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Triac Frequency Multiplier

IP.com Disclosure Number: IPCOM000080051D
Original Publication Date: 1973-Oct-01
Included in the Prior Art Database: 2005-Feb-26
Document File: 2 page(s) / 41K

Publishing Venue

IBM

Related People

Helman, EC: AUTHOR

Abstract

The described circuit converts low-frequency sinusoidal or other waveforms to a higher frequency. Such higher frequency permits energy to be coupled through a smaller magnetic transformer or other electrical component.

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Triac Frequency Multiplier

The described circuit converts low-frequency sinusoidal or other waveforms to a higher frequency. Such higher frequency permits energy to be coupled through a smaller magnetic transformer or other electrical component.

In the circuit, triac control is a free-running oscillator synchronized to MT2 (VT) of the illustrated triac. The triac causes no inductive voltage spikes, since it goes to the off state whenever the current waveform passes through a zero crossing. The magnitude of the current in the triac is determined by the voltage difference between the capacitor C voltage and the sinusoidal input voltage V(I). With these conditions being maintained, electrical current magnitude is controllable by adjusting, not shown, the capacitor voltage during the off state of the triac element. Whenever such current magnitude is constant, then the output voltage V(0) maximum pulse magnitude is also constant. Then, by rectifying the output voltage and filtering same, plus supplying it to a control network for adjusting the capacitor voltage, a simple relatively constant-voltage source or regulated power supply is provided.

Other applications of the frequency multipler can also be easily envisioned.

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