Signal synthesizer system
First Claim
Patent Images
1. A signal synthesizer system comprising:
- common frequency reference means for providing a frequency reference;
first signal source means combined with the common frequency reference means for providing a desired first signal output;
second signal source means combined with the common frequency reference means for providing a desired second signal output; and
common controller means coupled to the first and second signal source means for providing a predetermined relationship between the first and second signal outputs.
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Abstract
A signal synthesizer system allowing a wide variety of signal sources for test and evaluation is provided. In one embodiment, the signal synthesizer system is a precision two channel synthesizer having a variety of capabilities which are made possible by having two independently controlled sources with a common controller residing in one instrument.
23 Citations
47 Claims
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1. A signal synthesizer system comprising:
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common frequency reference means for providing a frequency reference; first signal source means combined with the common frequency reference means for providing a desired first signal output; second signal source means combined with the common frequency reference means for providing a desired second signal output; and common controller means coupled to the first and second signal source means for providing a predetermined relationship between the first and second signal outputs. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A signal synthesizer system comprising:
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common frequency reference means for providing a fixed frequency reference; first signal source means combined with the common frequency reference means for providing a first variable frequency of a first signal output; second signal source means combined with the common frequency reference means for providing a second variable frequency of a second signal output; and common controller means coupled to the first and second signal source means for providing the first and second signal outputs with the first and second variable frequencies which are respectively independent. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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18. A signal synthesizer system comprising:
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common frequency reference means for providing a fixed frequency reference; first signal source means combined with the common frequency reference means for providing a first variable frequency of a first signal output; second signal source means combined with the common frequency reference means for providing a second variable frequency of a second signal output; common controller means coupled to the first and second signal source means for providing the first and second signal outputs with the first and second variable frequencies which are respectively independent; mixer means coupled to the common frequency reference means coupled to the common frequency reference means and the first and second signal source means to obtain the desired frequency ranges of the first and second signal outputs; low pass filter means combined with the common frequency reference means and the first and second signal source means to reject high frequency images of the first and second signal outputs; amplifier means combined with the common frequency reference means and the first and second signal source means to amplify the first and second signal outputs; and attenuator means combined with the common frequency reference means and the first and second signal source means to provide the first and second signal outputs with the desired range of gains.
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19. A signal synthesizer system comprising:
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common frequency reference means for providing a frequency reference; first signal source means combined with the common frequency reference means for providing a variable frequency of a first signal output; second signal source means combined with the common frequency reference means and the first signal source means for providing the variable frequency of a second signal output; and common controller means coupled to the first and second signal source means for providing the first and second signal outputs with a variable phase offset of the second signal output with respect to the first signal output. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26)
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27. A signal synthesizer system comprising:
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common frequency reference means for providing a fixed frequency reference; first signal source means combined with the common frequency reference means for providing a first variable frequency of a first signal output; second signal source means combined with the common frequency reference means for providing a second variable frequency of a second signal output; common controller means coupled to the first and second signal source means for providing the first and second signal outputs with the first and second variable frequencies which are respectively independent; mixer means coupled to the common frequency reference means coupled to the common frequency reference means and the first and second signal source means to obtain the desired frequency ranges of the first and second signal outputs; low pass filter means combined with the common frequency reference means and the first and second signal sources means to reject high frequency images of the first and second signal outputs; amplifier means combined with the common frequency reference means and the first and second signal source means to amplify the first and second signal outputs; and attenuator means combined with the common frequency reference means and the first and second signal source means to provide the first and second signal outputs with the desired range of gains.
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28. A signal synthesizer system comprising:
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common frequency reference means for providing a fixed frequency reference; first signal source means combined with the common frequency reference means for providing a first variable frequency of a first signal output; second signal source means combined with the common frequency reference means for providing a second variable frequency of a second signal output; and common controller means coupled to the first and second signal source means or providing the first and second signal outputs with the first and second variable frequencies by a constant frequency offset. - View Dependent Claims (29, 30, 31, 32, 33, 34, 35, 36)
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37. A signal synthesizer system comprising:
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common frequency reference means for providing a fixed frequency reference; first signal source means combined with the common frequency reference means for providing a first variable frequency of a first signal output; second signal source means combined with the common frequency reference means for providing a second variable frequency of a second signal output; common controller means coupled to the first and second signal source means for providing the first and second signal outputs with the first and second variable frequencies by a constant frequency offset; mixer means coupled to the common frequency reference means coupled to the common frequency reference means and the first and second signal source means to obtain the desired frequency ranges of the first and second signal outputs; low pass filter means combined with the common frequency reference means and the first and second signal source means to reject high frequency images of the first and second signal outputs; amplifier means combined with the common frequency reference means and the first and second signal source means to amplify the first and second signal outputs; attenuator means combined with the common frequency reference means and the first and second signal source means to provide the first and second signal outputs with the desired range of gains; and combiner means for combining the first and second output signals to provide single output.
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38. A signal synthesizer system comprising:
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common frequency reference means for providing a frequency reference; first signal source means combined with the common frequency reference means for providing a variable frequency of a first signal output; second signal source means combined with the common frequency reference means and the first signal source means for providing the variable frequency of a second signal output; and common controller means coupled to the first and second signal source means for providing the first and second signal outputs with variable duty cycle square waves and being complementary to each other. - View Dependent Claims (39, 40, 41, 42, 43, 44, 45, 46)
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47. A signal synthesizer system comprising:
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common frequency reference means for providing a fixed frequency reference; first signal source means combined with the common frequency reference means for providing a first variable frequency of a first signal output; second signal source means combined with the common frequency reference means and the first signal source means for providing the variable frequency of a second signal output; common controller means coupled to the first and second signal source means for providing the first and second signal outputs with variable duty cycle square waves and being complementary to each other; mixer means coupled to the common frequency reference means coupled to the common frequency reference means and the first and second signal source means to obtain the desired frequency ranges of the first and second signal outputs; low pass filter means combined with the common frequency reference means and the first and second signal source means to amplify the first and second signal outputs; square pulse circuit means coupled to the common frequency reference means and the first and second signal source means to square up and combine the first and second signal outputs in such a fashion as to yield a pulse waveform; amplifier means combined with the common frequency reference means and the first and second signal source means to amplify the first and second signal outputs; and attenuator means combined with the common frequency reference means and the first and second signal source means to provide the first and second signal outputs with the desired range of gains.
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Specification