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General - Cable Quest
General - Cable Quest

2STR1230
2STR1230

... High current gain characteristic ...
HST_CRF_04_02_03.qxd
HST_CRF_04_02_03.qxd

... a. one battery, three resistors, and one closed switch. b. one capacitor, three lamps, and one closed switch. c. one battery, three lamps, and one open switch. d. three resistors, one open switch, and one battery. ______ 3. The part of a circuit that converts electrical energy to other forms of ener ...
DC and Small Signal
DC and Small Signal

DC Voltmeters and Ammeters Ammeters Voltmeters Homework
DC Voltmeters and Ammeters Ammeters Voltmeters Homework

... A _____________ lets you ______________ which shunt resistor is _____________ Problems with Ammeters o The ________________ of the coil and shunt ________________ add to the ________________ of the circuit o This ________________ the ________________ in the circuit o ________________ ammeter has ___ ...
lesson2
lesson2

... Consider the circuit at right. When the switch is in the down position, the capacitor is charged by the battery. Once the capacitor is charged, the switch is moved so that the inductor and capacitor are connected. The capacitor begins to discharge, causing a current to flow through the circuit. The ...
SGA3586Z 数据资料DataSheet下载
SGA3586Z 数据资料DataSheet下载

... The information in this publication is believed to be accurate and reliable. However, no responsibility is assumed by RF Micro Devices, Inc. ("RFMD") for its use, nor for any infringement of patents, or other rights of third parties, resulting from its use. No license is granted by implication or ot ...
2STC4468
2STC4468

... Output characteristics ...
PN Junction Diodes and Applications
PN Junction Diodes and Applications

Guide Specification for Ashley-Edison SES Single Phase AC
Guide Specification for Ashley-Edison SES Single Phase AC

MODEL 2681 Voltage Band Monitor
MODEL 2681 Voltage Band Monitor

Series and Parallel Circuits Virtual Lab
Series and Parallel Circuits Virtual Lab

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TDA1574 Integrated FM tuner for radio receivers

... packages. Wave soldering is often preferred when through-hole and surface mounted components are mixed on one printed-circuit board. However, wave soldering is not always suitable for surface mounted ICs, or for printed-circuits with high population densities. In these situations reflow soldering is ...
1. The current in the secondary coil of a step
1. The current in the secondary coil of a step

... 360-Hz ac generator in the circuit has an rms voltage of 208 V. What is the average electric power dissipated by the circuit? * A. 166 W * B. 193 W * C. 102 W * D. 81 W * E. 22 W ...
Underclocking: Monarch Manual Clock and Voltage Setting
Underclocking: Monarch Manual Clock and Voltage Setting

... There are two commands that can be issued to change either Frequency or Voltage. Although it is possible to set the exact Voltage on the card, the same cannot be done regarding Frequency, as the chips main oscillator is a Ring oscillator. Hence for Frequency, indexes are used, and it is known that a ...
Reverse Biased Capacitance + + + + +
Reverse Biased Capacitance + + + + +

... of generation! The explanation based on the drift current (given earlier) is still valid: generated holes and electrons drift through the depletion layer. ...
Test 2 - Personal.psu.edu
Test 2 - Personal.psu.edu

... If you use your calculator to get results, be sure to show explicitly what your entered into the calculator, and the results it gave you. Make sure you answer the question and use appropriate units if needed!!! (5 pts) ...
Small Signal Analysis of BJT Amplifiers
Small Signal Analysis of BJT Amplifiers

... For the transistor in Figure 7, the parameters are β = 100 and VA = ∞. (a) Design the circuit such that IEQ = 1 mA and the Q-point is in the center of the dc load line. (b) If the peak-to-peak sinusoidal output voltage is 4 V, determine the peak-to-peak sinusoidal signals at the base of the transist ...
+ duracell - University of Iowa Physics
+ duracell - University of Iowa Physics

... Heat produced in a resistor • Power  P = I V or I2  R • Power is measured in Watts = amps  volts • All wire is rated for the maximum current that it can handle based on how hot it can get • To carry more current you need wire of a larger diameter  this is called the wire gauge, the lower the g ...
current - University of Iowa Physics
current - University of Iowa Physics

Battery-Resistor Circuit SIM Homework II Answer Key
Battery-Resistor Circuit SIM Homework II Answer Key

Layout 1 (Page 1)
Layout 1 (Page 1)

... and is easily cleaned. Twenty-five year limited warranty. Optional AmWhite-90 or equal 90% reflective white aluminum. Reflectors have a unique four-point pressure fit. ...
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Signal Conditioning Circuits :Power Supplies

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Understanding 4–20 mA circuits
Understanding 4–20 mA circuits

lecture12
lecture12

... The 5 kW resistor is not “in” the circuit after the switch. R = 10 kW, C = 1 mF ...
< 1 ... 1844 1845 1846 1847 1848 1849 1850 1851 1852 ... 2207 >

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.
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