Back to results
US 4,286,228 AGranted
Frequency spectrum noise generator
AssigneeWestinghouse Electric Corp.
InventorsCarl D. Wise, Vincent M. Heazel, Jr.
Life of this patent
Estimating the term…
Abstract
Apparatus for generating noise is described incorporating means for generating a noise frequency spectrum, a plurality of voltage controlled oscillators and means for coupling the voltage controlled oscillators to an output. The invention overcomes the problem of a single voltage controlled oscillator which could not slue and settle at an appropriate frequency prior to being coupled to an output which resulted in undesired frequencies being generated during this slueing and settling time.
Claims5
Apparatus for generating noise comprising:
- means for generating a noise frequency spectrum represented by a sequence of discrete voltages occurring at predetermined time intervals,
- a plurality of voltage controlled oscillators, each having an output,
- first means for coupling a first discrete voltage from said sequence of discrete voltages to a first voltage controlled oscillator to provide a first frequency at said output in response to said first discrete voltage during a first time interval,
- second means for coupling a second discrete voltage from said sequence of discrete voltages to a second voltage controlled oscillator to provide a second frequency at said output in response to said second discrete voltage during a second time interval,
- an outut terminal, and third means for coupling said outputs of said first and second voltage controlled oscillators to said outut terminal.
2 more elements
Dependencies are inferred from the claim text.