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A Compact Switched-Capacitor Regulated Charge Pump
A Compact Switched-Capacitor Regulated Charge Pump

... statement is true, the output does have a ripple equal to the offset of the operational amplifier. This ripple does not exist in the presented topology because the charge pump is in the discharge phase while the reference is sampling the ...
HC9
HC9

... 1. Open Circuit Inductance (OCL) Test Parameters: 100kHz, 1.0Vrms, 0.0Adc, @ +25°C 2. Irms: DC current for an approximately ∆T of 40°C without core loss. Derating is necessary for AC currents. Pad layout, trace thickness and width, airflow, and proximity of other heat generating components wil ...
Experiment # 1 - GWU`s SEAS - The George Washington University
Experiment # 1 - GWU`s SEAS - The George Washington University

... voltage drop across each resistor. 3. Measure the current through each resistor in the circuit. Note, it is impossible to measure the current ‘across’ a resistor, you must use the DMM differently when measuring current. Ask you GTA how if you do not remember. 4. Measure the total current (I1) used b ...
MTW6N100E Power MOSFET 6 Amps, 1000 Volts
MTW6N100E Power MOSFET 6 Amps, 1000 Volts

GOLDMUND MIMESIS SRM2.3 MONO AMPLIFIER
GOLDMUND MIMESIS SRM2.3 MONO AMPLIFIER

... 2+, MIMESIS 22M, MIMESIS 7.5), and even if you have carefully selected the proper line phase (see in next paragraph), there is a possibility to again increase the sonic quality of your speakers by reverting the polarity of both speaker cables at amp termination. But since the line phase and the spea ...
Small Lab Equipment
Small Lab Equipment

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LM311 datasheet - Department of Electrical Engineering

Ch09_PPT_Fund_Elec_Circ_5e
Ch09_PPT_Fund_Elec_Circ_5e

... form of electrical power that is delivered to homes and industry. • In the late 1800’s there was a battle between proponents of DC and AC. • AC won out due to its efficiency for long distance transmission. • AC is a sinusoidal current, meaning the current reverses at regular times and has alternatin ...
a 60 MHz, 2000 V/ Monolithic Op Amp AD844
a 60 MHz, 2000 V/ Monolithic Op Amp AD844

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... Find the value of unknown resistance X and the current drawn by the circuit from the battery, if no current flows through the galvanometer. Assume the resistance per unit length of the wire AB to be 0.01 Ω/cm. [3 Ω, I = 2.8 A] In the circuit diagram given below AB is a uniform wire of resistance 10 ...
Title - Georgia Tech IEN
Title - Georgia Tech IEN

... 2. If a thermistor were placed in an electrical circuit with constant DC voltage applied, what would be the effect of current through the circuit if the thermistor was heated up? The current should increase because the heat is causing the temperature to decrease. 3. What is the resistance on your th ...
LMX2216 0.1 GHz to 2.0 GHz Low Noise Amplifier/Mixer 0.1
LMX2216 0.1 GHz to 2.0 GHz Low Noise Amplifier/Mixer 0.1

... The LNA input and output ports are designed to interface to a 50X system. The Mixer input ports are matched to 50X. The output port is matched to 200X. The only external components required are DC blocking capacitors. The balanced architecture of the LMX2216 maintains consistent operating parameters ...
GATE TURN OFF THYRISTOR (GTO):
GATE TURN OFF THYRISTOR (GTO):

... identical to those of an SCR in the first quadrant. The triac can be operated with either positive or negative gate controlled voltage but in normal operation usually the gate voltage is positive in Quadrant I and Negative in Quadrant III. The supply voltage at which the triac is turned on depends u ...
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... circuit ensuring best operation performance of this application circuit. Very often the DCDC converters are powered from voltage rails where the voltage varies to a large extent. This voltage variation usually defines the topology of the DCDC converters and the parameters for its input circuit, main ...
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... The Megger TTR20 is an automatic hand-held battery operated transformer turns ratio test set. It is used to measure the turns ratio, excitation current and polarity of windings in single- and three-phase distribution and power transformers (tested phase by phase), potential & current transformers, a ...
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technical information

... where RIN = Input resistor value in ohms. Input Capacitor Selection CIN can be calculated once a value for RIN has been determined. CIN and RIN determine the input low-frequency pole. Typically this pole is set at 10 Hz. CIN is calculated according to: CIN = 1/((2π x FP)(RIN + 5000)) where: RIN = In ...
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Word Document - UCSD VLSI CAD Laboratory

... output for Vin = 0 V, and 5V respectively. What is the function of Tr4? What is the function of R20? What minimum Vin would you expect to turn the oscillator on? Experiment 1: (Exercise 1, chapter 9) Testing the beeper circuit 1) Test the beeper circuit using the function generator. First set up the ...
6/98 - UCSD VLSI CAD Laboratory
6/98 - UCSD VLSI CAD Laboratory

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MAX16910C9 Evaluation Kit Evaluates: MAX16910C General Description Features

... to 3.3V or 5V using jumper JU3. To configure the EV kit circuit for fixed output mode, install a shunt across pins 2-3 on jumper JU2. Place a shunt across pins 1-2 on JU3 for the 5V preset output. Place a shunt across pins 2-3 for the 3.3V preset output. In adjustable output-voltage mode, the output ...
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GEFL Ceiling PIR Presence Detector

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All-round flashing lights 30 Joules PMF 2030

ECE122 – Digital Electronics & Design
ECE122 – Digital Electronics & Design

... principle) after the input voltages have been applied for an infinite amount of time. DC Transfer Analysis: It is used to study the voltage or current at one set of points in a circuit as a function of the voltage or current at another set of points. This is done by sweeping the source variables ove ...
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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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