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EE595_Team2_P3_Fall07
EE595_Team2_P3_Fall07

Word
Word

... The recloser mechanism shall consist of a bi-stable magnetic actuator capable of fast opening and closing operations with no recharging delay. Bi-stable means that no operating power is required to hold the unit open or closed. ...
2.7 V to 5.5 V, 250 µA, Rail-to-Rail Output nano AD5662
2.7 V to 5.5 V, 250 µA, Rail-to-Rail Output nano AD5662

PDF
PDF

... The recloser mechanism shall consist of a bi-stable magnetic actuator capable of fast opening and closing operations with no recharging delay. Bi-stable means that no operating power is required to hold the unit open or closed. ...
PI6C5946004
PI6C5946004

... It is suggested to add another cross 100ohm at TX side to tune the LVPECL output V_swing without changing the optimal 150ohm pull-down bias in Fig. 12. This form of double termination can reduce the V_swing in ½ of the original at the RX side. By fine tuning the 100ohm resistor at the TX side with l ...
Noise Measurement Setup for Quartz Crystal
Noise Measurement Setup for Quartz Crystal

... whose light controls the size of photo resistor. This optoisolator determines the amplification of the first amplifier and inertially stabilizes the amplitude of oscillator itself to obtain corresponding voltage, which excites LED, on the output of the second amplifier. The signals from both oscilla ...
introduction-to-the-arduino
introduction-to-the-arduino

SMDC-16 - American Safe Inc.
SMDC-16 - American Safe Inc.

... 17-18-19-20 Keypad Data and Power • A total of eight (8) keypads can be connected to the system • The voltage available across terminals 19 and 20 is approximately 13.5VDC • A self resetting PTC protects this power output. • The data pair (terminals 17 and 18) must be minimum #22 AWG twisted pair. • ...
32-Position Manual Up/Down Control Potentiometer AD5228
32-Position Manual Up/Down Control Potentiometer AD5228

... The AD5228 can also be controlled digitally; its up/down features simplify microcontroller usage. The AD5228 is available in a compact thin SOT-23-8 (TSOT-8) package. The part is guaranteed to operate over the automotive temperature range of −40°C to +105°C. The AD5228’s simple interface, small foot ...
PoE Auxiliary Supply Applications
PoE Auxiliary Supply Applications

... sourcing device on the cable. The auxiliary supply support can be implemented in three ways. Dependant where the auxiliary supply is injected the configurations are called front, rear and direct auxiliary supply. ...
Self-generated and Externally Driven Current Oscillations in n-GaAs
Self-generated and Externally Driven Current Oscillations in n-GaAs

EUP9261  LI-ION/POLYMER ONE CELL PROTECTOR
EUP9261 LI-ION/POLYMER ONE CELL PROTECTOR

... *1 If the threshold voltage of an EFT is low, the FET may not cut the charging current. ...
AD5293 - Analog Devices
AD5293 - Analog Devices

TPA2012D2 数据资料 dataSheet 下载
TPA2012D2 数据资料 dataSheet 下载

... The TPA2012D2 is a stereo, filter-free, Class-D audio amplifier (class-D amp) available in a WCSP, QFN, or PWP package. The TPA2012D2 only requires two external components for operation. The TPA2012D2 features independent shutdown controls for each channel. The gain can be selected to 6, 12, 18, or ...
AN-1557 LM5022 Evaluation Board (Rev. C)
AN-1557 LM5022 Evaluation Board (Rev. C)

7. Operations with external signal
7. Operations with external signal

... Jog run is used for inching the motor. When a jog run signal is input, a jog run frequency is immediately output, regardless of the acceleration time set. Assign the jog run function to any input terminal. For example, when assigned to the S2 terminal, set  = . Jog run is done while the jog in ...
Transistor Circuits
Transistor Circuits

... limiting resistor R3. The LED's are arranged so that when the polarity across the circuit is one way only one LED will light and when the polarity reverses the other LED will light, therefore when no transistor is connected to the tester the LED's will alternately flash. The IC2 outputs are also con ...
EMI Issues in Semiconductor Manufacturing Environment
EMI Issues in Semiconductor Manufacturing Environment

... normal operation of equipment. Though FCC, CE or similar regulations tightly control parasitic emission, in actual installations it is often higher than a manufacturer foresaw. This is mainly due to extra long cabling that may also have partially-engaged connectors and often-open covers that are sup ...
Programming Pulse Generators for Flash Memories
Programming Pulse Generators for Flash Memories

... effective and reliable alternative for updatable nonvolatile memory. Utilizing the electrical program-erase capability requires linear circuitry techniques. The Intel 28F256 flash memory, built on the ETOX process, specifies programming operation with 12V or 12.75V (faster erase/program times) amplitu ...
MAX1181 Dual 10-Bit, 80Msps, 3V, Low-Power ADC General Description
MAX1181 Dual 10-Bit, 80Msps, 3V, Low-Power ADC General Description

... the full-scale range of the ADC. A flexible reference structure allows the use of the internal or external reference, if desired for applications requiring increased accuracy or a different input voltage range. The MAX1181 features parallel, CMOS-compatible three-state outputs. The digital output fo ...
Guidelines for the Design, Installation, Operation
Guidelines for the Design, Installation, Operation

MAX1425 10-Bit, 20Msps ADC General Description Features
MAX1425 10-Bit, 20Msps ADC General Description Features

... The MAX1425 employs a differential pipelined architecture with a wideband T/H amplifier to maximize throughput while limiting power consumption to only 172mW. The MAX1425 generates an internal +2.5V reference that supplies three additional reference voltages (+3.25V, +2.25V, and +1.25V). These refer ...
Enhancement Loads
Enhancement Loads

MAX9987/MAX9988 +14dBm to +20dBm LO Buffers/Splitters with ±1dB Variation General Description
MAX9987/MAX9988 +14dBm to +20dBm LO Buffers/Splitters with ±1dB Variation General Description

... The MAX9987/MAX9988 LO amplifiers/splitters each consist of a single input amplifier, a two-way passive power splitter, two separate output amplifiers, as well as a third buffer amplifier to drive the LO’s PLL. The bias currents for the amplifiers are adjustable through off-chip resistors. This allo ...
ADS5272 数据资料 dataSheet 下载
ADS5272 数据资料 dataSheet 下载

... Analog Input Common-Mode Range Differential Full-Scale Input Voltage Range ...
< 1 ... 375 376 377 378 379 380 381 382 383 ... 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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