sine wave

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sine wave

Sinusoidal waveform A waveform of periodic oscillations–eg, in alternating current in which the amplitude of each point in the wave is proportional to the sine of the time from a start point Cardiology An EKG finding described in severe hyperkalemia where the 'P' wave disappears and the QRS complex and 'T' wave merge in an oscillating pattern

sine wave

(sīn wāv)
A symmetric wave representing one complete cycle of a single-frequency oscillation; the displacement of mass over time described by using a function from trigonometry, the sine.
See also: pure tone

sine wave

continuous, oscillating stream of energy, generated by an electrosurgery unit; used during surgery to section/separate soft tissues (see Table 1)
Table 1: Forms of electrosurgery
Electrosurgery typeFeatures
ElectrofulgurationUses a high-voltage, dampened waveform to produce a spark that arcs from the probe tip to the skin lesion, causing superficial charring of the lesion surface
ElectrosectionUses an undampened or mildly damped current in conjunction with a very fine emitting electron to produce a cutting effect through soft tissue
ElectrocoagulationUses an intermittent damped current in conjunction with a larger emitting electrode to produce less intense heat over a larger area to induce coagulation and thereby haemostasis
ElectrodesiccationUses an intermittent damped waveform with high voltage and a lower current emitted from a ball electrode to induce cell dehydration and tissue shrinkage
References in periodicals archive ?
We leveraged our market leading SineWave Guardian(R) technology, to work with this emerging innovation, so our customer's motors are protected, and they can realise the full benefits of high frequency motors.
This waveform resembles the velocity source wave of Type 1 or the derivative of a full-cycle sinewave displacement.
The TA60-100 met Concord's critical needs: pure sinewave power and the ability to operate for long durations.
To measure and correct for the phase and amplitude errors caused by the transducer conditioners, a reference sinewave is input to each of the transducer conditioners.
Since nonlinear signal processing often is used for voice enhancement, he added, traditional audio tests using sinewaves and tone bursts may not provide an accurate picture of audio performance.
These features are in addition to those that APC has always provided with its award winning line including sinewave output, automated voltage regulation, serial/USB communications and network manageability.
reverse) { tr1 = tr0 + xx1; tr2 = tr0 + xx2; } else { tr2 = tr0 + xx1; tr1 = tr0 + xx2; } SFRPAGE = PCA0_PAGE; f0 = s4(tr0); s = f0*0x7F; p = amplitude * (signed int)s; //multiply by v o = p>>8; // throw away low byte o += 0x80; // center sinewave at 50% PCA0CPH0 = o; f1 = s4(tr1); s = f1*0x7F; p = amplitude * (signed int)s; //multiply by v o = p>>8; // throw away low byte o += 0x80; // center sinewave at 50% PCA0CPH1 = o; f2 = s4(tr2); s = f2*0x7F; p = amplitude * (signed int)s; //multiply by v o = p>>8; // throw away low byte o += 0x80; // center sinewave at 50% PCA0CPH2 = o; SFRPAGE = SFRPAGE_SAVE; } // float s4(float tr) { float dpwm4; if(tr<=1.
Moreover, the AC output created during battery operation is quasi- or modified (not true) sinewave AC power and can disrupt the operation of and even damage sensitive laboratory and hospital equipment.
The filters continuously track the input AC power line at all locations on the sinewave and instantaneously counter noise.
This involved two rubidium vapor clocks placed approximately 500m apart with a 5MHz sinewave RF signal propagating between the clocks via a buried nitrogen filled coaxial cable maintained at a constant pressure of ~ 2 psi.
The CVSS-940 is a true sinewave voltage-controlled crystal oscillator (VCX0) providing 150 dBc/Hz noise floor and [+ or -] 50 ppm minimum APR pullability.