Communications: directive radio wave systems and devices (e.g. – With particular circuit – For pulse modulation
Reexamination Certificate
2007-03-27
2007-03-27
Sotomayor, John B. (Department: 3662)
Communications: directive radio wave systems and devices (e.g.,
With particular circuit
For pulse modulation
C342S203000, C342S204000, C342S195000, C342S135000, C342S132000
Reexamination Certificate
active
10506991
ABSTRACT:
A conventional waveform generation circuit was required to increase a number of bits or a sampling rate for a D/A converter to enhance a precision of waveform shaping, and had a problem that a cost was increased. Therefore, as a method for enhancing the precision of waveform shaping, a quantization error of an output waveform is made smaller by controlling an output time interval of an output value from a D/A converter so as to make a difference in an output voltage between target waveform and output waveform smaller. As a result, even if the D/A converter has a small number of bits, the waveform can be generated at high precision. Also, this waveform generation method may be applied to modulation control of a radar apparatus, as a result, constituting a small and inexpensive modulation circuit for an oscillator.
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Sotomayor John B.
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