SNAPPAC - Extron Company
... A commutating (free wheeling) diode is also included in the power module to provide a path for current during phase back operation as well as helping minimize D.C. output ripple. The SCR firing circuit controls the phase angle firing of the SCR's in response to signals from the regulator circuitry. ...
... A commutating (free wheeling) diode is also included in the power module to provide a path for current during phase back operation as well as helping minimize D.C. output ripple. The SCR firing circuit controls the phase angle firing of the SCR's in response to signals from the regulator circuitry. ...
PAM2327 Description Pin Assignments
... This formula has a maximum at VIN =2VOUT, where IRMS = IOUT/2. This simple worst -case condition is commonly used for design because even significant deviations do not offer much relief. Note that the capacitor manufacturer's ripple current ratings are often based on 2000 hours of life. This makes i ...
... This formula has a maximum at VIN =2VOUT, where IRMS = IOUT/2. This simple worst -case condition is commonly used for design because even significant deviations do not offer much relief. Note that the capacitor manufacturer's ripple current ratings are often based on 2000 hours of life. This makes i ...
University of Pune FACULTY OF ENGINEERING T.E. Electrical
... Parallel operation of 3-phase alternators: Necessity, conditions, Load sharing between two alternators in parallel. Parallel-Generator theorem. Process of synchronizing alternator with infinite bus-bar by lamp methods and by use of synchroscope. Synchronizing torque, power and current. Unit 03: Thre ...
... Parallel operation of 3-phase alternators: Necessity, conditions, Load sharing between two alternators in parallel. Parallel-Generator theorem. Process of synchronizing alternator with infinite bus-bar by lamp methods and by use of synchroscope. Synchronizing torque, power and current. Unit 03: Thre ...
Method for measurement of the sensitivity of crystal resonators to
... where ω3 is the 3dB bandwidth of the crystal network. Note that for high Q resonators, in which case ω3 << ωv, the expression becomes identical to the oscillator case. This is confirmed by practical measurements, where the sideband levels are essentially the same for a resonator when measured by the ...
... where ω3 is the 3dB bandwidth of the crystal network. Note that for high Q resonators, in which case ω3 << ωv, the expression becomes identical to the oscillator case. This is confirmed by practical measurements, where the sideband levels are essentially the same for a resonator when measured by the ...
KM3518071813
... The dynamic voltage restorer (DVR) has become popular as a cost effective and efficient solution for the protection of sensitive loads from voltage sags. This paper reports a novel control scheme for DVR to achieve fast response and effective sag compensation capabilities. The DVR, which is placed i ...
... The dynamic voltage restorer (DVR) has become popular as a cost effective and efficient solution for the protection of sensitive loads from voltage sags. This paper reports a novel control scheme for DVR to achieve fast response and effective sag compensation capabilities. The DVR, which is placed i ...
VCXO AND HDTV SET-TOP CLOCK SOURCE MK3771
... the PC board has excessive stray capacitance and a new PCB layout should be considered to reduce stray capacitance. (Alternately, the crystal may be re-specified to a higher load capacitance. Contact IDT for details.) If the centering error is more than 25ppm positive, add identical fixed centering ...
... the PC board has excessive stray capacitance and a new PCB layout should be considered to reduce stray capacitance. (Alternately, the crystal may be re-specified to a higher load capacitance. Contact IDT for details.) If the centering error is more than 25ppm positive, add identical fixed centering ...
PAM8320 Description Pin Assignments
... Power and Heat Dissipation Speakers must be chosen to withstand the large output power from the PAM8320, otherwise speaker damage may occur. Heat dissipation is very important when the device works in full power operation. Two factors affect the heat dissipation, the efficiency of the device that de ...
... Power and Heat Dissipation Speakers must be chosen to withstand the large output power from the PAM8320, otherwise speaker damage may occur. Heat dissipation is very important when the device works in full power operation. Two factors affect the heat dissipation, the efficiency of the device that de ...
Determination of Voltage Stability Index using Eigen Ratio
... is similar to that mentioned in[2], whose value varies from zero and one. Mohammed et. al., [8] derived line stability index factor termed as LQP to assess the voltage stability. It indicates the stability of the system with respect to changes in the reactive power. LQP should be maintained less tha ...
... is similar to that mentioned in[2], whose value varies from zero and one. Mohammed et. al., [8] derived line stability index factor termed as LQP to assess the voltage stability. It indicates the stability of the system with respect to changes in the reactive power. LQP should be maintained less tha ...
TC508 Technical Training
... a. TX Baseband Processing The audio signals input from MIC are divided into two parts. One part enters U601, and is then converted into digital signal by analog-to-digital conversion (ADC). Afterwards, the converted signal will go through a series of processing including lowpass filtering, AGC, comp ...
... a. TX Baseband Processing The audio signals input from MIC are divided into two parts. One part enters U601, and is then converted into digital signal by analog-to-digital conversion (ADC). Afterwards, the converted signal will go through a series of processing including lowpass filtering, AGC, comp ...
° µ REF3112 REF3120
... REF31xx to momentarily draw currents greater than the typical quiescent current. This can be prevented by using a power supply with a fast rising edge and low output impedance. ...
... REF31xx to momentarily draw currents greater than the typical quiescent current. This can be prevented by using a power supply with a fast rising edge and low output impedance. ...
III. power factor correction
... and non linear loads, these waveforms become distorted. In order to quantify the distortion, the term of Total Harmonics Distortion (THD) is used [2]. Voltage and current harmonic produced by nonlinear loads increase power losses and, therefore, have a negative impact on electric utility distributio ...
... and non linear loads, these waveforms become distorted. In order to quantify the distortion, the term of Total Harmonics Distortion (THD) is used [2]. Voltage and current harmonic produced by nonlinear loads increase power losses and, therefore, have a negative impact on electric utility distributio ...
Single-stage, universal-input ac/dc led driver with current
... presents one of the most cost-effective single-stage solutions. In this converter, a PFC boost stage is integrated with the dc/dc flyback stage. The PFC boost stage operates in discontinuous conduction mode (DCM), while the dc/dc flyback stage operates at the DCM/continuous-conduction-mode (CCM) bou ...
... presents one of the most cost-effective single-stage solutions. In this converter, a PFC boost stage is integrated with the dc/dc flyback stage. The PFC boost stage operates in discontinuous conduction mode (DCM), while the dc/dc flyback stage operates at the DCM/continuous-conduction-mode (CCM) bou ...
AN1318 Interfacing Semiconductor Pressure Sensors
... into 0.47 µF provide approximately a 5 msec ramp time from zero to 5 V. Assuming zero pressure on the sensor, inputs to both comparators U2A and U2B are at the same voltage. Therefore, as the ramp voltage sweeps from zero to 5 V, both PA0 and PA1 will go low at the same time when the ramp voltage ex ...
... into 0.47 µF provide approximately a 5 msec ramp time from zero to 5 V. Assuming zero pressure on the sensor, inputs to both comparators U2A and U2B are at the same voltage. Therefore, as the ramp voltage sweeps from zero to 5 V, both PA0 and PA1 will go low at the same time when the ramp voltage ex ...
FSA8058 Audio Jack Detection and Configuration Switch with Moisture Sensing
... The FSA8058 is an audio jack detection switch for 3-pole and 4-pole accessories. The FSA8058 features moisture sensing, which prevents false positive detection of accessories in the audio jack. The FSA8058 also features an integrated MIC switch that allows a processor to configure attached accessori ...
... The FSA8058 is an audio jack detection switch for 3-pole and 4-pole accessories. The FSA8058 features moisture sensing, which prevents false positive detection of accessories in the audio jack. The FSA8058 also features an integrated MIC switch that allows a processor to configure attached accessori ...
Experiment 4
... When mutual induction is permitted between two coils or windings, a change in current flowing through one coil induces a voltage upon the other coil. All transformers have a primary winding and one or more secondary windings. The electromagnetic coupling between the primary and secondary windings al ...
... When mutual induction is permitted between two coils or windings, a change in current flowing through one coil induces a voltage upon the other coil. All transformers have a primary winding and one or more secondary windings. The electromagnetic coupling between the primary and secondary windings al ...
FEATURES DESCRIPTION D
... cutoff frequency. This allows the video signals to pass without any visible distortion, as shown in Figure 3 through Figure 5. The video DACs embedded in TI’s Digital Media Processors over-sample at 27MHz. At this frequency, the attenuation is typically 21dB, which effectively attenuates the samplin ...
... cutoff frequency. This allows the video signals to pass without any visible distortion, as shown in Figure 3 through Figure 5. The video DACs embedded in TI’s Digital Media Processors over-sample at 27MHz. At this frequency, the attenuation is typically 21dB, which effectively attenuates the samplin ...
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.