Sine wave generator for different frequencies

Details Sine wave generator for different frequencies Sine wave generator for different frequencies

1980-11-12

1983-01-11

Heyman, John S.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

340347M, 364721, H03B 1900, H03K 380, H03K 1302

Patent

active

043684327

ABSTRACT:
A frequency oscillator for generating a square wave output pulse train is connected via a frequency divider circuit to a binary shift register which is designed as a divide-by-n counter with m counter stages, wherein m=n/2. Each stage is associated with an output. A resistor network is composed of m rated resistors each of which resistors is connected to a respective register output and in common to an input of a low-pass filter network forming the output circuit. The rating of the resistors is such that an k-th resistor associated with the k-th output of the shift register has the value ##EQU1## wherein R is a reference resistance value;

REFERENCES:
patent: 3569684 (1971-03-01), Burnett
patent: 3657657 (1972-04-01), Jefferson
patent: 3728719 (1972-03-01), Fish
patent: 3849774 (1974-11-01), Barth
patent: 3974498 (1974-12-01), Kneir
patent: 3992680 (1976-11-01), Herzl
patent: 4056692 (1977-11-01), Place
patent: 4295098 (1981-10-01), Crowley
"Advanced Electronic Circuits", Tietze & Schenk, 1978-Springer Verlag, pp. 411-412; 424-426.

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