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BD8312HFN
BD8312HFN

High-voltage switch using series-connected
High-voltage switch using series-connected

INTEGRATED CIRCUITS
INTEGRATED CIRCUITS

Frequency Response with LTspice IV - csserver
Frequency Response with LTspice IV - csserver

... Figure 1: Example Circuit After clicking on the Run Simulation icon, the Edit Simulation Command dialog will appear as shown in Figure 2. Select the AC Analysis tab. In Figure 2 parameters are set to perform an AC Analysis on frequencies between 10 Hz and 1 kHz. The analysis will be performed at 30 ...
Evaluates:  MAX8606 MAX8606 Evaluation Kit General Description Features
Evaluates: MAX8606 MAX8606 Evaluation Kit General Description Features

... goes low when a valid input source is detected at IN. A valid input source is one whose voltage is between 4V and 5.8V. After a valid input has been established, charging is sustained with inputs as low as 3.5V as long as the input voltage remains above the battery voltage by at least 50mV. POK is h ...
Series – Parallel Dc Circuits
Series – Parallel Dc Circuits

embedded controlled multi level voltage source inverter based
embedded controlled multi level voltage source inverter based

... harmonic components (generally lower order) are eliminated (Yao and Xiao, 2013; Singh and Arga, 2014). Alternatively, the switching angles can be calculated by using some optimization based technique so that Total ...
High-Voltage Power Delivery Through Charge Recycling
High-Voltage Power Delivery Through Charge Recycling

... regulator consists of a power transistor whose gate voltage is controlled by a feedback error amplifier which keeps the output voltage a constant by adjusting the current through the power transistor to meet changing load requirements [5]. The energy efficiency of such a linear regulator is limited ...
MIC2860-D - Microchip
MIC2860-D - Microchip

File - Mohammed Al Nasser e
File - Mohammed Al Nasser e

Design and Stability Analysis of Buck-Boost Converter
Design and Stability Analysis of Buck-Boost Converter

Diagnostic News A  E
Diagnostic News A E

... major faults, while there should  be little impact on smaller  faults.  For example, the 1000  mA fault reduced to just 500 mA  at 2 kHz, indicating that a lesser  frequency may be optimal to  avoid interpretation problems.  At lower frequencies there is  better discrimination between  smaller and b ...
Self Oscillating Circuit for CFL10W and CFL18W Lamps APPLICATION NOTE AN99065
Self Oscillating Circuit for CFL10W and CFL18W Lamps APPLICATION NOTE AN99065

... In the underlying report a description is given of an electronic instant-start CFL1 circuit. Furthermore, a printed circuit board is available (PR39742). The circuit is a Voltage Fed Half Bridge, which has been optimized to drive a standard Philips PL-C10W and PLC18W lamp or similar lamp types. The ...
MMST3904
MMST3904

... otherwise dispose of the same, no express or implied right or license to practice or commercially exploit any intellectual property rights or other proprietary rights owned or controlled by ROHM CO., LTD. is granted to any such buyer. Products listed in this document are no antiradiation design. ...
Quick Controller Instructions (rough draft)
Quick Controller Instructions (rough draft)

... Decide the purpose of the controller, and the hysteresis. 0.1V hysteresis is good for most dump load controllers. 0.6V hysteresis is good for most LVDs. Set the pot from the ground pin (away from the screw) to middle pit to about 2.7K ohms. This will be close to 14V. Solder in the pot and ZD1 at the ...
MAX7044 300MHz to 450MHz High-Efficiency, Crystal-Based +13dBm ASK Transmitter General Description
MAX7044 300MHz to 450MHz High-Efficiency, Crystal-Based +13dBm ASK Transmitter General Description

... oscillate with a different load capacitance is used, the crystal is pulled away from its intended operating frequency, thus introducing an error in the reference frequency. Crystals designed to operate with higher differential load capacitance always pull the reference frequency higher. For example, ...
GENERAL@ ELECTRIC
GENERAL@ ELECTRIC

lect18_f03
lect18_f03

... • However, we can use the frequency dependence of the impedances (reactances) to answer this question. • The reactance of an inductor = XL = wL. • The reactance of a capacitor = XC = 1/(wC). • Therefore, • in the low frequency limit, XL  0 and XC   . • Therefore, as w  0, the current will flow m ...
EE 100 – Electrical Engineering Concepts I Lab 2 Name: Partner
EE 100 – Electrical Engineering Concepts I Lab 2 Name: Partner

... We need to determine the resistance setting for the 100k pot, such that when V = 10 volts, the ammeter will have a full-scale deflection, i.e. 1 mA flowing through it. Since Rm is negligible, the calculation is just RPOT = V / i ,where V = 10 volts and i = 1 mA. So, R100k POT = 10 kΩ. Build the HVM ...
MAX1639 High-Speed Step-Down Controller with Synchronous Rectification for CPU Power ________________General Description
MAX1639 High-Speed Step-Down Controller with Synchronous Rectification for CPU Power ________________General Description

... size, and efficiency while staying within the worst-case specification limits for stress-related parameters, such as capacitor ripple current. The MAX1639 circuit was designed for the specified frequencies. Do not change the switching frequency with- ...
weighted total harmonic distortion
weighted total harmonic distortion

... compared to lower order. This indicates that higher order harmonics are not sever as lower one. However THD does not consider severity of lower order harmonics and treat all harmonic equally. In this regard another measuring index is proposed in addition to THD is weighted total harmonic distortion ...
MAX1917 Tracking, Sinking and Sourcing, Synchronous Buck General Description
MAX1917 Tracking, Sinking and Sourcing, Synchronous Buck General Description

... 5µA, the MAX1917 is the best choice for low-power notebook applications, as well as servers and desktop computers. An all N-FET design optimizes efficiency. The MAX1917 can also be used for generating VDDR and as a general-purpose step-down controller with variable switching frequency as high as 1MH ...
720301 Electrical Instruments and Measurements
720301 Electrical Instruments and Measurements

instruction manual
instruction manual

... hazards. Before connecting the test leads; turn off the power to the circuit under test; set the meter to the desired function and range; connect the test leads to the meter first, then connect to the circuit under test. Reapply power. If an erroneous reading is observed, disconnect power immediatel ...
International Research Journal of Applied and Basic Sciences www.irjabs.com
International Research Journal of Applied and Basic Sciences www.irjabs.com

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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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