Phase continuous synthesizer with phase coasting and associated methods
First Claim
1. An apparatus for generating a relatively wideband swept frequency signal comprising:
- a first generator for generating a first swept frequency signal;
a second generator successively switching between different frequency signals while creating undesired phase discontinuities during switching;
a mixer connected to said first and second generators for mixing the first swept frequency signal and the successively switched different frequency signals to produce the relatively wideband swept frequency signal; and
a phase coasting unit connected downstream of the mixer to reduce the undesired phase discontinuities created during switching in the relatively wideband swept frequency signal.
2 Assignments
0 Petitions
Accused Products
Abstract
The phase continuous synthesizer and method generate a relatively wideband swept frequency signal with the use of a first generator for generating a first swept frequency signal, and a second generator successively switching between different frequency signals while creating undesired phase discontinuities during switching. A mixer is connected to the first and second generators for mixing the first swept frequency signal and the successively switched different frequency signals to produce the relatively wideband swept frequency signal, and a phase coasting unit is connected downstream of the mixer to reduce the undesired phase discontinuities created during switching in the relatively wideband swept frequency signal.
-
Citations
17 Claims
-
1. An apparatus for generating a relatively wideband swept frequency signal comprising:
-
a first generator for generating a first swept frequency signal;
a second generator successively switching between different frequency signals while creating undesired phase discontinuities during switching;
a mixer connected to said first and second generators for mixing the first swept frequency signal and the successively switched different frequency signals to produce the relatively wideband swept frequency signal; and
a phase coasting unit connected downstream of the mixer to reduce the undesired phase discontinuities created during switching in the relatively wideband swept frequency signal. - View Dependent Claims (2, 3, 4, 5)
-
-
6. An apparatus for generating a relatively wideband swept frequency signal comprising:
-
a first digital synthesizer for generating a first swept frequency signal;
a second generator successively switching between different frequency signals while creating undesired phase discontinuities during switching;
a mixer connected to said first and second digital synthesizers for mixing the first swept frequency signal and the successively switched different frequency signals to produce the relatively wideband swept frequency signal; and
a third-order phase locked loop (PLL) defining a phase coasting unit and connected downstream of the mixer to reduce the undesired phase discontinuities created during switching in the relatively wideband swept frequency signal. - View Dependent Claims (7, 8)
-
-
9. A method for generating a relatively wideband swept frequency signal comprising:
-
generating a first swept frequency signal with a first generator;
successively switching between different frequency signals with a second generator while creating undesired phase discontinuities during switching;
combining the first swept frequency signal and the successively switched different frequency signals to produce the relatively wideband swept frequency signal; and
reducing the undesired phase discontinuities in the relatively wideband swept frequency signal created during switching by coasting over the undesired phase discontinuities in the relatively wideband swept frequency signal. - View Dependent Claims (10, 11, 12, 13)
-
-
14. A method for generating a relatively wideband swept frequency signal comprising:
-
generating a first swept frequency signal with a first digital synthesizer;
successively switching between different frequency signals with a second generator while creating undesired phase discontinuities during switching, the second generator comprising a second digital synthesizer generating an offset frequency signal and a plurality of frequency converters receiving an output of a reference frequency signal generator and combining the offset frequency signal with the reference frequency signal to produce the respective different frequency signals;
combining the first swept frequency signal and the successively switched different frequency signals to produce the relatively wideband swept frequency signal; and
reducing the undesired phase discontinuities in the relatively wideband swept frequency signal created during switching by providing a phase coasting unit to coast over the undesired phase discontinuities in the relatively wideband swept frequency signal. - View Dependent Claims (15, 16, 17)
-
Specification