Transformer
... The word ‘transformer’ comes form the word ‘transform’. Transformer is not an energy conversion device, but it is device that changes AC electrical power at one voltage level into AC electrical power at another voltage level through the action of magnetic field but with a proportional increase or de ...
... The word ‘transformer’ comes form the word ‘transform’. Transformer is not an energy conversion device, but it is device that changes AC electrical power at one voltage level into AC electrical power at another voltage level through the action of magnetic field but with a proportional increase or de ...
Underclocking: Monarch Manual Clock and Voltage Setting
... There are two commands that can be issued to change either Frequency or Voltage. Although it is possible to set the exact Voltage on the card, the same cannot be done regarding Frequency, as the chips main oscillator is a Ring oscillator. Hence for Frequency, indexes are used, and it is known that a ...
... There are two commands that can be issued to change either Frequency or Voltage. Although it is possible to set the exact Voltage on the card, the same cannot be done regarding Frequency, as the chips main oscillator is a Ring oscillator. Hence for Frequency, indexes are used, and it is known that a ...
Design of a Regenerative Receiver for the Short-Wave - Inictel-UNI
... is the device's gm (transconductance) tendency to increase with output current, making it very difficult to obtain a smooth regeneration control. Small gm’s facilitate gain control. Hence, lower operating-point currents. The idea is to have perhaps some 60% of the required gain for oscillation with ...
... is the device's gm (transconductance) tendency to increase with output current, making it very difficult to obtain a smooth regeneration control. Small gm’s facilitate gain control. Hence, lower operating-point currents. The idea is to have perhaps some 60% of the required gain for oscillation with ...
Rectifying diodes application
... The smoothing capacitor converts the full-wave rippled output of the rectifier into a smooth DC output voltage. Two important parameters to consider when choosing a suitable a capacitor are top of the DC voltage. Too low a value and the capacitor has little effect. As a general rule of thumb, we ar ...
... The smoothing capacitor converts the full-wave rippled output of the rectifier into a smooth DC output voltage. Two important parameters to consider when choosing a suitable a capacitor are top of the DC voltage. Too low a value and the capacitor has little effect. As a general rule of thumb, we ar ...
Infra Red Door Monitor System
... module will recognize there is no more infrared signal and it will produce a constant high voltage (+5V) as the input of the receiver circuit. ...
... module will recognize there is no more infrared signal and it will produce a constant high voltage (+5V) as the input of the receiver circuit. ...
Voltage/current dividers
... right, if RL is attached in parallel with R2, the voltage across R1 doubles. What is the value of RL? From the two expressions for v’R1 ...
... right, if RL is attached in parallel with R2, the voltage across R1 doubles. What is the value of RL? From the two expressions for v’R1 ...
Electricity Notes
... Advantages of parallel circuits… There are two main reasons why parallel circuits are used more commonly than series circuits: 1) Extra appliances (like bulbs) can be added without affecting the output of the others 2) If one appliance breaks it won’t affect the others ...
... Advantages of parallel circuits… There are two main reasons why parallel circuits are used more commonly than series circuits: 1) Extra appliances (like bulbs) can be added without affecting the output of the others 2) If one appliance breaks it won’t affect the others ...
BSNL(JTO) Examination 2006
... (d) It combines voltage control features of MOSFET gate and high power capability of bipolar transistor Q.36 The semiconductor used for LEDs emitting in the visible range is (a) GaAs (b) GaAlAs (c) GalnAs (d) GaAsP Q.37 The polar bonds existing in III-V compound semicondutor, may be considered as eq ...
... (d) It combines voltage control features of MOSFET gate and high power capability of bipolar transistor Q.36 The semiconductor used for LEDs emitting in the visible range is (a) GaAs (b) GaAlAs (c) GalnAs (d) GaAsP Q.37 The polar bonds existing in III-V compound semicondutor, may be considered as eq ...
First Oscillators Sheet
... 3. The "Two-Inverter" oscillator with R = 1 k, C = 100 nF. The diodes may be assumed to have clamping diodes limiting the output voltage swing to -0.7 V and + 5.7 V (with 0 V and 5 V supplies). Assume the transition voltage to be 2 V. Scenario 1: No "clamping diodes". NB Opposite order to question b ...
... 3. The "Two-Inverter" oscillator with R = 1 k, C = 100 nF. The diodes may be assumed to have clamping diodes limiting the output voltage swing to -0.7 V and + 5.7 V (with 0 V and 5 V supplies). Assume the transition voltage to be 2 V. Scenario 1: No "clamping diodes". NB Opposite order to question b ...
DWYER INSTRUMENTS, INC.
... The maximum length of connecting wire between the transmitter and the receiver is a function of wire size and receiver resistance. That portion of the total current loop resistance represented by the resistance of the connecting wires themselves should not exceed 10% of the receiver resistance. For ...
... The maximum length of connecting wire between the transmitter and the receiver is a function of wire size and receiver resistance. That portion of the total current loop resistance represented by the resistance of the connecting wires themselves should not exceed 10% of the receiver resistance. For ...
Effective Decoupling Radius of Decoupling Capacitor
... quantitative measure of effectiveness Some people suggest a effective range of /10, where is the wavelength at the series resonance frequency To provide a quantitative measure to assess the effectiveness ...
... quantitative measure of effectiveness Some people suggest a effective range of /10, where is the wavelength at the series resonance frequency To provide a quantitative measure to assess the effectiveness ...
Low Voltage Sequential Circuit With a Ring Oscillator Clock
... • The total power dissipation varies linearly with clock frequency and quadratically with supply voltage. • In idle periods a microprocessor is optimized to run at a lowvoltage and less than maximum speed to save power. • Generally, a power management unit controls this operation and reduces the Vdd ...
... • The total power dissipation varies linearly with clock frequency and quadratically with supply voltage. • In idle periods a microprocessor is optimized to run at a lowvoltage and less than maximum speed to save power. • Generally, a power management unit controls this operation and reduces the Vdd ...
Mutual / Self-Induction – Learning Outcomes
... Mains electricity is generated at low voltage, then a “step-up transformer” increases the voltage for national transmission. A “step-down transformer” is then used to reduce the voltage to ~230 V for local use. Many appliances (e.g. tvs, computers, microwaves) will not work well at 230 V, so wil ...
... Mains electricity is generated at low voltage, then a “step-up transformer” increases the voltage for national transmission. A “step-down transformer” is then used to reduce the voltage to ~230 V for local use. Many appliances (e.g. tvs, computers, microwaves) will not work well at 230 V, so wil ...
Capacitor Power Supply - electronics hobby
... Zener diode is used to generate a regulated DC output. A Zener diode is designed to operate in the reverse breakdown region. If a silicon diode is reverse biased, a point reached where its reverse current suddenly increases. The voltage at which this occurs is known as “Avalanche or Zener “value of ...
... Zener diode is used to generate a regulated DC output. A Zener diode is designed to operate in the reverse breakdown region. If a silicon diode is reverse biased, a point reached where its reverse current suddenly increases. The voltage at which this occurs is known as “Avalanche or Zener “value of ...
2E7 Engineering Science: Electrical Engineering
... with the source driving an electric circuit. Thus the question of vectors having magnitude and phase did not arise. However, in the case of the analysis of ac circuits, the concept of voltages and currents as vectors is fundamental as the sources driving circuits will essentially be sinusoidal or at ...
... with the source driving an electric circuit. Thus the question of vectors having magnitude and phase did not arise. However, in the case of the analysis of ac circuits, the concept of voltages and currents as vectors is fundamental as the sources driving circuits will essentially be sinusoidal or at ...
Mutual / Self-Induction * Learning Outcomes
... Mains electricity is generated at low voltage, then a “step-up transformer” increases the voltage for national transmission. A “step-down transformer” is then used to reduce the voltage to ~230 V for local use. Many appliances (e.g. tvs, computers, microwaves) will not work well at 230 V, so wil ...
... Mains electricity is generated at low voltage, then a “step-up transformer” increases the voltage for national transmission. A “step-down transformer” is then used to reduce the voltage to ~230 V for local use. Many appliances (e.g. tvs, computers, microwaves) will not work well at 230 V, so wil ...
Stresa, Italy, 26-28 April 2006
... external voltage source Vin through the switch SW1 when Cv is at its maximum Cmax. When Cv is charged to Vin, SW1 is opened and then the capacitance is changed form Cmax to Cmin due to the electrode displacement caused by vibration. In this process, the charge Q on the capacitor remains constant (SW ...
... external voltage source Vin through the switch SW1 when Cv is at its maximum Cmax. When Cv is charged to Vin, SW1 is opened and then the capacitance is changed form Cmax to Cmin due to the electrode displacement caused by vibration. In this process, the charge Q on the capacitor remains constant (SW ...
Module 12 – Power Supplies, Batteries, Radio Frequency
... What is one way to recharge a 12-volt leadacid station battery if the commercial power is out? (T0A08) • A. Cool the battery in ice for several hours • B. Add acid to the battery • C. Connect the battery to a car’s battery and run the engine • D. All of these choices are correct ...
... What is one way to recharge a 12-volt leadacid station battery if the commercial power is out? (T0A08) • A. Cool the battery in ice for several hours • B. Add acid to the battery • C. Connect the battery to a car’s battery and run the engine • D. All of these choices are correct ...
Benefits of Voltage Optimisation
... used will not necessarily improve performance. A device that has been designed to work anywhere in Europe, such as our electric fire, has an optimum operating point of 220V. Above this voltage and at the UK supply average of 242V, the fire will deliver its heat output of 1kW plus some, but the addit ...
... used will not necessarily improve performance. A device that has been designed to work anywhere in Europe, such as our electric fire, has an optimum operating point of 220V. Above this voltage and at the UK supply average of 242V, the fire will deliver its heat output of 1kW plus some, but the addit ...
A Carrier-Based PWM Strategy With the Offset Voltage Injection for
... single-phase three-level NPC converters is the fluctuation of the neutral-point voltage. In this paper, a capacitor voltage balancing technique is proposed that injects an offset voltage into the sinusoidal modulating signals of the conventional carrier-based pulsewidth modulation (CBPWM) method. Fu ...
... single-phase three-level NPC converters is the fluctuation of the neutral-point voltage. In this paper, a capacitor voltage balancing technique is proposed that injects an offset voltage into the sinusoidal modulating signals of the conventional carrier-based pulsewidth modulation (CBPWM) method. Fu ...
Today’s Topics - Department of Electrical Engineering
... Motors, Generators and Transformers with very different sizes and nominal values. To be able to compare the performances of a big and a small element, per unit system is used. In per unit system, each electric quantity is measured as a decimal fraction of some base level ...
... Motors, Generators and Transformers with very different sizes and nominal values. To be able to compare the performances of a big and a small element, per unit system is used. In per unit system, each electric quantity is measured as a decimal fraction of some base level ...
Spark-gap transmitter
A spark-gap transmitter is a device that generates radio frequency electromagnetic waves using a spark gap.Spark gap transmitters were the first devices to demonstrate practical radio transmission, and were the standard technology for the first three decades of radio (1887–1916). Later, more efficient transmitters were developed based on rotary machines like the high-speed Alexanderson alternators and the static Poulsen Arc generators.Most operators, however, still preferred spark transmitters because of their uncomplicated design and because the carrier stopped when the telegraph key was released, which let the operator ""listen through"" for a reply. With other types of transmitter, the carrier could not be controlled so easily, and they required elaborate measures to modulate the carrier and to prevent transmitter leakage from de-sensitizing the receiver. After WWI, greatly improved transmitters based on vacuum tubes became available, which overcame these problems, and by the late 1920s the only spark transmitters still in regular operation were ""legacy"" installations on naval vessels. Even when vacuum tube based transmitters had been installed, many vessels retained their crude but reliable spark transmitters as an emergency backup. However, by 1940, the technology was no longer used for communication. Use of the spark-gap transmitter led to many radio operators being nicknamed ""Sparks"" long after they ceased using spark transmitters. Even today, the German verb funken, literally, ""to spark,"" also means ""to send a radio message or signal.""