square wave

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square wave

Cardiology An abnormal BP response to the Valsalva maneuver–VM, seen in left ventricular failure; BP ↑ at the onset of the VM, remains elevated until VM is released, after which the BP abruptly drops to baseline without 'overshooting' the baseline pressure, accompanied by little change in the pulse pressure or tachycardia.
References in periodicals archive ?
When [tau] is equal to 1/2 [f.sub.s], the phase of the square wave component in the BOC sequence 1 is inverted.
The signal passes through charge amplifier, sample and hold circuit, buffer, differential amplifier and comparator, providing the square wave output
Caption: Figure 4: Control input in square wave reference tracking.
From the results of the all five types of UPS it is clear that the harmonics order of modified sine wave and square wave UPS is the same but the %THD of square wave type is 34.176% and modified sine wave is 46.59%.
The square wave input is applied to word line, and the transient analysis in Figure 8 is performed to yield the output shown in Figure 15.
Equation (1) indicates that 5th and 7th harmonics are the most dominant ones for a square wave inverter.
In order to develop a rapid and sensitive voltammetric method for determining the 2-thiouracil, we adopted the square wave voltammetric (SWV) mode, because the peaks were sharper and better defined at lower concentration of 2-thiouracil than those obtained by cyclic voltammetry, with low background current, resulting in improved resolution.
A very important waveform in the time domain and the frequency domain, to which most other waveforms are compared, is an ideal square wave. In the time domain, an ideal square wave has a zero psec rise time and a 50% duty cycle.
Again, the assumption is that the DC power wave will result in no excitation for the lamp However, a perfect square wave is hard to achieve and the efficiency at high frequency is low (Croce 1985; Rogers 1999).
The pulse waveforms that have been used to date include square wave, exponential decaying, oscillatory, bipolar, and instant-charge-reversal (fig.
The system features sampling rates up to 1 kHz and precise control of ramp and hold, sawtooth, sine and square wave profiles, as well as multi-input profiles that can be easily programmed.

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