TWO_PHASE_VOLTAGE_CONTROLLED

Published:2009/7/6 3:09:00 Author:May | From:SeekIC

Produces fixed-amplitude sawtooth outputs that can be shaped to give sine waves, with outputs of the two identical channels differing by a specified phase such as 90o. Each output is integrated to give rising or falling ramp that controls switching FET of opposite channel. With oscillation established, one integrator output goes toward zero and the other away from zero, with same or opposite polarity. When first output crosses zero, discriminator switches FET in input amplifier of other channel, witch action being self-perpetuating to give desired sawtooth outputs. Dashed-line gating at outputs of discriminators can be used to boost slope of one sawtooth in one quadrant.-F. B. Jones, Voltage-Controlled Two-Phase Sawtooth Oscillator, Wireless World, June 1973, p 285.



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