Low-cost high-performance complete-on-a-single-chip IC multipliers, such as the AD530, make it feasible to build oscillators having two-phase sine wave output (i.e., sinωt and cosωt), with frequency controllable by a voltage. The frequency may be varied over a wide range, depending on the dynamic range of the multiplier, for frequency-sweep applications, or it may be centered about a fixed frequency for highly-linear frequency modulation. Read full article
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