Communications: directive radio wave systems and devices (e.g. – Determining velocity – Combined with determining sense of motion
Reexamination Certificate
2006-05-23
2006-05-23
Gregory, Bernarr E. (Department: 3662)
Communications: directive radio wave systems and devices (e.g.,
Determining velocity
Combined with determining sense of motion
C342S104000, C342S115000, C342S147000, C342S175000, C342S192000, C342S194000, C342S195000, C342S196000, C342S200000
Reexamination Certificate
active
07049999
ABSTRACT:
A modulation circuit for a traffic surveillance Doppler radar system is disclosed. In one embodiment, the modulation circuit is utilized in a vehicular traffic surveillance Doppler radar system that processes a reflected double-modulated FM signal to determine a target range based upon a phase angle signal differential associated with the target. The modulation circuit may include a digital-to-analog (D/A) converter/voltage regulator/oscillator arrangement or a D/A converter/varactor device/oscillator arrangement. The modulation circuit generates a double-modulated FM signal based upon a frequency versus voltage characteristic associated with the oscillator.
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Applied Concepts Inc.
Gregory Bernarr E.
Griggs Scott T.
Griggs Bergen LLP
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