Automatic omega signal pattern synchronizing system

Claim 2

An automatic omega signal pattern synchronizing system comprising detection means responsive to a received signal for providing a first output indicative of a received signal above a predetermined level and a second output indicative of the received signal above a predetermined level also having a predetermined duration, a pattern generator producing an output signal, means responsive to the second output of said detection means for resetting said pattern generator, and means for detecting the time difference between said first output of said detection means and the output signal of said pattern generator and producing an inhibit output signal when the output signal of said pattern generator is synchronized with the received signal within a predetermined time difference for inhibiting the resetting of said pattern generator.

Claim 3

An automatic omega signal pattern synchronizing system according to claim 1, wherein said means for resetting said pattern generator comprises means for generating a pulse in synchronism with the instant of fall of the second output of said detection means, and means for frequency dividing said pulses generated in synchronism with the instant of fall of the second output to produce frequency-divided, corresponding reset pulses for resetting said pattern generator.

Claim 4

An automatic omega signal pattern synchronizing system according to claim 1, wherein said detection means comprises means for detecting the envelope of a received signal, level detection means for comparing the detected envelope with a reference voltage of a predetermined level and producing said first output when said detected envelope exceeds said predetermined level of said reference voltage, means responsive to the output of said level detection means for producing a sawtooth wave, and means for comparing the sawtooth wave with further predetermined level and producing said second output when the sawtooth wave exceeds said further predetermined level, thereby detecting the duration of the received signal.

Claim 5

An automatic omega signal pattern synchronizing system according to claim 3, wherein said detection means includes means responsive to the leading edge of the output of said level detection means for generating a clock pulse, and digital means actuated by the clock pulse for detecting the time width of the output of said level detection means.

Claim 6

An automatic omega signal pattern synchronizing System comprising detection means responsive to a received signal for providing a first output indicative of a received signal above a predetermined level and a second output indicative of the received signal above a predetermined level also having a predetermined duration; means for generating a pulse at the instant of fall of the second output of said detection means; a pattern generator producing plural output code signals; means for frequency dividing the pulses generated at the instant of fall of the said second output of said detection means to produce corresponding, frequency-divided, reset pulses for resetting said pattern generator; selection means for selecting and deriving at least first and second code signals from the output of said pattern generator; at least first and second synchronized state memory circuits responsive to the rise of the selected, said at least first and second code signals, respectively, for being set thereby; means for measuring the time differences between the occurrence of said selected, at least first and second code signals of said plural output code signals of said pattern generator and said first output of said detection means; operative when the time difference exceeds a certain value for resetting the corresponding said synchronized state memory circuits, and means responsive to the simultaneous set condition of all said synchronized state memory circuits for inhibiting the resetting of said pattern generator.

Claim 7

An automatic omega signal pattern synchronizing System comprising detection means responsive to a received signal for providing a first output indicative of a received signal above a predetermined level and a second output indicative of the received signal above a predetermined level also having a predetermined duration; means for generating a pulse at the instant of fall of the second output of said detection means; a pattern generator producing plural output code signals; means for frequency dividing the pulses generated at the instant of fall of the said second output of said detection means to produce corresponding, frequency-divided, reset pulses for resetting said pattern generator; selection means for selecting and deriving at least first and second code signals from the output of said pattern generator; at least first and second synchronized state memory circuits responsive to the rise of the selected, said at least first and second code signals, respectively, for being set thereby; means for measuring the time differences between the occurrence of said selected, at least first and second code signals of said plural output code signals of said pattern generator and said first output of said detection means; operative when the time difference exceeds a certain value for resetting the corresponding said synchronized state memory circuits, and means responsive to the simultaneous set condition of all said synchronized state memory circuits for inhibiting the resetting of said pattern generator.