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CHAPTER 9 DATA ACQUISITION
CHAPTER 9 DATA ACQUISITION

Channel stop implant
Channel stop implant

... • The intercept of this line on the VG axis is VT(lin.). • The slope gives us kN(lin.). • While the characteristics are approximately linear at low gate bias, at high gate biases the drain current increases sub-linearly. • The transconductance can be obtained by differentiating ID with respect to VG ...
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PDF

HART 1401 - Basic Electricity for HVAC
HART 1401 - Basic Electricity for HVAC

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BDTIC 1N457/A Small Signal Diode
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Chapter 7: Troubleshooting PV Systems
Chapter 7: Troubleshooting PV Systems

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The input voltage

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... conversion is  1/2 bit. – Missing codes or the imperfections where increasing voltage does not result in the next step being output are described as non-monotonicity. – Errors in A/D conversion may be significant particularly if the full range of the analog signal is significantly less than the ran ...
Optical Communications Laboratory
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... senses: gustatory (taste), olfactory (smell), tactile, auditory, and visual. The better approach, however, is to decide what volitional (or even non-volitional) actions of the user will be important for the particular computer application. In other words, it is important to decide what gestures by t ...
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... values, and it would be completely impractical to expect any manufacturer to produce every single value and make these available for sale. The manufacturers actually produce a much smaller number of resistors but cover the same range. This subset of resistors are perfectly adequate for 99.9% of all ...
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Lab Date:__/__/__ Lab Time:____ Partner: Name:

... Laboratory 1 & 2 Combined: An introduction to the digital multimeter. Connecting the test leads: Voltage: The meter measures the voltage difference (or electrical pressure difference) between the voltage at the “V " input and the voltage at the “COM” input. Generally, the red lead is inserted into ...
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... output structure. Integrating the Hall circuit and the amplifier on a single chip minimizes many of the problems normally associated with low voltage level analog signals. High precision in output levels is obtained by internal gain and offset trim adjustments made at end-of-line during the manufact ...
Design and Implementation of Class B Power Amplifier for 5kW
Design and Implementation of Class B Power Amplifier for 5kW

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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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