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Control Gear Selection
Control Gear Selection

... This circuit has all the advantages of high frequency, but with the added benefit of being able to dim and brighten (regulate) the lamps. The light regulation is by a separate pair of conductors which can regulate the lamp lumen output by either supplying a 1-10 volt signal or by a potentiometer. Th ...
Experiment 16: DC and AC Operating Point Analysis of an RF
Experiment 16: DC and AC Operating Point Analysis of an RF

... The purpose of this simulation is to demonstrate the characteristics and operation of an RF amplifier using DC and AC analysis in the course of our study. Radio frequency amplifiers perform the function that their name implies. They select and amplify a narrow band of radio frequency signals. Their ...
UMZ-104-A16-G
UMZ-104-A16-G

... Exceeding any one or a combination of the Absolute Maximum Rating conditions may cause permanent damage to the device. Extended application of Absolute Maximum Rating conditions to the device may reduce device reliability. Specified typical performance or functional operation of the device under Abs ...
Flexible, efficient voltage translation for open-drain and push-pull apps NXP bidirectional voltage
Flexible, efficient voltage translation for open-drain and push-pull apps NXP bidirectional voltage

... When EN is HIGH, the translator switch is on and the An I/O is connected to the Bn I/O. This allows bidirectional data flow between ports. When EN is LOW, the translator switch is off and a high-impedance state exists between ports. The EN input circuit is designed to be supplied by Vref(B). To ens ...
1.  Divergence of the three dimensional radial vector field ...  A.  3 B.
1. Divergence of the three dimensional radial vector field ... A. 3 B.

... 49. In an n-channel enhancement MOSFET, at a fixed drain voltage A. the drain current has a finite value at zero gate voltage and it increases with applied negative gate voltage. B. the drain current is zero at zero gate voltage and it increases with the applied positive gate voltage. C. the drain c ...
Algebra 2 Modeling - Circuits
Algebra 2 Modeling - Circuits

... One equation that describes what is occurring in the walls is: V = I∙R, where V is the voltage in volts, I is the current in amps, and R is the resistance in ohms (This is very similar to friction between two objects.) 1. The diagram for a circuit looks like this: Where the R’s are the resistors and ...
PROBLEM SET Current, Voltage, and Resistance
PROBLEM SET Current, Voltage, and Resistance

... 1. (I)Five amperes of current is flowing through a point on a wire. a. How many coulombs of charge flow by the point in 1 second? b. How many coulombs of charge flow by the point in 5 seconds? 2. (I) If electric current flows in only one direction it is called _____ current. Current that changes dir ...
Paper E1 - Digital Circuits
Paper E1 - Digital Circuits

16electricity review - Mr-Hubeny
16electricity review - Mr-Hubeny

ppt - MakeItOrTakeIt
ppt - MakeItOrTakeIt

... the light doesn’t fall on diac so the diac is off means the current does not flow through the diac. • When logic 1 is given as input to the LED then light emitted by LED falls on diac so it starts conducting i.e., now there will be current flowing through the diac. ...
In this method cross correlation is used to find the impedance of the
In this method cross correlation is used to find the impedance of the

EUP2410  1.6A, 500KHz Synchronous Step-up  Converter
EUP2410 1.6A, 500KHz Synchronous Step-up Converter

... conduction path from SW to OUT is fully blocked and the OUT pin is isolated from the battery. This output disconnect feature reduces the shutdown current to typically only 50nA. The 500KHz switching frequency allows for smaller external components producing a compact solution for a wide range of loa ...
P3 Silicon solar cell
P3 Silicon solar cell

... with a variable resistor (R) between its terminals. Also, a lamp is installed that will illuminate the photocell. A voltmeter is connected in parallel with the resistor and photocell enabling you to measure the voltage (V) between the photocell terminals under illumination. The circuit diagram for t ...
Determination of Planck`s constant using LEDs
Determination of Planck`s constant using LEDs

... contains excess electrons. When p- and n-type semiconductors are brought together to form a p-n junction, electrons with energies in the conduction band diffuse from the n-side to the p-side and holes with energies in the valence band diffuse from the p-side to the n-side. Without an externally appl ...
Review Test #6: Electric Circuits
Review Test #6: Electric Circuits

... 3. A circuit in your home has a 15 A circuit breaker. How many 60 W incandescent bulbs can be operated at the same time using 120 V? ...
Low Frequency Receiver Circuit
Low Frequency Receiver Circuit

Ohms Law and Basic Circuit Theory
Ohms Law and Basic Circuit Theory

1. What`s another name for a coulomb per second (C/S)? a. Amp 2
1. What`s another name for a coulomb per second (C/S)? a. Amp 2

... 2. What’s the symbol we use for Current? a. I 3. What kind of circuit has two resistors in a row (charges HAVE to flow through both)? a. Series 4. What is the full name for an amp? a. Ampere 5. What’s the overall resistance for a 10 Ω and a 40 Ω resistor in series? a. 50 Ω (add them) 6. What is the ...
H-Bridge
H-Bridge

Power Sensor Theory - Herbert Dingfelder – DL5NEG
Power Sensor Theory - Herbert Dingfelder – DL5NEG

... Industries [1]. Their zero-bias Schottky detector diode SMS 7630 can be used to build really good diode sensors. The easy-to-get BAT62 from Infineon also gives a very flat frequency response, but the video resistance (the differential source resistance of the DC output voltage) is higher. If a high- ...
Ohm`s Law
Ohm`s Law

... Georg Ohm discovered that the ratio of the potential difference to the current is a constant value for a given conductor. The relationship R=V I is followed by most conductive materials. Those materials that follow this relationship are said to obey Ohm’s Law. However, in some materials, the relatio ...
ENT161LAB5 - Portal UniMAP
ENT161LAB5 - Portal UniMAP

... 1.2 To construct a graph, using measured values of voltage, current and load resistance and calculated power to verify graphically Objective 1 above. ...
Signal Attenuation - Department of Information Technologies
Signal Attenuation - Department of Information Technologies

AD8394 数据手册DataSheet 下载
AD8394 数据手册DataSheet 下载

... 21 NC ...
LM386 Audio Amplifier - Cornerstone Robotics
LM386 Audio Amplifier - Cornerstone Robotics

... Explanation: This amplifier shows the LM386 in a high-gain configuration (Gain = 200). For a maximum gain of only 20, leave out the 10 F capacitor C4 connected from pin 1 to pin 8. Maximum gains between 20 and 200 may be realized by adding a selected resistor in series with the C4. The 10k potentio ...
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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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