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Using multimeter
Using multimeter

... The menu is organized in a top-down tree structure with three levels, as schematically shown in the following. ...
MAX8211/MAX8212 Microprocessor Voltage Monitors with
MAX8211/MAX8212 Microprocessor Voltage Monitors with

... that the CMOS parts have an absolute maximum supply-voltage rating of 18V, and should never be used in applications where this rating could be exceeded. Exercise caution when replacing ICL8211/ICL8212s in closed-loop applications such as programmable zeners. Although neither the ICL8211/ICL8212 nor ...
MAX4100/MAX4101 500MHz, Low-Power Op
MAX4100/MAX4101 500MHz, Low-Power Op

... that can be configured as an inverting or noninverting gain block, as shown in Figures 1a and 1b. The gain is determined by the ratio of two resistors and does not affect amplifier frequency compensation. In the unity-gain configuration (as shown in Figure 1c), maximum bandwidth and stability is ach ...
Experiment - TerpConnect
Experiment - TerpConnect

... tightly bound and cannot move freely are electrical insulators. Later this proportionality factor will be generalized in the concept of impedance. Batteries produce an electrical potential difference through chemical reactions. If a connection is made between these two regions of the battery with s ...
Alternating Current (AC) vs. Direct Current (DC)
Alternating Current (AC) vs. Direct Current (DC)

... Home and office outlets are almost always AC. This is because generating and transporting AC across long distances is relatively easy. At high voltages (over 110kV), less energy is lost in electrical power transmission. Higher voltages mean lower currents, and lower currents mean less heat generated ...
Wireless Communications and Networks
Wireless Communications and Networks

... The FM and AM receivers are basically the same, however the FM receiver uses a limiter and a discriminator to remove AM variations and to convert frequency changes to amplitude variations respectively. As a result they (FM) have higher gain than AM. FM receivers give high fidelity reproduction due t ...
(a) (b)
(a) (b)

... What is the value of R (3rd resistor in circuit)? a. 50 Ω b. 25Ω c. 10 Ω d. 0 ...
Bip Transistor 160V 700mA VCE(sat);500mV max. PNP Single PCP
Bip Transistor 160V 700mA VCE(sat);500mV max. PNP Single PCP

... Any and all SANYO Semiconductor Co.,Ltd. products described or contained herein are, with regard to "standard application", intended for the use as general electronics equipment. The products mentioned herein shall not be intended for use for any "special application" (medical equipment whose purpos ...
Document
Document

... EXAMPLE 2: A resistor was held at constant temperature in an operating electric circuit. A student measured the current through the resistor and the potential difference across it. The measurements are shown in the data table below. ...
Lab 16 - ece.unm.edu
Lab 16 - ece.unm.edu

Unit 7: MOSFET-Output Motor Controller
Unit 7: MOSFET-Output Motor Controller

Thesis-1949-W721e
Thesis-1949-W721e

NSS-MIC 2005 Conference Record Template - OSU Physics
NSS-MIC 2005 Conference Record Template - OSU Physics

Ch 6
Ch 6

... to act as a “constant-current source” for the differential pair formed by Q1 and Q2. • By definition, a constant-current source will conduct the same amount of current irrespective of the voltage across it. • Since dynamic resistance (RD) is RD = V / I, the RD of a constant-current source is infin ...
Some basic electronics for radio
Some basic electronics for radio

... A capacitor is a device that stores charge. The simplest capacitor consists of two conductors separated by a dielectric (a material with very high resistance). If we attach the two plates of a capacitor to the two terminals of a battery, charge will ow to or from the plates until one plate has the ...
UA741CP
UA741CP

... > Vary the frequency from DC (0 Hz) to the highest limit of the function generator. What did you see? (Don’t forget to use DC coupling on the scope at low frequency.) > Increase the amplitude of the input to the maximum value of the function generator. What did you see? Rule 2: - The inputs draw no ...
MP1410 2A Step Down DC to DC Converter
MP1410 2A Step Down DC to DC Converter

... voltage as low as 1.22V, and is able to supply up to 2A of load current. The MP1410 uses current-mode control to regulate the output voltage. The output voltage is measured at FB through a resistive voltage divider and amplified through the internal error amplifier. The output current of the transco ...
DS2003/DS9667/DS2004 High Current/Voltage Darlington Drivers
DS2003/DS9667/DS2004 High Current/Voltage Darlington Drivers

Photo diode: An Ultimate Multipurpose Device
Photo diode: An Ultimate Multipurpose Device

... The photocurrent is the sum of both the dark current (without light) and the light current, so the dark current must be minimized to enhance the sensitivity of the device. ...
Introduction to the Multimeter
Introduction to the Multimeter

...  We can replace the two series resistors with 1 single resistor, we call Req  The value of Req is the SUM of R1 & R2: Req=R1+R2=.5K Ω + .5K Ω = 1KΩ ...
3B32 数据手册DataSheet 下载
3B32 数据手册DataSheet 下载

... plugs into a socket on the backplane and accepts its signal from the input screw terminals. All input modules provide input protection, amplification and filtering of the input signal, accuracy of +0.1%, low drift of +1 uV/oC (low-level input modules), and feature two high-level analog outputs that ...
Revision - schoolphysics
Revision - schoolphysics

... 70 The primary of a transformer has 1200 turns and the secondary 400 turns. If the input voltage is 3000 V, what is the output voltage? 71 Will a transformer work using direct current, alternating current or both? 72 In the copper plating experiment, which electrode was copper plated. 73 If 2 g of c ...
Analog Path Amplification/Attenuation Resistive divider --
Analog Path Amplification/Attenuation Resistive divider --

10 W, 24 V / 5 V Off-Line Power Supply
10 W, 24 V / 5 V Off-Line Power Supply

... output power supply intended for industrial control applications. ON Semiconductor’s NCP1027 integrated monolithic controller is implemented in a discontinuous conduction mode (DCM) flyback topology to provide 24 volts for powering motors or relays and an additional 5 volt output is provided utilizi ...
Additional sc Electricity
Additional sc Electricity

... Explain the shape of each graph ...
< 1 ... 1775 1776 1777 1778 1779 1780 1781 1782 1783 ... 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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