Method and apparatus for generating a pulse train with variable

Details Method and apparatus for generating a pulse train with variable Method and apparatus for generating a pulse train with variable

1980-12-18

1984-02-14

Smith, Jerry

Boots, shoes, and leggings

377 47, H03K 504

Patent

active

044320655

ABSTRACT:
For generating a pulse train having a variable frequency, in a first step a referance frequency is divided by the combined factor D.sub.r =N.multidot.p, wherein N and p are integers. Thus, an auxiliary pulse train is obtained. In a next step, there are included (N-1) intermediate pulses having at least approximately the same distance from each other between adjacent pulses of the auxiliary pulse train. Thereby, in total a division of the reference frequency by the factor p is obtained. This method results in an improvement of the frequency resolution by the factor N.sup.2 with respect to a method where the reference frequency is directly divided by the factor p. A circuit arrangement for carrying out this method contains a frequency divider, which issues small output pulses having the period D.sub.r T.sub.o, and (N-1) triggerable pulse emitters or generators, each of which delivering one of the aforementioned intermediate pulses.

REFERENCES:
patent: 3586782 (1971-06-01), Thomas
patent: 3603739 (1971-09-01), Edson
patent: 3632881 (1972-01-01), Graham
patent: 3835396 (1974-09-01), Demos et al.
patent: 3976945 (1976-08-01), Cox
patent: 4017719 (1977-04-01), Kaplan et al.
patent: 4241408 (1980-12-01), Gross
patent: 4257108 (1981-03-01), Igel
"Elektronische Bausteinsysteme SIMATIK" by Rolf Hahn, vol. 1, 1974, pp. 244-245.

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