Structure of Switching Power Supplies
... Non-stabilized DC power that has been rectified is converted to high-frequency pulses by a switching element (a transistor or MOSFET) using high-speed switching and sent to a transformer. The output voltage is detected and compared and feedback data provided to control the pulse widths to produce st ...
... Non-stabilized DC power that has been rectified is converted to high-frequency pulses by a switching element (a transistor or MOSFET) using high-speed switching and sent to a transformer. The output voltage is detected and compared and feedback data provided to control the pulse widths to produce st ...
LM2937 500 mA Low Dropout Regulator
... Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Electrical specifications do not apply when operating the device outside of its rated Operating Conditions. Note 2: The maximum allowable power dissipation at any ambient temperature is PMAX e (125 b TA)/iJ ...
... Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Electrical specifications do not apply when operating the device outside of its rated Operating Conditions. Note 2: The maximum allowable power dissipation at any ambient temperature is PMAX e (125 b TA)/iJ ...
Section H4: High-Frequency Transistor Models
... the collector voltage on the base current. Looking from the base, rb’c is at least equal to βοro, where βo is the value of β at low frequencies (sometimes called dc gain), and is typically on the order of 10βoro when the collector-base junction is reverse biased for normal active operational mode. N ...
... the collector voltage on the base current. Looking from the base, rb’c is at least equal to βοro, where βo is the value of β at low frequencies (sometimes called dc gain), and is typically on the order of 10βoro when the collector-base junction is reverse biased for normal active operational mode. N ...
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Tutorial 4
... Tutorial 4 1) A series connected electrical circuit has a resistance of 25 ohms & an inductance of 0.15H. It is connected to a 200v, 30 Hz supply. Determine: Inductive Reactance The impedance in Polar Form Current and circuit phase angle Voltage drop across resistor Voltage drop across ind ...
... Tutorial 4 1) A series connected electrical circuit has a resistance of 25 ohms & an inductance of 0.15H. It is connected to a 200v, 30 Hz supply. Determine: Inductive Reactance The impedance in Polar Form Current and circuit phase angle Voltage drop across resistor Voltage drop across ind ...
Tutorial #3 - UniMAP Portal
... b. Position D in Figure 1(a) is the highest frequency range of the oscillator. We can vary the frequency using ganged rheostats. What are the minimum and maximum frequencies of oscillation of this range? c. Determine the minimum and maximum frequency of oscillation for each position of the ganged sw ...
... b. Position D in Figure 1(a) is the highest frequency range of the oscillator. We can vary the frequency using ganged rheostats. What are the minimum and maximum frequencies of oscillation of this range? c. Determine the minimum and maximum frequency of oscillation for each position of the ganged sw ...
Relay Driver
... In many situations in which you use a relay, you will also need a bistable flipflop. One useful integrated circuit flip-flop is the 4013. (This i.c. actually contains two flip-flops.) With the connections as shown in the circuit below, when the voltage on pin 3 changes (rapidly) from 0v to the posit ...
... In many situations in which you use a relay, you will also need a bistable flipflop. One useful integrated circuit flip-flop is the 4013. (This i.c. actually contains two flip-flops.) With the connections as shown in the circuit below, when the voltage on pin 3 changes (rapidly) from 0v to the posit ...
HP 34401A MULTIMETER
... 1) Inductive Devices (e.g. transformers, chokes/inductors) induce very high transient voltages. 2) Measuring resistance: Avoid contacting probes with live circuits when in resistance modes. 3) Measuring Current: Do not connect probes across voltage source. ...
... 1) Inductive Devices (e.g. transformers, chokes/inductors) induce very high transient voltages. 2) Measuring resistance: Avoid contacting probes with live circuits when in resistance modes. 3) Measuring Current: Do not connect probes across voltage source. ...
OHMR
... versus I, line will also give the resistance, R. For non-ohmic resistances, V versus I is a non-linear relationship, and they have a varying resistance. The resistance at a particular point can be calculated using Ohm’s law, R = V/I, where V and I are the voltage and current at that point. ...
... versus I, line will also give the resistance, R. For non-ohmic resistances, V versus I is a non-linear relationship, and they have a varying resistance. The resistance at a particular point can be calculated using Ohm’s law, R = V/I, where V and I are the voltage and current at that point. ...
Name - mzaugg
... We have fuses or circuit breakers in our house to protect against too much current passing through the wires. Most circuits have a limit of 20 amperes of current. If this is exceeded, the circuit is broken. 4. Dizzy Dorey has all of the following appliances turned on in the same circuit. She has: ...
... We have fuses or circuit breakers in our house to protect against too much current passing through the wires. Most circuits have a limit of 20 amperes of current. If this is exceeded, the circuit is broken. 4. Dizzy Dorey has all of the following appliances turned on in the same circuit. She has: ...
40°C to 150°C Operating Junction Temperature Range
... version of the LTC3722-1, a phase-modulated full bridge DC/DC controller with adaptive or manual zero voltage switching (ZVS). The device’s ZVS delay control and adjustable synchronous rectification timing optimize efficiency while reducing transformer size and electromagnetic interference, making i ...
... version of the LTC3722-1, a phase-modulated full bridge DC/DC controller with adaptive or manual zero voltage switching (ZVS). The device’s ZVS delay control and adjustable synchronous rectification timing optimize efficiency while reducing transformer size and electromagnetic interference, making i ...
Lab 2 - Full wave rectifier
... The transfer function for a filter is given as a ratio of Vout/Vin, calculate the transfer function of the filter above. (Hint: The impedance of the capacitor can be though of as the resistance of the capacitor. Knowing this use KVL.) ...
... The transfer function for a filter is given as a ratio of Vout/Vin, calculate the transfer function of the filter above. (Hint: The impedance of the capacitor can be though of as the resistance of the capacitor. Knowing this use KVL.) ...
CMOS ANALOG CIRCUIT DESIGN
... Course Outcomes After studying this course the students would gain enough knowledge ...
... Course Outcomes After studying this course the students would gain enough knowledge ...
Chapter 7: Electricity Study Guide
... 5. A disadvantage to using fuses is that when it burns out it ________________________________________. 6._______________________ causes charges in a circuit to move. 7. The build up of charges on an object is called _________________________________________. 8. A connection that allows current to t ...
... 5. A disadvantage to using fuses is that when it burns out it ________________________________________. 6._______________________ causes charges in a circuit to move. 7. The build up of charges on an object is called _________________________________________. 8. A connection that allows current to t ...
LAB4 SP222 11
... The electrical resistance R of a conductor is defined as the ratio of the potential difference, or voltage, V, applied across the conductor to the current I that passes through it: R=V . I If the conductor is made of a homogeneous material formed into a shape of uniform cross-sectional area A and le ...
... The electrical resistance R of a conductor is defined as the ratio of the potential difference, or voltage, V, applied across the conductor to the current I that passes through it: R=V . I If the conductor is made of a homogeneous material formed into a shape of uniform cross-sectional area A and le ...
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.