Method and apparatus for developing a close frequency tolerance output signal from an input signal of lesser frequency tolerance
AssigneeZenith Electronics Corporation
InventorsRaymond C. Hauge, Dennis M. Mutzabaugh
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Abstract
An input signal of frequency tolerance A is combined with a reference first signal having a frequency tolerance B to develop a second signal having a combined frequency tolerance of -A and B . The input signal is combined with the second signal to offset and cancel the A and -A frequency tolerances to produce an output signal having a B frequency tolerance.
Claims6
A method of developing an output signal having a frequency tolerance B from an input signal having a frequency tolerance A, comprising:
- generating a first signal having a frequency tolerance B;
- developing a second signal having a combined frequency tolerance of -A and B, by combining the input signal and the first signal;
- and
- developing the output signal by cancelling the frequency tolerance A from the input signal with the frequency tolerance -A of the second signal.
A method of developing a 46.69 MHz +1/-1 Hz output signal from a 19.39 MHz +20/-20 Hz input signal comprising:
- producing a 6.33 MHz +7/-7 Hz signal from the input signal;
- generating a reference signal of 46.69 MHz +1/-1 Hz;
- developing a 40.36 MHz 8/+8 Hz signal from the 6.33 MHz +7/-7 Hz signal and the 46.69 MHz +1/-1 Hz reference signal;
- and
- developing the output signal by combining the 6.33 MHz +7/-7 Hz signal and the 40.36 MHz -8/+8 Hz signal.
An apparatus for developing an output signal having a frequency tolerance B from an input signal having a frequency tolerance A, comprising:
- means for generating a first signal having said frequency tolerance B;
- means for combining said input signal and said first signal for developing a second signal having a combined frequency tolerance of -A and B;
- and
- means for combining said input signal and said second signal to offset said A frequency tolerance of said input signal with said -A frequency tolerance of said second signal to develop said output signal having said B frequency tolerance.
Dependencies are inferred from the claim text.