Boots – shoes – and leggings
Patent
1984-09-28
1989-05-30
Blum, Theodore M.
Boots, shoes, and leggings
G06F 102
Patent
active
048357219
ABSTRACT:
A frequency synthesizer for use by an operator or other means for continuously generating an output noise signal, the frequency synthesizer comprises a digital means for directly synthesizing random noise having controlled spectral amplitudes. The synthesized random noise is characterized by a series of digital composite frequency synthesizer output noise signal sample values. The digital means comprises a means for providing and for periodically changing a series of sets of shifted segment frequency values, each set of shifted segment frequency values having a controlled series of random frequency values. Each frequency value is a random digital number selected to be within a range corresponding to a segment frequency band and characterizes a shifted segment frequency value. A plurality of digital oscillators is included, each oscillator having a corresponding segment frequency band. Each oscillator output is a series of digital values that sequentially characterizes a sinusoid having a frequency that equals the shifted segment frequency of the respective frequency band. A means for sequentially sampling the output amplitude of each oscillator and for combining each sampled oscillator output value with a corresponding predetermined frequency segment gain value to obtain a corresponding set of segment gain scaled sample values. A means for summing each segment gains scaled sample value within the set to obtain a composite frequency synthesizer output noise signal sample value is included along with a means with for forming a continuous output signal from a series of the composite frequency synthesizer output noise signal sample values.
REFERENCES:
patent: 3609327 (1971-09-01), Perlman
patent: 4375620 (1983-03-01), Singer et al.
patent: 4516217 (1985-05-01), Starner
patent: 4571556 (1986-02-01), Gnerlich et al.
Becker Thomas A.
Cuenin Paul J.
Mintzer Lester
Blum Theodore M.
Hamann H. Fredrick
Kirk James F.
Montanye George A.
Rockwell International Corporation
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