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a CMOS, 125 MHz Complete DDS Synthesizer AD9850
a CMOS, 125 MHz Complete DDS Synthesizer AD9850

TEMPERATURE DEPENDENT ELECTRIC FAN_0
TEMPERATURE DEPENDENT ELECTRIC FAN_0

... Pin 1 Pin 2 Pin 3 Pin 4 Pin 5 Pin 6 Pin 11 Pin 12 Pin 13 Pin 14 Pin 15 Pin 16 ...
Solid-state NMR training course - New York Structural Biology Center
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... 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 ...
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... interface with a microprocessor or microcontroller in thermal management applications. Essentially an 11-bit serial ADC with a sophisticated front end, the MAX6655/MAX6656 contain a switched-current source, a multiplexer, an ADC, an SMBus interface, and the associated control logic. Temperature data ...
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... Figure 5 - preamplifier resistor feedback .................................................................... 7 Figure 6 - CRRC shaper schematic ............................................................................ 7 Figure 7 - Block diagram of the track and hold ............................ ...
Complex Circuits 6.0 - University of Michigan–Dearborn
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... In this laboratory you will continue your exploration of dc electric circuits with a steady current. The circuits will be more complicated than in the previous lab, involving multibulb circuits in series, parallel and series/parallel combinations. The purpose of these exercises is to extend your und ...
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circulating currents in the delta connection, feasibility of
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... water cooled. In order to get a picture of the magnitude of the circulating current in the A impedance estimation is necessary. Figure 3 is a simplified illustration of the system modeled here. The resistance is calculated by splitting the lines from each transformer in 3 separate parts as indicated ...
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... Microsemi Corporation (Nasdaq: MSCC) offers a comprehensive portfolio of semiconductor and system solutions for communications, defense & security, aerospace and industrial markets. Products include high-performance and radiation-hardened analog mixed-signal integrated circuits, FPGAs, SoCs and ASIC ...
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... Exceeding any one or a combination of the Absolute Maximum Rating conditions may cause permanent damage to the device. Extended application of Absolute Maximum Rating conditions to the device may reduce device reliability. Specified typical performance or functional operation of the device under Abs ...
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... COM_ load configuration. Generally, the max input voltage is ±36V with ±15V supplies and a load referred to ground. For more detailed information see the NO_ Input Voltage section. Note 4: Guaranteed by design. Note 5: ΔRON = RON(MAX) - RON(MIN). Note 6: Leakage parameters are 100% tested at the max ...
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... EAM brake device and the relation of the voltage, the shear resistance force increased with the increase in voltage. And, when voltage was 700 V, the shear resistance force was 52.9 N. From those results, the linear EAM brake device has been confirmed that it was possible to adjust breaking force by ...
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... applicable. Moreover, since the UPFC parameters are computed after the load flow has converged, there is no way of knowing, during the iterative process, whether or not the UPFC parameters are within limits. Reference [4] takes the approach of modeling the UPFC as a series reactance. The voltage mag ...
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... high or low current can let you know if the circuit is overloaded or not fully operational. Current is always measured when the circuit is working (i.e: with power applied). It is measured IN SERIES with the circuit or component under test. The easiest way to measure current is to remove the fuse an ...
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... Divide-by-2 Static Dividers with InGaP GaAs HBT technology in 8 lead surface mount plastic packages. This device operates from DC (with a square wave input) to 12.5 GHz input frequency with a single +5V DC supply. The low additive SSB phase noise of -145 dBc/Hz at 100 kHz offset helps the user ...
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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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