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TPS2376-H 数据资料 dataSheet 下载
TPS2376-H 数据资料 dataSheet 下载

... Inrush current limiting prevents current drawn by the bulk capacitor from causing the line voltage to sag below the lower UVLO threshold. Adjustable inrush current limiting allows the use of arbitrarily large capacitors and also accommodates legacy systems that require low inrush currents. The ILIM ...
Lecture 5 - web page for staff
Lecture 5 - web page for staff

... An SCR cannot be switched off by simply removing the gate voltage. Commutation circuitry can be used for satisfying either of the conditions for switching off an SCR. ...
MCR01 Series Datasheet
MCR01 Series Datasheet

... 1) Extremely small and light Area ratio is 60% smaller than that of chip 1608, while weight ratio has been cut 75%. 2) Highly reliable chip resistor Ruthenium oxide dielectric offers superior resistance to the elements. 3) Electrodes not corroded by soldering Thick film makes the electrodes very str ...
What Are Solid-State Temperature Sensors?
What Are Solid-State Temperature Sensors?

... These devices only require a simple voltage or current measurement and linear calculation to scale the signal to temperature. Consider using semiconductors when price is a factor and you have a very specific temperature range in mind. Taking their name from the solid material of their construction, ...
AD9945 数据手册DataSheet 下载
AD9945 数据手册DataSheet 下载

... The AD9945 is a complete analog signal processor for CCD applications. It features a 40 MHz single-channel architecture designed to sample and condition the outputs of interlaced and progressive scan area CCD arrays. The AD9945’s signal chain consists of a correlated double sampler (CDS), a digitall ...
Power supply of industrial enterprises Laboratory work Open
Power supply of industrial enterprises Laboratory work Open

STK672-630AN-E
STK672-630AN-E

... When ENABLE=0: Motor current goes OFF, and excitation drive output is forcibly turned OFF. The system clock inside the HIC stops at this time, with no effect on the HIC even if input pins other than RESET input vary. In addition, since current does not flow to the motor, the motor shaft becomes free ...
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... NMOS transistor TID experiment IV curve shifts negatively due to radiation induced holes accumulated in oxide. Since buried oxide are thicker than gate oxide, the main source of holes accumulation is in buried oxide. By applying a negative voltage, the leakage current and threshold voltage can be re ...
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I. Introduction

... Recently, current mode circuits have been receiving significant attention in analog signal processing. A useful function block for high frequency current mode applications is a current conveyor. The current conveyor is a three terminal device performing many useful analog signal processing functions ...
OICA Draft Proposal for the ELSA
OICA Draft Proposal for the ELSA

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Measuring MOSFET Gate Resistance

MAX8848Y/MAX8848Z High-Performance Negative Charge Pump EVALUATION KIT AVAILABLE
MAX8848Y/MAX8848Z High-Performance Negative Charge Pump EVALUATION KIT AVAILABLE

... over the full 1-cell Li+ battery voltage range even with large LED forward voltage mismatch. The 1MHz fixedfrequency switching allows for tiny external components. The regulation scheme is optimized to ensure low EMI and low input ripple. The MAX8848Y/MAX8848Z include thermal shutdown, open- and sho ...
ADD8754 数据手册DataSheet 下载
ADD8754 数据手册DataSheet 下载

... requiring only external charge pump components to provide all the requirements for panel power, VCOM, and gate modulation. Included in a single chip are a high frequency step-up dc-to-dc switching regulator, logic voltage regulator, VCOM amplifier, and gate pulse modulation circuitry. The step-up dc ...
Analog Devices Welcomes Hittite Microwave Corporation www.analog.com www.hittite.com
Analog Devices Welcomes Hittite Microwave Corporation www.analog.com www.hittite.com

Calibration of AC resistance thermometry bridges traceable to
Calibration of AC resistance thermometry bridges traceable to

... Calibrated reference resistors can be used (with AC or DC instruments) to check calibration. The calibration uncertainty available (values from national institutes) on these resistors is typically 0.05 ppm DC and 0.5 ppm AC. It appears therefore that this technique will not work as well with AC inst ...
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TT-1015 Internal Black Bulb Temperature Sensors RH-600

PDF Format - College of Computing
PDF Format - College of Computing

Analog and Mixed Signal Circuits On Digital CMOS Processes
Analog and Mixed Signal Circuits On Digital CMOS Processes

... can be made about element geometry. Transistor models and simulation tools can have problems not seen in digital simulations. Simulator accuracy of charge conservation and linearity of transistor models are frequently sources of error. Examination of changes in transistor performance due to short ch ...
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How to Improve Power Factor, Voltage Regulation

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1 3 4 PRECISION ABSOLUTE VALUE CIRCUITS

AP7335A-50 N E W P R O D U C T 300mA, LOW QUIESCENT
AP7335A-50 N E W P R O D U C T 300mA, LOW QUIESCENT

... 4. Stresses greater than the 'Absolute Maximum Ratings' specified above, may cause permanent damage to the device. These are stress ratings only; functional operation of the device at these or any other conditions exceeding those indicated in this specification is not implied. Device reliability may ...
PD166015GR  Data Sheet MOS INTEGRATED CIRCUIT
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... The PD166015 is an N-channel high side driver with built-in charge pump and embedded protection function. It is also a linear solenoid driver with a built-in differential amplifier. When device is overtemperature or overcurrent is generated in output MOS, the protection function operates to prevent ...
University Physics 227N/232N Current and Ohm`s Law, Resistors
University Physics 227N/232N Current and Ohm`s Law, Resistors

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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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