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AD8348 数据手册DataSheet 下载
AD8348 数据手册DataSheet 下载

... Separate I- and Q-channel baseband amplifiers follow the baseband outputs of the mixers. The voltage applied to the VCMO pin sets the dc common-mode voltage level at the baseband outputs. Typically, VCMO is connected to the internal VREF voltage, but it can also be connected to an external voltage. ...
DTC P0102 Mass Air Flow (MAF) Sensor Circuit Low
DTC P0102 Mass Air Flow (MAF) Sensor Circuit Low

DS2786 Stand-Alone OCV-Based Fuel Gauge
DS2786 Stand-Alone OCV-Based Fuel Gauge

LT5511 - High Signal Level Upconverting Mixer.
LT5511 - High Signal Level Upconverting Mixer.

... Oscillator Signal. They can also be driven single-ended by connecting one to an RF ground through a DC blocking capacitor. For single-ended drive, use LO+ for the signal input, as this results in less interference from unwanted coupling of the LO signal to other pins. These pins are internally biase ...
5-segment square-root approximation - RV
5-segment square-root approximation - RV

Old Company Name in Catalogs and Other Documents
Old Company Name in Catalogs and Other Documents

... • The information in this document is current as of March, 2002. The information is subject to change without notice. For actual design-in, refer to the latest publications of NEC's data sheets or data books, etc., for the most up-to-date specifications of NEC semiconductor products. Not all product ...
17227 1 - SK Engineering Academy
17227 1 - SK Engineering Academy

... operate, there should be sufficiently quick backup protection so that the rest of the system is protected. By coordinating relays, faults can always be isolated quickly without serious disturbance to the rest of the system. 9. Give the limitations of Merz Price protection. Since neutral earthing res ...
Chapter 002 Resistors
Chapter 002 Resistors

... 18. (p. 60) Two major characteristics of a resistor are A. resistance in ohms and tolerance in percentage B. resistance in ohms and power rating in watts C. resistance in ohms and conductivity in mhos D. resistance in ohms and power in joules ...
EXECUTIVE SUMMARY THE MAXIMUM INVERTER OUTPUT
EXECUTIVE SUMMARY THE MAXIMUM INVERTER OUTPUT

... Overcurrent Device Ratings. Overcurrent device ratings shall be not less than 125 percent of the maximum currents calculated in 690.8(A). Exception: Circuits containing an assembly, together with its overcurrent device(s), that is listed for continuous operation at 100 percent of its rating shall be ...
26 28 16 Enclosed Switches and Circuit Breakers
26 28 16 Enclosed Switches and Circuit Breakers

High Frequency Harmonics Emission in Smart Grids
High Frequency Harmonics Emission in Smart Grids

september - Linear Technology
september - Linear Technology

... LTC3035 300mA VLDO™ Linear Regulator as the number one analog product in the publication’s Ultimate Products category. The device features input voltage capability down to 1.7V. To allow operation at low input voltages, the LTC3035 includes an integrated charge pump converter ...
Monolithic Active Pixel Detectors
Monolithic Active Pixel Detectors

Thevenin`s And Norton`s Theorem
Thevenin`s And Norton`s Theorem

PPT - Electrical and Computer Engineering
PPT - Electrical and Computer Engineering

Chapter Title
Chapter Title

... power (in W). True power equals the product of Voltamperes and power factor. Power factor can be determined using: ...
CT281 Manual
CT281 Manual

... The Heaterstat has been designed to replace mechanical thermostats in some applications. Reliability, low-cost, solidstate operation, and efficient heating are its primary benefits. If your system requires precision control, then you must consider several other factors besides the simple calibration ...
Pulse Transmission and Cable Properties
Pulse Transmission and Cable Properties

... In the laboratory you almost always transmit voltages and currents from one place to another using a cable. For our purposes, a cable is a pair of parallel conductors, each of constant cross-section, although not necessarily identical. The conductors need not be side by side but one can be inside th ...
Improving common-mode rejection using the right
Improving common-mode rejection using the right

... RLD loop depends on the number of channels that are used to detect the common-mode voltage. In this experiment, only one channel is used to sense the common potential of the input. For the given feedback resistor, as the number of channels used to measure the common-mode potential increases, the gai ...
Capturing Generator Rotor Angle and Field Quantities
Capturing Generator Rotor Angle and Field Quantities

... The current signal has a similar characteristic, though it is measured through slightly different means. Where the voltage signal can, with proper isolation, be safely connected to the measurement device, the current flowing through the field winding can be several hundreds to thousands of amperes, ...
Packet #4 - NNHS Tigerscience
Packet #4 - NNHS Tigerscience

MS5561-C
MS5561-C

... 1) A stable pressure reading of the given resolution requires taking the average of 2 to 4 subsequent pressure values due to noise of the ADC. 2) Maximum error of pressure reading over the pressure range. 3) Maximum error of pressure reading over the pressure range after offset adjustment at one pre ...
PPT - Electrical and Computer Engineering
PPT - Electrical and Computer Engineering

DS2786B Stand-Alone OCV-Based Fuel Gauge General Description Features
DS2786B Stand-Alone OCV-Based Fuel Gauge General Description Features

... Stand-Alone OCV-Based Fuel Gauge Parameter Measurement The DS2786B uses a sigma-delta A/D converter to make measurements. The measurement sequence shown in Figure 4 repeats continuously while the DS2786B is in Active Mode. The VOUT pin is activated tPRE before the AIN0 and AIN1 conversion to allow f ...
Features •
Features •

... The Atmel AT27C2048 is a low-power, high-performance 2,097,152-bit, one-time programmable, read-only memory (OTP EPROM) organized as 128K by 16 bits. It requires a single 5V power supply in normal read mode operation. Any word can be accessed in less than 55 ns, eliminating the need for speed-reduci ...
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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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