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13 - Northern Highlands
13 - Northern Highlands

Using Electricity Revision Questions
Using Electricity Revision Questions

Data Book 1 - Talking Electronics
Data Book 1 - Talking Electronics

... If the Zener diode is rated at 5.6V and the applied voltage is 8.0V, then with no load applied, the output voltage across R1 will be 5.6V and the remaining 2.4V will be dropped across Rs, If the input voltage is changed to 9.0V, then the voltage across the Zener will remain at 5.6V. In practice, th ...
USING ELECTRICITY
USING ELECTRICITY

AC Generators
AC Generators

... Any change in current causes a corresponding change in the magnetic field surrounding the conductor. Current is constant in DC, except when the circuit is turned on and off, or when there is a load change. Current is constantly changing in AC, so inductance is a continual factor. A change in the mag ...
Self-induced Oscillations in Si and Other Semiconductors
Self-induced Oscillations in Si and Other Semiconductors

Chapter 3
Chapter 3

... In general, there are two types of transistors commonly used: Field Effect (FET) and Bipolar Junction (BJT). This problem will use a BJT. A BJT is a three terminal device, where the input current into one terminal (the base) affects the current flowing out of a second terminal (the collector). The t ...
LM2524D/LM3524D Regulating Pulse Width Modulator
LM2524D/LM3524D Regulating Pulse Width Modulator

... calculate outgoing quality level. Note 5: Absolute maximum ratings indicate limits beyond which damage to the device may occur. DC and AC electrical specifications do not apply when operating the device beyond its rated operating conditions. Note 6: Pins 1, 4, 7, 8, 11, and 14 are grounded; Pin 2 e ...
Sensing Elements for Current Measurements
Sensing Elements for Current Measurements

Nodal analysis, which is based on Kichhoff current law (KCL)
Nodal analysis, which is based on Kichhoff current law (KCL)

... In general, there are two types of transistors commonly used: Field Effect (FET) and Bipolar Junction (BJT). This problem will use a BJT. A BJT is a three terminal device, where the input current into one terminal (the base) affects the current flowing out of a second terminal (the collector). The t ...
a Quad 3000 V/ Current Feedback Amplifier AD8004
a Quad 3000 V/ Current Feedback Amplifier AD8004

... temporarily may cause a shift in parametric performance due to a change in the stresses exerted on the die by the package. Exceeding a junction temperature of +175°C for an extended period can result in device failure. While the AD8004 is internally short circuit protected, this may not be sufficien ...
Analogue-Theory-and-Circuit-Analysis
Analogue-Theory-and-Circuit-Analysis

... say that we have direct current, abbreviated as dc. On the other hand, a current that varies with time, reversing direction periodically, is called alternating current, abbreviated as ac. ...
AVOP-ELEKTRO-BER-003
AVOP-ELEKTRO-BER-003

... What is the polarity of the voltage drop across R2? The positive current is being „pumped“ by the voltage V1 = +1 V from the left side of the picture towards the right side. This is why the left ends of the resistors are more positive than their right ends. We can draw small plus signs to the left e ...
X-19s User Manual
X-19s User Manual

DOC - Robotics Engineering CTE502
DOC - Robotics Engineering CTE502

... introduction to electronics, I’ll keep them relatively simple to start with. They’ll get more complex as we go along Resistances in Series This is a series circuit. In series circuits, there is only one path for electricity to flow. As electrons are pushed through this circuit they will flow through ...
MAX1558/MAX1558H Dual, 3mm x 3mm, 1.2A/Programmable-Current USB Switches with Autoreset General Description
MAX1558/MAX1558H Dual, 3mm x 3mm, 1.2A/Programmable-Current USB Switches with Autoreset General Description

... condition, which reduces system load current and power dissipation. If a short circuit persists for 20ms, the output turns off and the fault flag is set. The autoreset circuit automatically restarts the part if the fault is removed. ...
Section Questions
Section Questions

- Landis+Gyr
- Landis+Gyr

... to the current, the line side terminals may be wired at either the top or bottom of the socket block assembly.This flexibility is helpful in retrofit installations where the service entrance is upgraded and the line conductors are not long enough to reach the top terminals of the socket. ...
TPS40020 数据资料 dataSheet 下载
TPS40020 数据资料 dataSheet 下载

... The device controls the delays from main switch off to rectifier turn on and from rectifier turn off to main switch turn on in a way that minimizes diode losses (both conduction and recovery) in the synchronous rectifier. The reduction in these losses is significant and can mean that for a given con ...
DRV8801-Q1 DMOS Full-Bridge Motor Drivers
DRV8801-Q1 DMOS Full-Bridge Motor Drivers

... The control input, nSLEEP, is used to minimize power consumption when the DRV8801-Q1 device is not in use. The nSLEEP input disables much of the internal circuitry, including the internal voltage rails and charge pump. nSLEEP is asserted logic low. A logic high on this input pin results in normal op ...
DC Electrical Characteristics of MM74HC High-Speed CMOS Logic
DC Electrical Characteristics of MM74HC High-Speed CMOS Logic

... provided, large static voltages appearing across any two pins of a MOS IC could cause damage. However, the new input protection which takes full advantage of the “HC” silicon-gate process has been carefully designed to reduce the susceptibility of these high-speed CMOS circuits to oxide rupture due ...
Current and Voltage
Current and Voltage

15 Single-phase series ac circuits
15 Single-phase series ac circuits

... When XL = XC (Figure 15.12(d)), the applied voltage V and the current I are in phase. This effect is called series resonance (see Section 15.7) Problem 15. A coil of resistance 5  and inductance 120 mH in series with a 100 µF capacitor, is connected to a 300 V, 50 Hz supply. Calculate (a) the curre ...
Behavior of HV Cable of Power Supply at Short Circuit And Related
Behavior of HV Cable of Power Supply at Short Circuit And Related

UCC28220 数据资料 dataSheet 下载
UCC28220 数据资料 dataSheet 下载

... approximately 150 µA of current and forcing pins, SS, CS1, CS2, OUT1, and OUT2 to logic 0 states. If the VDD falls below 8 V after reaching turn-on, it will go back into this low power state. In the case of the UCC28221, the UVLO threshold is 13 V. It is 10 V for the UCC28220. Both versions have a t ...
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TRIAC



TRIAC, from triode for alternating current, is a genericized tradename for an electronic component that can conduct current in either direction when it is triggered (turned on), and is formally called a bidirectional triode thyristor or bilateral triode thyristor.TRIACs are a subset of thyristors and are closely related to silicon controlled rectifiers (SCR). However, unlike SCRs, which are unidirectional devices (that is, they can conduct current only in one direction), TRIACs are bidirectional and so allow current in either direction. Another difference from SCRs is that TRIAC current can be enabled by either a positive or negative current applied to its gate electrode, whereas SCRs can be triggered only by positive current into the gate. To create a triggering current, a positive or negative voltage has to be applied to the gate with respect to the MT1 terminal (otherwise known as A1).Once triggered, the device continues to conduct until the current drops below a certain threshold called the holding current.The bidirectionality makes TRIACs very convenient switches for alternating-current (AC) circuits, also allowing them to control very large power flows with milliampere-scale gate currents. In addition, applying a trigger pulse at a controlled phase angle in an AC cycle allows control of the percentage of current that flows through the TRIAC to the load (phase control), which is commonly used, for example, in controlling the speed of low-power induction motors, in dimming lamps, and in controlling AC heating resistors.
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