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AD5821 数据手册DataSheet 下载
AD5821 数据手册DataSheet 下载

... It is intended for driving voice coil actuators in applications such as lens autofocus, image stabilization, and optical zoom. The circuit diagram is shown in Figure 20. A 10-bit current output DAC coupled with Resistor R generates the voltage that drives the noninverting input of the operational am ...
353/355 Users Manual
353/355 Users Manual

... Low Pass Filter button- Press to turn on the low pass filter. The filter eliminates high frequency noise such as from a ASD or VFD motor speed controller. Volts/Ohm input terminal. (355 only) Common input terminal. (355 only) Min Max button -When first pressed, the Meter shows maximum input. With su ...
BoxLED XS Plus G15
BoxLED XS Plus G15

A CURRENT-MODE LOGIC FREQUENCY DIVIDER
A CURRENT-MODE LOGIC FREQUENCY DIVIDER

... A phase-locked loop (PLL) is an important mixed-signal circuit that is used on almost every integrated circuit. A frequency divider is needed in the PLL loop to allow the use of a low frequency reference clock that is typically provided by a highly accurate offchip crystal oscillator. This project i ...
isolation transformer
isolation transformer

BD2200GUL, BD2201GUL
BD2200GUL, BD2201GUL

... LOAD ...
A2150 - JL Audio
A2150 - JL Audio

... A wide range of signal input voltages can be accommodated by the A2150’s input section (200mV – 8V). This wide range is split up into two sub-ranges, accessible via a switch located to the left of the Input Connectors. The “Low” position on the “Input Voltage” switch selects an input sensitivity ran ...
Integrated Charger, Dual Main Step-Down Controllers, and Dual LDO Regulators MAX17085B General Description
Integrated Charger, Dual Main Step-Down Controllers, and Dual LDO Regulators MAX17085B General Description

... MAX17085B also includes output undervoltage, output overvoltage, and thermal-fault protection. ...
Grounding and Balancing for the Small Studio
Grounding and Balancing for the Small Studio

KNX PowerSupply 960 Manual
KNX PowerSupply 960 Manual

Op_amps.pdf
Op_amps.pdf

...  The signal input terminals are on the left – a positive input terminal Vp and a negative input terminal, Vn. However, the actual input voltages do not need to be positive and negative for inputs Vp and Vn, respectively.  In fact, the Vp input is usually referred to as the noninverting input inste ...
LTM4616 - Dual 8A per Channel Low VIN DC/DC uModule
LTM4616 - Dual 8A per Channel Low VIN DC/DC uModule

... switch mode DC/DC power regulator system in a 15mm × 15mm surface mount LGA or BGA package. Included in the package are the switching controller, power FETs, inductor and all support components. Operating from an input voltage range of 2.7V to 5.5V, the LTM4616 supports two outputs within a voltage ...
HF Resonators for Damping of VFTs in GIS
HF Resonators for Damping of VFTs in GIS

... terminations, VFTs have a non-harmonic time dependence and cover a wide frequency range from 100kHz-100MHz [1], [2]. As already reported in [2], they are presently a limiting constraint for the dielectric design of ultra high voltage (UHV) GIS with a rated voltage of 1100kV (AC). Therefore, the mode ...
HMC478MP86
HMC478MP86

Glossary of Power Supply Terms | CUI Inc
Glossary of Power Supply Terms | CUI Inc

... supply. Conducted is that energy sent down the AC line cord; radiated is sent into the air. Final equipment must meet both standards while many supplies may be rated only for conducted emissions. Hermetically sealed and contained (encapsulated) in a thermally conductive epoxy resin or similar plasti ...
TJA1050
TJA1050

... In the silent mode, the transmitter is disabled. All other IC functions continue to operate. The silent mode is selected by connecting pin S to VCC and can be used to prevent network communication from being blocked, due to a CAN controller which is out of control. ...
Issues Paper 18 - April 2017 - Australian Energy Regulator
Issues Paper 18 - April 2017 - Australian Energy Regulator

FJPF2145 ESBC Rated NPN Power Transistor ™
FJPF2145 ESBC Rated NPN Power Transistor ™

Dipoles For Dummies Part 3 -- Advanced
Dipoles For Dummies Part 3 -- Advanced

DPKC_Mod05_Part01_v08
DPKC_Mod05_Part01_v08

Overview of Sensor Signal Paths
Overview of Sensor Signal Paths

... have significant advantages over discrete implementations: better temperature drift, smaller PC-board (PCB) area, and the ability to handle wide common-mode ranges. Most current-sensing applications employ either the low-side or the high-side principle. In the low-side technique the sense resistor c ...
Stop-band limitations of the Sallen-Key, low
Stop-band limitations of the Sallen-Key, low

Solid-state NMR training course - New York Structural Biology Center
Solid-state NMR training course - New York Structural Biology Center

... High power tuning is more precise than wobbling, particularly for higher frequencies. If the isolation between channels is low (<15dB), the channels become coupled to each other and they have to be tuned simultaneously. It is possible only with the oscilloscope. You should always monitor reflected v ...
Stresa, Italy, 26-28 April 2006 MECHANICAL SYSTEMS BY THERMAL TRANSIENT METHODOLOGY
Stresa, Italy, 26-28 April 2006 MECHANICAL SYSTEMS BY THERMAL TRANSIENT METHODOLOGY

... others. Unfortunately to get information from deeper levels they are barely usable. We found that the thermal transient method [1] can be used in several MEMS devices to discover the etching problems. This analysis method and the T3Ster equipment [2], applying this, have been investigated and evalua ...
PCA9517A - Level Translating I2C Bus Repeater
PCA9517A - Level Translating I2C Bus Repeater

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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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