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OPA445 High Voltage FET-Input FEATURES DESCRIPTION
OPA445 High Voltage FET-Input FEATURES DESCRIPTION

... operating conditions. The combination of low closed-loop gain and capacitive load will decrease the phase margin and may lead to gain peaking or oscillations. Figure 3 shows a circuit which preserves phase margin with capacitive load. The circuit does not suffer a voltage drop due to load current; h ...
2SK241 FM Tuner, VHF and RF Amplifier Applications
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... • TOSHIBA is continually working to improve the quality and reliability of its products. Nevertheless, semiconductor devices in general can malfunction or fail due to their inherent electrical sensitivity and vulnerability to physical stress. It is the responsibility of the buyer, when utilizing TOS ...
Chapter_5 - UniMAP Portal
Chapter_5 - UniMAP Portal

... components in which the components are connected such that they provide a single path between two points. Short A circuit condition in which there is zero or an abnormally low resistance between two points; usually an inadvertent condition. Voltage divider A circuit consisting of series resistors ac ...
TSM931 - Silicon Labs
TSM931 - Silicon Labs

... peak-to-peak noise of about 0.3mVPP while the reference voltage produces a peak-to-peak noise of about 1mVPP. Furthermore, it is important to design a layout that minimizes capacitive coupling from a given output to the reference pin as crosstalk can add noise and as a result, degrade performance. ...
A Topical Index of TI Supply Voltage Supervisor
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... In a power-supply design, tolerance in component values and reference voltages and currents causes deviation to the desired system output. However, the deviation of the system output resulting from a variation of each input variation is different. The output is more sensitive to certain inputs than ...
Digital Circuit I (EEI 101)
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... Most waveforms encountered in digital systems are composed of series of pulses, sometimes called pulse trains, and can be classified as either periodic or nonperiodic. A periodic pulse waveform is one that repeats itself at a fixed interval, called a period (T). The frequency (f) is the rate at whic ...
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stgipq8c60t-hz - STMicroelectronics

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D2400 GPRS Manual
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... This input is 30V tolerant and 5V logic compatible.  It has an internal 100K resistor pull‐up connected  to 5V and is designed to work with 5V logic outputs, NO and NC voltage‐free contacts and open  collector outputs.  If the ON/OFF input is left unconnected when the jumper is not fitted, the power ...
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... negative supply rail to within 2.2 V of the positive supply rail. The input common-mode voltage can be found as the average of the voltage at the two inputs of the device. To ensure the fastest response time, care should be taken not to allow the input common-mode voltage to exceed either of these v ...
Construct an LED Headlamp
Construct an LED Headlamp

... even as the battery voltage varies. In its simplest form, this can be achieved using a circuit comprised of only 2 resistors and 2 transistors. This circuit can maintain a constant current to the LED as long as the battery voltage is at least 0.6V greater than that of the LED at the desired current. ...
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... with visual indicator, and provides EMI/RFI filtering. It meets Federal Grade A, Class 1, Mode 1 guidelines for power line surge suppressors and withstands at least 1000 occurrences of surge pulse voltages, up to 6000 volts. SentryPlus™ auto shutdown and monitoring software is also included with SU- ...
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Neural Computation Practical 2: The Hodgkin

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View/Open - Library@Atmiya

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Power Components Simplify 1 kW Power Design

电路笔记 CN-0086  利用
电路笔记 CN-0086 利用

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电路笔记 CN-0087 利用

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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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