R302 Receiver, made before Oct 2007
... All crystals age a little over a long period of time; so it is customary to tweak any receiver back onto the precise channel frequency once a year during routine maintenance. Because modern solid state equipment doesn’t require much routine maintenance, many receivers don’t get their oscillators twe ...
... All crystals age a little over a long period of time; so it is customary to tweak any receiver back onto the precise channel frequency once a year during routine maintenance. Because modern solid state equipment doesn’t require much routine maintenance, many receivers don’t get their oscillators twe ...
M3001A MMS (Multiple Monitoring System)
... As mentioned previously in PDR, the OMT frequency range lies between 40Hz and 120Hz Use of a high pass filter at 20Hz, and a low pass filter at 150Hz We identified the main source of noise as that coming from various power lines across the room A notch filter is used (bandstop) for the frequ ...
... As mentioned previously in PDR, the OMT frequency range lies between 40Hz and 120Hz Use of a high pass filter at 20Hz, and a low pass filter at 150Hz We identified the main source of noise as that coming from various power lines across the room A notch filter is used (bandstop) for the frequ ...
Optimizing 1200V IGBT Modules for High Frequency Applications
... also features reduced turn-off losses compared to standard industrial devices making it suitable pure hard switching applications requiring high PWM frequencies such as sinusoidal output inverters for alternate energy utility interface and high precision industrial motor drives. I. INTRODUCTION The ...
... also features reduced turn-off losses compared to standard industrial devices making it suitable pure hard switching applications requiring high PWM frequencies such as sinusoidal output inverters for alternate energy utility interface and high precision industrial motor drives. I. INTRODUCTION The ...
On the Ongoing Evolution of Very High Frequency Power Supplies
... those VHF amplifiers convert the constant supply voltages into a high-frequent voltage by operating power semiconductors in the cut-off or saturation region only. The major difference is, that VHF amplifiers do not convert the energy back into a constant voltage or current level. Numerous research w ...
... those VHF amplifiers convert the constant supply voltages into a high-frequent voltage by operating power semiconductors in the cut-off or saturation region only. The major difference is, that VHF amplifiers do not convert the energy back into a constant voltage or current level. Numerous research w ...
2016China International Conferenceon Electricity Distribution
... a new power conversion equipment, which is based on power electronic converter and high frequency link. SST has the advantage of voltage regulation, reactive power compensation, bi-directional power flow control features etc[3-5]. SST has been regarded as one of the ten most emerging technologies in ...
... a new power conversion equipment, which is based on power electronic converter and high frequency link. SST has the advantage of voltage regulation, reactive power compensation, bi-directional power flow control features etc[3-5]. SST has been regarded as one of the ten most emerging technologies in ...
IOSR Journal of Electrical and Electronics Engineering(IOSR-JEEE) e-ISSN: 2278-1676, p-ISSN: 2320-3331
... loops. First one is current control loop based on a synchronous reference frame which acts as an inner loop and another one is power control loop based on the conventional PI regulators which acts as on outer loop. In order to maintain the microgrid voltage and frequency within the regulating limit ...
... loops. First one is current control loop based on a synchronous reference frame which acts as an inner loop and another one is power control loop based on the conventional PI regulators which acts as on outer loop. In order to maintain the microgrid voltage and frequency within the regulating limit ...
Advanced Mechanical, Electrical and ANNEX I APS12 Technical Teaching Equipment
... lot of possibilities about synchronous generator regulation. Besides, once the manual control is completed, the user can return control to the AVR. 5. Manual and automatic control of generator speed. The APS12´s Automatic Voltage Regulator is ready to transfer the generator/turbine speed control to ...
... lot of possibilities about synchronous generator regulation. Besides, once the manual control is completed, the user can return control to the AVR. 5. Manual and automatic control of generator speed. The APS12´s Automatic Voltage Regulator is ready to transfer the generator/turbine speed control to ...
LTC1069-1 - Low Power, 8th Order Progressive Elliptic, Lowpass Filter
... single or dual supply operation, an analog ground plane surrounding the package is recommended. The analog ground plane should be connected to any digital ground at a single point. For dual supply operation Pin 1 should be connected to the analog ground plane. For single supply operation Pin 1 shoul ...
... single or dual supply operation, an analog ground plane surrounding the package is recommended. The analog ground plane should be connected to any digital ground at a single point. For dual supply operation Pin 1 should be connected to the analog ground plane. For single supply operation Pin 1 shoul ...
ISSCC 2016 Digest of Technical Papers
... applications such as high-fidelity 3D copying. 3D cameras that employ lightdetection-and-ranging (lidar) units offer better spatial and depth resolution compared to radar- and ultrasonic-based cameras [1-5]. While depth is measured in common lidar architectures using the round-trip delay of a short ...
... applications such as high-fidelity 3D copying. 3D cameras that employ lightdetection-and-ranging (lidar) units offer better spatial and depth resolution compared to radar- and ultrasonic-based cameras [1-5]. While depth is measured in common lidar architectures using the round-trip delay of a short ...
AN2048
... Characterization results As we can see from Figure 9, 10 and 11, we can achieve a minimum gain of 12 dB with an input return loss better than 5 dB and a drain efficiency between 55% and 65% over the frequency band 445 ÷ 475 MHz. Even so the output power can be controlled through Vgs, a minimum of 15 ...
... Characterization results As we can see from Figure 9, 10 and 11, we can achieve a minimum gain of 12 dB with an input return loss better than 5 dB and a drain efficiency between 55% and 65% over the frequency band 445 ÷ 475 MHz. Even so the output power can be controlled through Vgs, a minimum of 15 ...
Utility frequency
The utility frequency, (power) line frequency (American English) or mains frequency (British English) is the frequency of the oscillations of alternating current (AC) in an electric power grid transmitted from a power plant to the end-user. In large parts of the world this is 50 Hz, although in the Americas and parts of Asia it is typically 60 Hz. Current usage by country or region is given in the list of mains power around the world.During the development of commercial electric power systems in the late 19th and early 20th centuries, many different frequencies (and voltages) had been used. Large investment in equipment at one frequency made standardization a slow process. However, as of the turn of the 21st century, places that now use the 50 Hz frequency tend to use 220–240 V, and those that now use 60 Hz tend to use 100–127 V. Both frequencies coexist today (Japan uses both) with no great technical reason to prefer one over the other and no apparent desire for complete worldwide standardization.Unless specified by the manufacturer to operate on both 50 and 60 Hz, appliances may not operate efficiently or even safely if used on anything other than the intended frequency.