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Simple Circuit Measures Battery Drain - Application Note
Simple Circuit Measures Battery Drain - Application Note

Document
Document

Slide 1
Slide 1

An Ultra-low Power Temperature Independent Subthreshold CMOS
An Ultra-low Power Temperature Independent Subthreshold CMOS

... generators since they play an important role in Analog to Digital and Digital to Analog Converters where a stable DC voltage independent of supply voltage and temperature is needed. They are also widely used in comparators, flash memories, PLLs, capacitance-to-digital convertors and Power management ...
MAX8559 Dual, 300mA, Low-Noise Linear Regulator General Description
MAX8559 Dual, 300mA, Low-Noise Linear Regulator General Description

... 2.2µF capacitor to bypass each output. Larger inputcapacitor values and lower ESRs provide better supplynoise rejection and line-transient response. To reduce output noise and improve load-transient voltage dips, use larger output capacitors up to 10µF. For stable operation over the full temperature ...
unit2 class
unit2 class

pub3241csoftstartersforelectricmotors
pub3241csoftstartersforelectricmotors

... a motor can damage the electrical parts of the motor. The inrush of current can create more motor wear and thus require additional maintenance. Motor life also will decrease. Motor soft starter devices were developed to reduce mechanical wear and increase motor life. ...
TRANSFORMER TYPES Potential Transformers
TRANSFORMER TYPES Potential Transformers

... various voltage, frequency and physical size ranges. We have broken them up into several different groupings: low voltage, which are system voltages under 15kV; high frequency, operating frequency over 1kHz; and size ranges from board mount parts up to current transformers with window sizes of 254mm ...
Chapter 6: Electricity
Chapter 6: Electricity

Navigation Light System, LED, NVG Compliant
Navigation Light System, LED, NVG Compliant

... and is sealed to IP67. The screen brightness automatically adjusts to ambient conditions. The software provides independent control of every light, with mimics and tables to show the status. Groups of lights can also be established to operate different navigation modes. Alarms are provided for commu ...
ET 16
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KILSEN - FE630-3 Conventional Optical Smoke Detector PRODUCT
KILSEN - FE630-3 Conventional Optical Smoke Detector PRODUCT

VAM90100P User Manual
VAM90100P User Manual

... protection,over time protection and low-voltage protection.The voltammeter adopts two upper and lower groups of LED nixie tubes and display measured data. During use, it can perform flexible switching for displaying different physical quantities. Therefore, the voltammeter is very suitable for monit ...
Data Sheets
Data Sheets

Maurizio Delfanti - CIRED • International Conference on Electricity
Maurizio Delfanti - CIRED • International Conference on Electricity

Module 4 – Math Practice C2 & 3
Module 4 – Math Practice C2 & 3

... in a circuit? (T5D03) • A. Resistance (R) equals voltage (E) multiplied by current (I) • B. Resistance (R) equals voltage (E) divided by current (I) • C. Resistance (R) equals voltage (E) added to current (I) • D. Resistance (R) equals voltage (E) minus current (I) ...
Electric Circuit`s
Electric Circuit`s

LI-4302PA
LI-4302PA

... The LI-4302 Line Isolation Unit is primarily a two wire dial through unit designed for use in conjunction with Customer Premises Equipment which is not capable of meeting the ACA requirements for line isolation and electrical safety. The LI -4302 provides the appropriate isolation standards and allo ...
static bypass switch
static bypass switch

... The new static switch of the series is a compact electronic switch. The digital PLL guarantees minimized synchronization time of inverter and mains frequency. Due to the high synchronization speed the unit can also be used together with diesel gensets as bypass mains supply. The transfer time betwee ...
Three-terminal adjustable negative voltage
Three-terminal adjustable negative voltage

... Thermal regulation is the effect of these temperature gradients on output voltage (in percentage output change) per watt of power change in a specified time. Thermal regulation error is independent of electrical regulation or temperature coefficient, and occurs within 5 ms to 50 ms after a change in ...
FAN7554 Versatile PWM Controller Features Description
FAN7554 Versatile PWM Controller Features Description

DN1001 - High Efficiency, High Density Power
DN1001 - High Efficiency, High Density Power

... The LTC®3731 3-phase controller helps meet all of these demands. It is a PolyPhase®, current mode controller that drives three synchronous buck converters 120° out of phase at frequencies up to 600kHz per phase. The clock output and synchronization circuits make it possible to design 6- or 12-phase ...
PI4MSD5V9545A/B/C Product Databrief NEW PRODUCT
PI4MSD5V9545A/B/C Product Databrief NEW PRODUCT

lab6 - People @ EECS at UC Berkeley
lab6 - People @ EECS at UC Berkeley

... 3. Measure the peak-to-peak voltage Vpp (including any overshoot), on both the high-to-low and low-tohigh transitions on channel 2. Given that the output range of the 74F04 is approximately 0-3V, comment on the Vpp measured at the end of the transmission line. Record your measurements on the checkof ...
Chapter 8 slideshow.notebook
Chapter 8 slideshow.notebook

... 1 coulomb = 6.25 x 1018  electrons. (added or subtracted) ...
< 1 ... 1619 1620 1621 1622 1623 1624 1625 1626 1627 ... 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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