chapter 1 - UniMAP Portal
... Contamination by extraneous signals from human sources. E.g. from other transmitters, power lines and machineries. Occurs most often in radio systems whose receiving antennas usually intercept several signals at the same time One type of noise. ...
... Contamination by extraneous signals from human sources. E.g. from other transmitters, power lines and machineries. Occurs most often in radio systems whose receiving antennas usually intercept several signals at the same time One type of noise. ...
Microelectronics System Design for Chronic Brain Implants
... The Configuration and Control block will be given a command (binary bit stream) that it must interpret and power down those amplification stages that are not needed, shutting off particular probe lines. It then relays the sequence of probe lines to be sampled to the multiplexer. The switching freque ...
... The Configuration and Control block will be given a command (binary bit stream) that it must interpret and power down those amplification stages that are not needed, shutting off particular probe lines. It then relays the sequence of probe lines to be sampled to the multiplexer. The switching freque ...
talk
... Power reduction is a critical design goal in modern chip design. Power reduction can be implemented through the use of parallelism and reduced supply voltage ...
... Power reduction is a critical design goal in modern chip design. Power reduction can be implemented through the use of parallelism and reduced supply voltage ...
Inverter - UniMAP Portal
... b) Multiple pulse width modulation - MPWM -By using several pulses, (p=5) The harmonic content are reduced compared to single fo will set the output PWM frequency while fc will - the DF isdetermines also reduced the pulses per half cycle,p. significantly. ...
... b) Multiple pulse width modulation - MPWM -By using several pulses, (p=5) The harmonic content are reduced compared to single fo will set the output PWM frequency while fc will - the DF isdetermines also reduced the pulses per half cycle,p. significantly. ...
(But Were Afraid To Ask) Part 1
... negative for the other half-cycle. As illustrated in Figure 1, one complete AC voltage waveform cycle occurs every 1/60th of a second (or 16.67 milliseconds), which can also be termed as 60 cycles per second or 60 Hertz (Hz). This is known as the fundamental frequency. Unlike the AC voltage waveform ...
... negative for the other half-cycle. As illustrated in Figure 1, one complete AC voltage waveform cycle occurs every 1/60th of a second (or 16.67 milliseconds), which can also be termed as 60 cycles per second or 60 Hertz (Hz). This is known as the fundamental frequency. Unlike the AC voltage waveform ...
TSM-HV50 Thyristor-Module for dynamic Power Factor Correction
... The TSM-HV50 for Dynamic PFC is a fast electronically controlled self-observing thyristor switch for capacitive loads up to 60 kvar (690AC) which is capable to switch PFC capacitors within a few milliseconds as often and as long as required without abrasion. Triggering can be done by means of dynami ...
... The TSM-HV50 for Dynamic PFC is a fast electronically controlled self-observing thyristor switch for capacitive loads up to 60 kvar (690AC) which is capable to switch PFC capacitors within a few milliseconds as often and as long as required without abrasion. Triggering can be done by means of dynami ...
78ET-1 - Marine Engineering Study Materials
... leads are reduced to 10 and 5 respectively. Find the voltage across each lamp and the extra load on the generator due to the earths. The resistance of the supply cables and the ship’s hull may be neglected and that of the lamps taken as constant at the value corresponding to the 15W rating. 6. A 2 ...
... leads are reduced to 10 and 5 respectively. Find the voltage across each lamp and the extra load on the generator due to the earths. The resistance of the supply cables and the ship’s hull may be neglected and that of the lamps taken as constant at the value corresponding to the 15W rating. 6. A 2 ...
A Frequency Controlled LCL - T Resonant Converter for H
... experimental results of the power converter are presented in this paper. ...
... experimental results of the power converter are presented in this paper. ...
D N IAGNOSTIC EWS
... motor stators rated as low as 440 V. In this article I will concentration the effect of the voltage source type of pulse width modulated (PWM) IFDs on stators rated about 2400 V and above. These stators are usually if the “form wound” type. Unlike the situation in low voltage motors, PD is not the o ...
... motor stators rated as low as 440 V. In this article I will concentration the effect of the voltage source type of pulse width modulated (PWM) IFDs on stators rated about 2400 V and above. These stators are usually if the “form wound” type. Unlike the situation in low voltage motors, PD is not the o ...
FWJ-(20-30)A14F
... allows the calculation of the power losses at load currents lower than the rated current . The correction factor, K p , is given as a function of the RMS load current, Ib , in % of the rated current . ...
... allows the calculation of the power losses at load currents lower than the rated current . The correction factor, K p , is given as a function of the RMS load current, Ib , in % of the rated current . ...
GSR - switching regulator modules High-efficiency step-down switching regulator modules
... The switching frequency is internally fixed at 250 kHz for GS-R12F and 500 kHz for GS-R12FP. The GSR modules include all the components required to drive the ST embedded regulator, providing a plug and play-like point of regulation. The main features common to the GSR family are: pulse-by-pulse and ...
... The switching frequency is internally fixed at 250 kHz for GS-R12F and 500 kHz for GS-R12FP. The GSR modules include all the components required to drive the ST embedded regulator, providing a plug and play-like point of regulation. The main features common to the GSR family are: pulse-by-pulse and ...
AGENDA ITEM:____
... Imax: Maximum output current under any noncapacitive load, including short circuit, and with overcurrent protection bypassed if used. Where a transformer limits the output current, Imax limits apply after 1 minute of operation. Where a current-limiting impedance, listed for the purpose, or as part o ...
... Imax: Maximum output current under any noncapacitive load, including short circuit, and with overcurrent protection bypassed if used. Where a transformer limits the output current, Imax limits apply after 1 minute of operation. Where a current-limiting impedance, listed for the purpose, or as part o ...
MAX730A/MAX738A/MAX744A 5V, Step-Down, Current-Mode PWM DC-DC Converters __________________General Description
... 750mA. The MAX744A guarantees 500mA load capability for inputs above 6V and has tighter oscillator frequency limits for low-noise (radio) applications. The MAX730A accepts inputs between 5.2V and 11V and delivers 450mA for inputs above 6V. Typical efficiencies are 85% to 96%. Quiescent supply curren ...
... 750mA. The MAX744A guarantees 500mA load capability for inputs above 6V and has tighter oscillator frequency limits for low-noise (radio) applications. The MAX730A accepts inputs between 5.2V and 11V and delivers 450mA for inputs above 6V. Typical efficiencies are 85% to 96%. Quiescent supply curren ...
Square_Wave_Sources
... There appears to be a rise and fall time (TR and TF, respectively) that is used by PSpice even when you set these values to 0s. This results from the use of the default Step Ceiling when setting the parameters for the Transient Analysis. ...
... There appears to be a rise and fall time (TR and TF, respectively) that is used by PSpice even when you set these values to 0s. This results from the use of the default Step Ceiling when setting the parameters for the Transient Analysis. ...
Bipolar transistors II, Page 1 Bipolar Transistors II
... Figure 4: Feedback Voltage Regulator. load conditions are variable. These can give output impedances less than an ohm and high stability against temperature variation. Figure 4 is a common example of a negative-feedback circuit. Transistor Q1 is normally conducting because of the bias current throug ...
... Figure 4: Feedback Voltage Regulator. load conditions are variable. These can give output impedances less than an ohm and high stability against temperature variation. Figure 4 is a common example of a negative-feedback circuit. Transistor Q1 is normally conducting because of the bias current throug ...
Mass 24/25-2
... Charging Lithium Ion batteries Although Lithium Ion batteries are increasingly popular, there can be a lack of clarity when it comes to the charging process. This is not a problem with Mastervolt as the Mastervolt battery chargers communicate directly with the Lithium Ion battery via the integrated ...
... Charging Lithium Ion batteries Although Lithium Ion batteries are increasingly popular, there can be a lack of clarity when it comes to the charging process. This is not a problem with Mastervolt as the Mastervolt battery chargers communicate directly with the Lithium Ion battery via the integrated ...
Pulse-width modulation
Pulse-width modulation (PWM), or pulse-duration modulation (PDM), is a modulation technique used to encode a message into a pulsing signal. Although this modulation technique can be used to encode information for transmission, its main use is to allow the control of the power supplied to electrical devices, especially to inertial loads such as motors. In addition, PWM is one of the two principal algorithms used in photovoltaic solar battery chargers, the other being MPPT.The average value of voltage (and current) fed to the load is controlled by turning the switch between supply and load on and off at a fast rate. The longer the switch is on compared to the off periods, the higher the total power supplied to the load.The PWM switching frequency has to be much higher than what would affect the load (the device that uses the power), which is to say that the resultant waveform perceived by the load must be as smooth as possible. Typically switching has to be done several times a minute in an electric stove, 120 Hz in a lamp dimmer, from few kilohertz (kHz) to tens of kHz for a motor drive and well into the tens or hundreds of kHz in audio amplifiers and computer power supplies.The term duty cycle describes the proportion of 'on' time to the regular interval or 'period' of time; a low duty cycle corresponds to low power, because the power is off for most of the time. Duty cycle is expressed in percent, 100% being fully on.The main advantage of PWM is that power loss in the switching devices is very low. When a switch is off there is practically no current, and when it is on and power is being transferred to the load, there is almost no voltage drop across the switch. Power loss, being the product of voltage and current, is thus in both cases close to zero. PWM also works well with digital controls, which, because of their on/off nature, can easily set the needed duty cycle.PWM has also been used in certain communication systems where its duty cycle has been used to convey information over a communications channel.