Abstract An analyzing system for detecting signals mixed with ambient noise. The desired signal with noise is fed to a bank of contiguously tuned filters which is followed by a bank of envelope detectors and then a bank of sample and hold circuits. A bank of comparators compare the values in the sample and hold circuits with the values in a ramp generator which is also fed to a ramp generator sample and hold circuit. The output of the comparator is summed, threshold detected, and fed to a trigger generator which triggers the ramp generator sample and hold circuit and also pulses a switching control circuit. The output of the ramp generator sample and hold circuit is scaled to become a reference signal and fed to an analog to digital converter. The outputs of the bank of sample and hold circuits are fed to a cell selector switch controlled by the switching control circuit and fed to the analog to digital converter. The switching control circuit also provides synchronizing pulses to the analog to digital converter, the bank of sample and hold circuits, and the ramp generator. The output of the analog to digital converter is averaged and threshold detected.
Inventors
👤 J Parker
👤 E Dawson
👤 A Kramer
Bibliographic Details
Application Number—
JurisdictionUS
Data Sourcegoogle_patents
Last Synchronized2026-10-25 06:01
CPC Classifications
H; H03; H03D; H03D1/00; H03D1/02; H03D1/04
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
251 words
A system for detecting a signal mixed with noise comprising: a. a bank of contiguously tuned filters each fed by said signal and said noise; b. a bank of envelope detectors fed by one each of a bank of tuned filters; c. a bank of envelope sample and hold circuits fed by one each of a bank of envelope detectors; d. a ramp generator; e. a bank of comparing circuits fed by the ramp generator and by one each of the bank of envelope sample and hold circuits for comparing the values of the envelope sample and hold circuits with the values of the ramp generator; f. means for summing the outputs of the bank of comparing circuits; g. a first means for detecting if the output of the summing means has reached a predetermined threshold; h. a trigger generator fed by the threshold detection means; i. a ramp generator sample and hold circuit fed by the ramp generator and the trigger generator; j. an analog to digital converter fed by the ramp generator sample and hold circuit; k. a switching control circuit fed by the trigger generator and feeding synchronizing pulses to the analog to digital converter, the envelope sample and hold circuits, and the ramp generator; l. a cell selector switch fed by the envelope sample and hold circuits and controlled by the switching control circuit, the cell control switch feeding the analog to digital converter; and m. a detector threshold circuit fed by the analog to digital converter.
Claim 2
Independent Claim
251 words
A system for detecting a signal mixed with noise comprising: a. a bank of contiguously tuned filters each fed by said signal and said noise; b. a bank of envelope detectors fed by one each of a bank of tuned filters; c. a bank of envelope sample and hold circuits fed by one each of a bank of envelope detectors; d. a ramp generator; e. a bank of comparing circuits fed by the ramp generator and by one each of the bank of envelope sample and hold circuits for comparing the values of the envelope sample and hold circuits with the values of the ramp generator; f. means for summing the outputs of the bank of comparing circuits; g. a first means for detecting if the output of the summing means has reached a predetermined threshold; h. a trigger generator fed by the threshold detection means; i. a ramp generator sample and hold circuit fed by the ramp generator and the trigger generator; j. an analog to digital converter fed by the ramp generator sample and hold circuit; k. a switching control circuit fed by the trigger generator and feeding synchronizing pulses to the analog to digital converter, the envelope sample and hold circuits, and the ramp generator; l. a cell selector switch fed by the envelope sample and hold circuits and controlled by the switching control circuit, the cell control switch feeding the analog to digital converter; and m. a detector threshold circuit fed by the analog to digital converter.
Claim 3
Dependent Claim
48 words
A system for detecting a signal mixed with noise according to claim 1 which further comprises: a. an averaging circuit interposed between the analog to digital converter and the detection threshold circuit; and b. a storage fed by the averaging circuit and feeding back to the averaging circuit.
Claim 4
Dependent Claim
44 words
A system for detecting a signal mixed with noise according to claim 2 which further comprises means for scaling the output of the ramp generator sample aNd hold circuit interposed between the ramp generator sample and hold circuit and the analog to digital converter.