This paper reviews different techniques used in the literature to analyze distortion in analog integrated circuits. It concentrates on analytical techniques rather than on numerical techniques. Techniques such as Volterra series, harmonic injection method, and modeling of circuit non-linearities, are discussed with emphasis on the last two techniques. The theory behind each technique is explain...

The mode-locking technique based on intracavity second-harmonic generation is extended to sum- and difference-frequency generation. Simultaneous passive mode locking of two different types of laser in a combined cavity is thus possible. By using the same principle, a laser may be actively mode locked by injection of a pulse train from another mode-locked laser.

This paper presents a Wireless-USB/WiMedia-compliant fast-hopping frequency synthesizer architecture with quadrature outputs based on sub-harmonic injection-locking. The synthesizer features a cross-coupled quadrature digitally-controlled oscillator, that is injection-locked to a sub-harmonic frequency. An intuitive closed-form expression for the dynamics of the quadrature injection-locked osci...

The nonlinearity inherent in the Traveling Wave Tube (TWT) amplifier distorts amplified signals and results in reduced efficiency and bandwidth, limiting its use in communication and electronic countermeasure applications. Signal predistortion is an effective technique for suppressing nonlinear distortion in TWTs that provides high suppression and requires simple circuits for implementation. Wh...

Nanosecond optical pulses with high power and spectral brightness in the deep ultraviolet (UV) region have been produced by sum frequency mixing of nearly transform-limited-bandwidth IR light originating from a home-built injection-seeded ring cavity KTiOPO(4) optical parametric oscillator (OPO) and the fourth harmonic beam of an injection-seeded Nd:YAG laser used simultaneously to pump the OPO...

The ratio of torque to copper loss can be increased by injecting third-harmonic current into five-phase permanent-magnetic synchronous motor (PMSM). Accurate flux linkage information is indispensable in the process calculating reference corresponding maximum torque/copper ratio. In harsh working environments, will deviate from initial measured value, resulting deviation between and point. There...

The wavefront of an injection-seeded soft x-ray laser beam generated by amplification of high-harmonic pulses in a λ=18.9 nm molybdenum plasma amplifier was measured by a Hartmann wavefront sensor with an accuracy of λ/32 root mean square (rms). A significant improvement in wavefront aberrations of 0.51±0.03λ rms to 0.23±0.01λ rms was observed as a function of plasma column length. The variatio...

BACKGROUND AND PURPOSE Initial reports indicate that transcranial harmonic imaging after ultrasound contrast agent bolus injection (BHI) can detect cerebral perfusion deficits in acute ischemic stroke. We evaluated parametric images of the bolus washout kinetics. METHODS Twenty-three patients with acute internal carotid artery infarction were investigated with perfusion harmonic imaging after...

Variable phase-pole machines have the potential to extend operational range higher speeds through magnetic pole changes. The state-of-the-art vectorspace decomposition cannot model transient behavior of change for any possible configuration as it creates a discontinuity. proposed harmonicplane theory solves this issue by generalizing vector-space fullest using its discrete Fourier transformatio...