Frequency-ratio apparatus
OwnerHerbert S. Riddle, Jr.inventor
Life of this patent
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Abstract
An apparatus for producing a signal which varies as the ratio of the frequency of a first stream to a second stream. In a preferred embodiment of the apparatus, the first stream is transformed into a first signal of value proportional to the frequency of the first stream, and the second stream is transformed into a second signal that has a value proportional to the product of the second stream frequency times a feedback value. The feedback value is derived from a combination of the first and second signals.
Claims5
Apparatus for producing a signal which varies as the ratio of the frequency of a first, frequency stream to the frequency of a second, frequency stream, the apparatus comprising:
- (a) a first-stream frequency-discriminating means which transforms said first, frequency stream into a third signal of value proportional to the frequency of said first stream,
- (b) a second-stream frequency-discriminating means which multiplies said second, frequency stream by a feedback value to form a fourth signal of value proportional to the product of said second-stream frequency times said feedback value,
- (c) a combining means which combines the third and fourth signals and generates an output value proportional to the feedback value, and
- (d) a feedback loop which returns said feedback value to the second-stream frequency-discriminating means, whereby the feedback loop in said apparatus causes the output value to vary in a manner which is proportional to the ratio of the first-stream frequency divided by the second-stream frequency.
Apparatus for producing a signal which varies as the ratio of the frequency of a first stream to a second stream, the apparatus comprising:
- (a) a first stream frequency-discriminating means which transforms the first stream into a first signal of value proportional to the frequency of the first stream;
- (b) a second stream frequency-discriminating means which effectively performs both frequency discrimination and multiplication, and which essentially multiplies the incompletely demodulated second stream by a feedback value to form a second signal of value proportional to the product of the second stream frequency times the feedback value;
- (c) a combining means which combines the first and second signals and generates an output value proportional to the feedback value;
- and
- (d) a feedback loop which returns the feedback value to the second stream frequency-discriminating means, so that the feedback loop in the apparatus causes the output value to vary in a manner which is proportional to the ratio of the first stream frequency divided by the second stream frequency.
A method of producing a signal which varies as the ratio of the frequency of a first stream to a second stream, the method comprising:
- (a) accomplishing frequency-discrimination of the first stream, by transforming the first stream into a first signal of value proportional to the frequency of the first stream;
- (b) accomplishing frequency-discrimination and multiplication of the second stream, by transforming the second stream into a second signal of value proportional to the product of the second stream frequency times a feedback value;
- (c) combining the first and second signals to produce an output value proportional to the feedback value;
- and
- (d) returning the feedback value to step (b), so that the feedback loop in the method causes the output value to vary in a manner which is proportional to the ratio of the first stream frequency divided by the second stream frequency.
Dependencies are inferred from the claim text.