Method for digital voltage controlled oscillator

Details Method for digital voltage controlled oscillator Method for digital voltage controlled oscillator

1984-06-15

1987-06-09

Malzahn, David H.

Boots, shoes, and leggings

328 14, G06F 1531

Patent

active

046725687

ABSTRACT:
A method for approximating a continuous range of signals having sinusoidal waveforms with signals having trapezoidal waveforms, and for generating a continuous range of frequencies around a given center frequency. The method forms trapezoidal waveforms by a computational technique. A periodic triangular waveform is first formed by repetitiously adding and subtracting an amplitude increment at a succession of time intervals. The time intervals can be large, thereby allowing a low sampling frequency. The peaks of the triangular waveform are truncated to form the trapezoidal waveform. The method can be easily implemented within a standard arithmetic logic unit (ALU) structure.

REFERENCES:
patent: 4068178 (1978-01-01), Tunzi
patent: 4130876 (1978-12-01), Mitsuhashi
patent: 4159527 (1979-06-01), Yahata et al.
patent: 4328554 (1982-05-01), Mantione
patent: 4563548 (1986-01-01), Misherghi et al.

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