radio, television and electronics works
... There will be three papers, Papers 1, 2 and 3, all of which must be taken. Papers 1 and 2 shall be a composite paper to be taken at one sitting. PAPER 1: will consist of forty multiple-choice objective questions, all of which are to be answered in 45 minutes for 40 marks. PAPER 2: will consist of si ...
... There will be three papers, Papers 1, 2 and 3, all of which must be taken. Papers 1 and 2 shall be a composite paper to be taken at one sitting. PAPER 1: will consist of forty multiple-choice objective questions, all of which are to be answered in 45 minutes for 40 marks. PAPER 2: will consist of si ...
File lm1203 | allcomponents.ru
... VCC 2 is dependent upon the video output emitter pull down load. In applications that require video amplifier shut down because of fault conditions detected by monitor protection circuits, pin 11 and the wiper arms of the contrast and brightness controls can be grounded without harming the IC. This ...
... VCC 2 is dependent upon the video output emitter pull down load. In applications that require video amplifier shut down because of fault conditions detected by monitor protection circuits, pin 11 and the wiper arms of the contrast and brightness controls can be grounded without harming the IC. This ...
S0310
... combinations specifically designed to meet the critical needs of the life safety industry for voice and tone signaling. Available in compact, aesthetically pleasing package styles, each ET model covers both 25 or 70 volt audio systems. Their high-efficiency design provides improved evacuation signal ...
... combinations specifically designed to meet the critical needs of the life safety industry for voice and tone signaling. Available in compact, aesthetically pleasing package styles, each ET model covers both 25 or 70 volt audio systems. Their high-efficiency design provides improved evacuation signal ...
THEVENIN-NORTON THEOREM Definitions and Keywords
... Thevenin Theorem : Any two terminals of a network composed of linear passive and active circuit elements may be replaced by an equivalent voltage source and an equivalent series resistance. The voltage source is equal to the potential difference between the two terminals connected to these terminals ...
... Thevenin Theorem : Any two terminals of a network composed of linear passive and active circuit elements may be replaced by an equivalent voltage source and an equivalent series resistance. The voltage source is equal to the potential difference between the two terminals connected to these terminals ...
Low-Voltage, Low-Power and High Gain CMOS OTA
... circuit design techniques and advances in integrated circuits process technology. CMOS technology becomes attractive even for some applications that were traditionally built with bipolar transistors. As MOS channel length decreases, the transistor cut-o frequency ft increases and the realization of ...
... circuit design techniques and advances in integrated circuits process technology. CMOS technology becomes attractive even for some applications that were traditionally built with bipolar transistors. As MOS channel length decreases, the transistor cut-o frequency ft increases and the realization of ...
G:\respcare\gen_care
... where lines are attached there is a potential for current leakage. This leakage should flow down to the ground but if the patient is attached, he becomes the ground so that the current moves though him. o. Ampere: units of current p. “Macroshock”: a high current applied to the skin such as happens w ...
... where lines are attached there is a potential for current leakage. This leakage should flow down to the ground but if the patient is attached, he becomes the ground so that the current moves though him. o. Ampere: units of current p. “Macroshock”: a high current applied to the skin such as happens w ...
AN2118
... A major feature of this device is that when changing from on-hook to off-hook conditions (IL >0 mA), the VBAT voltage is automatically adjusted depending on the loop resistance and on the programmed current limitation value (ILIM). It should be noted that the device is optimized to operate on short ...
... A major feature of this device is that when changing from on-hook to off-hook conditions (IL >0 mA), the VBAT voltage is automatically adjusted depending on the loop resistance and on the programmed current limitation value (ILIM). It should be noted that the device is optimized to operate on short ...
File
... Adding components increases the total resistance of the circuit. This means that adding an extra bulb to a string of lights makes all of the bulbs ...
... Adding components increases the total resistance of the circuit. This means that adding an extra bulb to a string of lights makes all of the bulbs ...
FDFM2N111 Integrated N-Channel PowerTrench MOSFET and Schottky Diode
... DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF FAIRCHILD SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, or (c) whose failure to perform when p ...
... DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF FAIRCHILD SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, or (c) whose failure to perform when p ...
ch01
... EQUIVALENT CIRCUIT The battery supplies energy to charges. Lamp absorbs energy from charges. The net effect is an energy transfer ...
... EQUIVALENT CIRCUIT The battery supplies energy to charges. Lamp absorbs energy from charges. The net effect is an energy transfer ...
Document
... There really is only one main point in this lecture: namely that to analyze any circuit, we only need apply two rules: Kirchhoff’s Voltage and Current Rules. Kirchhoff’s Voltage Rule is essentially a statement of the conservation of energy: namely, if you start at any point on a circuit, and follow ...
... There really is only one main point in this lecture: namely that to analyze any circuit, we only need apply two rules: Kirchhoff’s Voltage and Current Rules. Kirchhoff’s Voltage Rule is essentially a statement of the conservation of energy: namely, if you start at any point on a circuit, and follow ...
TS6001G3-2.5DB Datasheet
... 4) An optional load resistor ≥ 5kΩ and capacitor up to 2200pF can be soldered on the board. Solder the resistor on pads R1 and the capacitor on pads C1. If a load is not desired, leave these pads open and proceed to step 5. 5) Turn on the power supply and check that the digital voltmeter is reading ...
... 4) An optional load resistor ≥ 5kΩ and capacitor up to 2200pF can be soldered on the board. Solder the resistor on pads R1 and the capacitor on pads C1. If a load is not desired, leave these pads open and proceed to step 5. 5) Turn on the power supply and check that the digital voltmeter is reading ...
Document
... Therefore, (vCa)peak ≈ 196+6.85=202.85 V. Because the system is balanced, the peak value should be the same for all phases. The required dc voltage should be Vdc ≥ 2(vCa ) peak = 405.7 V for the triangular-wave PWM or Vdc ≥ 3 (vCa ) peak = 351.35 V for the space vector PWM. 2. The instantaneous real ...
... Therefore, (vCa)peak ≈ 196+6.85=202.85 V. Because the system is balanced, the peak value should be the same for all phases. The required dc voltage should be Vdc ≥ 2(vCa ) peak = 405.7 V for the triangular-wave PWM or Vdc ≥ 3 (vCa ) peak = 351.35 V for the space vector PWM. 2. The instantaneous real ...
Applying PMDC motors
... tend to be abrasive. These properties limit their use to low speed, high voltage, fractional horsepower motor applications. Electro-graphitic brushes use a form of graphite developed from carbon subjected to intense heat. They have high current capacity, a relatively moderate voltage drop, and low a ...
... tend to be abrasive. These properties limit their use to low speed, high voltage, fractional horsepower motor applications. Electro-graphitic brushes use a form of graphite developed from carbon subjected to intense heat. They have high current capacity, a relatively moderate voltage drop, and low a ...
Heat guns - Technitel
... The Thermogun is available in a variety of voltage inputs and wattages. Also available is a comprehensive range of reflectors/adaptors for a variety of applications. A full range of spare parts is available upon request. The Raychem CV-1981 and CV-1983 guns are robust, double insulated and heavy dut ...
... The Thermogun is available in a variety of voltage inputs and wattages. Also available is a comprehensive range of reflectors/adaptors for a variety of applications. A full range of spare parts is available upon request. The Raychem CV-1981 and CV-1983 guns are robust, double insulated and heavy dut ...
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.