pape
... The multiple clock phases for the converters are generated from 2 PLLs locked to an external divided-by-4 reference clock running at 250MHz. Each PLL is based on a ring of 4 differential stages, with the 8 internal clock phases from the ring sent to digitally-controlled phase interpolators (phase re ...
... The multiple clock phases for the converters are generated from 2 PLLs locked to an external divided-by-4 reference clock running at 250MHz. Each PLL is based on a ring of 4 differential stages, with the 8 internal clock phases from the ring sent to digitally-controlled phase interpolators (phase re ...
Implementation in RPI - University of Mass Lowell, Space Science
... We have shown in a feasibility paper (Calvert et al., 1995) that the expected angular resolution of an instrument like the RPI is about 1, depending on the SNR. It must be realized that the angle-of-arrival can only be measured with the above-described procedure if a single echo of frequency f arri ...
... We have shown in a feasibility paper (Calvert et al., 1995) that the expected angular resolution of an instrument like the RPI is about 1, depending on the SNR. It must be realized that the angle-of-arrival can only be measured with the above-described procedure if a single echo of frequency f arri ...
Ch 10
... The two bias currents are not exactly the same The differential-pair transistors at the input are not perfectly matched, causing an input ...
... The two bias currents are not exactly the same The differential-pair transistors at the input are not perfectly matched, causing an input ...
Current Mode Compensation Article
... architecture with many power management IC manufacturers and power supply vendors. Also known as multi-loop control, an external voltage loop and a widebandwidth inner current loop are standard. Peak, valley, average, hysteretic, constant on-/off-time, and emulated (sample-and-hold) current-mode tec ...
... architecture with many power management IC manufacturers and power supply vendors. Also known as multi-loop control, an external voltage loop and a widebandwidth inner current loop are standard. Peak, valley, average, hysteretic, constant on-/off-time, and emulated (sample-and-hold) current-mode tec ...
Fairchild PowerPoint Presentation Template
... – CCM operation at high frequency for size reduction • High Line @ 85kHz for efficiency & EMI • Low Line @ 140kHz for transformer size reduction – 85k/140kHz fixed frequency for easier dealing CMN interference to touch panel – CCM operation to boost efficiency – SD for OTP to save external OTP circu ...
... – CCM operation at high frequency for size reduction • High Line @ 85kHz for efficiency & EMI • Low Line @ 140kHz for transformer size reduction – 85k/140kHz fixed frequency for easier dealing CMN interference to touch panel – CCM operation to boost efficiency – SD for OTP to save external OTP circu ...
New Model Eleven Level Inverter Using SPWM Technique
... Pulse width modulation is a modulation technique used to encode a message into a pulsing signal and its main is to allow the control of the power supplied to electrical devices [6] [7]. Pulse width modulation uses a rectangular pulse wave whose pulse width modulation is modulated resulting in the va ...
... Pulse width modulation is a modulation technique used to encode a message into a pulsing signal and its main is to allow the control of the power supplied to electrical devices [6] [7]. Pulse width modulation uses a rectangular pulse wave whose pulse width modulation is modulated resulting in the va ...
Dimming Presentation
... dimming circuit itself. But when operated at anything less than full output, the SCR dimmer presents a distinctly non-linear load, creating what is known as “triplen harmonics.” This means that the phase currents in a three-phase system do not cancel out as intended, but, rather, add up. In the wors ...
... dimming circuit itself. But when operated at anything less than full output, the SCR dimmer presents a distinctly non-linear load, creating what is known as “triplen harmonics.” This means that the phase currents in a three-phase system do not cancel out as intended, but, rather, add up. In the wors ...
g Accelerometers ADXL78 i
... if the resonant frequency of the sensor is low, the displacement per unit acceleration is high. The sensor may reach the mechanical limit of travel if the applied acceleration is high enough. This can be remedied by locating the accelerometer where it does not see high values of acceleration, and by ...
... if the resonant frequency of the sensor is low, the displacement per unit acceleration is high. The sensor may reach the mechanical limit of travel if the applied acceleration is high enough. This can be remedied by locating the accelerometer where it does not see high values of acceleration, and by ...
Chirp spectrum
The spectrum of a chirp pulse describes its characteristics in terms of its frequency components. This frequency-domain representation is an alternative to the more familiar time-domain waveform, and the two versions are mathematically related by the Fourier transform. The spectrum is of particular interest when pulses are subject to signal processing. For example, when a chirp pulse is compressed by its matched filter, the resulting waveform contains not only a main narrow pulse but, also, a variety of unwanted artifacts many of which are directly attributable to features in the chirp's spectral characteristics. The simplest way to derive the spectrum of a chirp, now computers are widely available, is to sample the time-domain waveform at a frequency well above the Nyquist limit and call up an FFT algorithm to obtain the desired result. As this approach was not an option for the early designers, they resorted to analytic analysis, where possible, or to graphical or approximation methods, otherwise. These early methods still remain helpful, however, as they give additional insight into the behavior and properties of chirps.