Some Quadrature Waveform Generators

The oscillators with different type of output signal e.g. sinusoidal, triangular, square etc. are often produced as function generators. Moreover quadrature oscillators are used in measurements and communication applications, e.g. mixers and single sideband modulators. In measurement applications this types of oscillators are used in selective voltmeters and vector generators. In this paper some problems with amplitude of generated waveforms of quadrature oscillators are described and also simulation results and techniques of oscillator’s construction are presented.