Oscillators – Automatic frequency stabilization using a phase or frequency... – With reference oscillator or source
Reexamination Certificate
2005-04-05
2005-04-05
Mis, David (Department: 2817)
Oscillators
Automatic frequency stabilization using a phase or frequency...
With reference oscillator or source
C331S074000
Reexamination Certificate
active
06876262
ABSTRACT:
A technique for generating carrier frequencies with fast hopping capability associated with multiband systems for ultra wideband applications. The technique employs a single VCO20that is locked in a PLL30. The output of this VCO20is divided in the frequency domain. The divided frequencies thus obtained are combined in a single-sideband manner to obtain various other frequencies. The single-sideband combination requires open loop operations such as multiplication and addition or subtraction to implement, and hence is very fast. The VCO center frequency is not disturbed in the process. Since the required frequencies are generated in an open-loop fashion, instead of inside a PLL, the speed is increased by orders of magnitude.
REFERENCES:
patent: 3612977 (1971-10-01), Perrett
Balakrishnan Jaiganesh
Batra Anuj
Dabak Anand G.
Gharpurey Ranjit
Brady III Wade James
Mis David
Neerings Ronald O.
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