Low frequency AC waveform generator

Patent · Wed Jan 01 00:00:00 EST 1986

OSTI ID:865919

Bilharz, Oscar W ^[1]

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1. Scotia, NY

Low frequency sine, cosine, triangle and square waves are synthesized in circuitry which allows variation in the waveform amplitude and frequency while exhibiting good stability and without requiring significant stabilization time. A triangle waveform is formed by a ramped integration process controlled by a saturation amplifier circuit which produces the necessary hysteresis for the triangle waveform. The output of the saturation circuit is tapped to produce the square waveform. The sine waveform is synthesized by taking the absolute value of the triangular waveform, raising this absolute value to a predetermined power, multiplying the raised absolute value of the triangle wave with the triangle wave itself and properly scaling the resultant waveform and subtracting it from the triangular waveform itself. The cosine is synthesized by squaring the triangular waveform, raising the triangular waveform to a predetermined power and adding the squared waveform raised to the predetermined power with a DC reference and subtracting the squared waveform therefrom, with all waveforms properly scaled. The resultant waveform is then multiplied with a square wave in order to correct the polarity and produce the resultant cosine waveform.

• Research Organization: Knolls Atomic Power Laboratory (KAPL), Niskayuna, NY (United States)
• DOE Contract Number: EY-76-C-12-0052
• Assignee: United States of America as represented by United States (Washington, DC)
• Patent Number(s): US 4599703
• OSTI ID: 865919
• Country of Publication: United States
• Language: English

Related Subjects

frequency
waveform
generator
sine
cosine
triangle
square
waves
synthesized
circuitry
allows
variation
amplitude
exhibiting
stability
requiring
significant
stabilization
time
formed
ramped
integration
process
controlled
saturation
amplifier
circuit
produces
hysteresis
output
tapped
produce
taking
absolute
value
triangular
raising
predetermined
power
multiplying
raised
wave
properly
scaling
resultant
subtracting
squaring
adding
squared
dc
reference
therefrom
waveforms
scaled
multiplied
correct
polarity
triangular waveform
process control
waveform generator
sine wave
amplifier circuit
absolute value
square wave
triangular wave
cosine wave
square waves
/708/327/