
Linear Regulator Fundamentals
... • A linear regulator operates by using a voltage-controlled current source to force a fixed voltage to appear at the regulator output terminal. The control circuitry continuously monitors (senses) the output voltage, and adjusts the current source (as required by the load) to hold the output voltage ...
... • A linear regulator operates by using a voltage-controlled current source to force a fixed voltage to appear at the regulator output terminal. The control circuitry continuously monitors (senses) the output voltage, and adjusts the current source (as required by the load) to hold the output voltage ...
VA, VAR and Power Factor – Fact or Fiction
... VA*cos(phase) is common, as is PF = 1/sqrt(1+THD2). Aren’t these the same? Not in the real world! The cos(phase) equation only yields the “correct” result when no distortion or other frequencies are present. The THD related equation only yields the “correct” result when there is no phase shift prese ...
... VA*cos(phase) is common, as is PF = 1/sqrt(1+THD2). Aren’t these the same? Not in the real world! The cos(phase) equation only yields the “correct” result when no distortion or other frequencies are present. The THD related equation only yields the “correct” result when there is no phase shift prese ...
Aalborg Universitet
... When λ=1.5, the delay is 1.5Ts and frd is fs/ 6. Fig. 5 shows the Bode plots of the open-loop gain T. The system is stable at the PCC point because the phase crosses -180º before fr due to the delay effect. Ref. [7] shows that if the resonance frequency is higher than fs/6, the resonance peak is not ...
... When λ=1.5, the delay is 1.5Ts and frd is fs/ 6. Fig. 5 shows the Bode plots of the open-loop gain T. The system is stable at the PCC point because the phase crosses -180º before fr due to the delay effect. Ref. [7] shows that if the resonance frequency is higher than fs/6, the resonance peak is not ...
[13] Ankit Agarwal and Vineeta Agarwal, “Delta Modulated
... triangular carrier wave at a frequency of 2 kHz is shown in Fig. 16. The switching pulses for an output frequency of 250 Hz and 10 Hz at a carrier frequency of 2 kHz are shown in Fig. 17 and Fig. 18, respectively. Fig. 19 shows the output voltage for an output frequency of 250 Hz for the RL load for ...
... triangular carrier wave at a frequency of 2 kHz is shown in Fig. 16. The switching pulses for an output frequency of 250 Hz and 10 Hz at a carrier frequency of 2 kHz are shown in Fig. 17 and Fig. 18, respectively. Fig. 19 shows the output voltage for an output frequency of 250 Hz for the RL load for ...
Phase Detector
... • The portion of the beat note that modulates the VCO closer to the input signal appears more rounded, and the portion that modulates the VCO away from the input signal appears more peaked. • Because of the asymmetry, the beat note contains a finite DC voltage which steadily pushes the VCO frequenc ...
... • The portion of the beat note that modulates the VCO closer to the input signal appears more rounded, and the portion that modulates the VCO away from the input signal appears more peaked. • Because of the asymmetry, the beat note contains a finite DC voltage which steadily pushes the VCO frequenc ...
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.