescent lamp, or sometimes a neon lamp, whereas the detector is a semiconductor-based photoresistor made of cadmium selenide (CdSe) or cadmium sulfide (CdS). The source and detector are coupled through a transparent glue or through the air.Electrically, RO is a resistance controlled by the current flowing through the light source. In the dark state, the resistance typically exceeds a few MOhm; when illuminated, it decreases as the inverse of the light intensity. In contrast to the photodiode and phototransistor, the photoresistor can operate in both the AC and DC circuits and have a voltage of several hundred volts across it. The harmonic distortions of the output current by the RO are typically within 0.1% at voltages below 0.5 V.RO is the first and the slowest opto-isolator: its switching time exceeds 1 ms, and for the lamp-based models can reach hundreds of milliseconds. Parasitic capacitance limits the frequency range of the photoresistor by ultrasonic frequencies. Cadmium-based photoresistors exhibit a ""memory effect"": their resistance depends on the illumination history; it also drifts during the illumination and stabilizes within hours, or even weeks for high-sensitivity models. Heating induces irreversible degradation of ROs, whereas cooling to below −25 °C dramatically increases the response time. Therefore, ROs were mostly replaced in the 1970s by the faster and more stable photodiodes and photoresistors. ROs are still used in some sound equipment, guitar amplifiers and analog synthesizers owing to their good electrical isolation, low signal distortion and ease of circuit design.