Fast frequency hopping synthesizer
First Claim
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1. A fast frequency hopping synthesizer which responds to command signals applied thereto comprising:
- an addressable memory means containing a plurality of error signals addressed by said command signals; and
,a variable frequency oscillator means for generating an output frequency in response to a combination of an instantaneous command signal and an instantaneously addressed error signal.
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Abstract
The output of a fast frequency hopping VCO is mixed with the output of a conventional slow acquisition frequency synthesizer to produce an IF which is applied to a frequency discriminator where the IF is compared with a reference IF to provide an error signal which is digitized and stored in a memory. Subsequently, the error signal is applied together with a command signal to the VCO to obtain the desired frequency output.
33 Citations
10 Claims
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1. A fast frequency hopping synthesizer which responds to command signals applied thereto comprising:
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an addressable memory means containing a plurality of error signals addressed by said command signals; and
,a variable frequency oscillator means for generating an output frequency in response to a combination of an instantaneous command signal and an instantaneously addressed error signal. - View Dependent Claims (2, 3, 4, 5)
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6. A fast frequency hopping synthesizer which responds to a pseudo random series of command words comprising:
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an addressable memory means containing a plurality of individually addressed error signals; a variable frequency oscillator means for generating an output in response to a combination of a first command signal and an associated error signal, said addressable memory means being addressed by said first command signal to recall said associated error signal; a frequency synthesizer employing indirect synthesis techniques and responsive to second command signals for generating a sequence of frequency signals, the range of said second command signals encompassing at least the range of said first command signals; means comparing said first command signals with said second command signals for generating a qualification signal when the comparison is proper; means responsive to said qualification signal for comparing said sequence of frequency signals with said variable frequency oscillator means output to generate a second error signal; and
,means for adjusting said associated error signal in response to said second error signal. - View Dependent Claims (7, 8, 9, 10)
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Specification