Synthesizing a sine wave
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United States of America Patent
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Jun 3, 2003
Grant Date -
N/A
app pub date -
Feb 15, 2001
filing date -
Jun 24, 1998
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A method and apparatus for synthesizing an approximation to a sine wave comprising generating a number of pulse width modulated signals, each having a predetermine duty cycle and being the same frequency as each other, from a clock signal. The generated pulse width modulated signals are then combined to produce an approximation to a sine wave having the same frequency as the pulse width modulated signals. The clock signal is provided by an oscillator arranged to produce clock signals over a continuous range of frequencies so that approximations to a sine wave can be produced over a continuous range of frequencies.
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