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MAX5387 Evaluation System Evaluates: General Description Features
MAX5387 Evaluation System Evaluates: General Description Features

... When a number is entered into the edit boxes, it can be sent to the device by pressing the Enter key. It is also sent when Tab or Shift + Tab is pressed. ...
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... • Bridge Rectifier D2 for full-wave rectification of the 24 VAC input. • Smoothing capacitor C2 to reduce the pulsating DC ripple voltage on the rectified output and limit the minimum DC voltage at the ripple valley. • Voltage divider R3/R7 to monitor the auxiliary input voltage and provide an auxil ...
MAX12528 Dual, 80Msps, 12-Bit, IF/Baseband ADC General Description Features
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By BARRY SCHWEID, AP Diplomatic Writer
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... The Market Direction section highlights key products and marketing opportunities. Intended to be a practical tool to help you design-in Vishay components, this section provides information about technical specifications, product benefits, lead-times, applications, and target markets. Where possible, ...
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... systems that are essential to reactor shutdown, containment isolation and heat removal, reactor core cooling, and preventing a significant release of radioactive material to the environment. The EPSS distributes power to safety-related and non-safety-related plant loads during normal and abnormal op ...
2.5 Electrical Power 2.5.1 Class 1E Emergency Power Supply System
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... technology is near 1fF). Furthermore, different combinations of consecutive gates were tested. Fig. 3 shows all possible gate type combinations along with valid parameters ranges. Normalized delay of gates in our library shows that the delay can change by up to 240% (2.4X) due to a 12.5% variation of ...
Instruction Manual
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... connect to slip rings. The slip rings are in contact with two brushes. When the loop rotates, it cuts magnetic lines of force, first in one direction, and then the other. As the conductor passes through the magnetic field, the magnetic field induces a voltage in the conductor and the slip rings cond ...
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... Advanced Interconnect Matrix (AIM) The Advanced Interconnect Matrix is a highly connected low power rapid switch. The AIM is directed by the software to deliver up to a set of 40 signals to each FB for the creation of logic. Results from all FB macrocells, as well as, all pin inputs circulate back t ...
Low-Frequency Noise Measurements with the E4727A
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... circuit. Noise considerations are also important on the signal-creation side. For example, an ultralow noise voltage reference circuit provides a temperature stable bias voltage that may be applied to a digital to analog converter (DAC), the active element inside a low noise oscillator, a low noise ...
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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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