Non-ringing phase responsive detector

Details Non-ringing phase responsive detector Non-ringing phase responsive detector

1981-06-12

1983-11-08

Nussbaum, Marvin L.

Wave transmission lines and networks

Coupling networks

Frequency domain filters utilizing only lumped parameters

328138, 328140, 324 78F, 333176, H03H 701, H03K 526

Patent

active

044145179

ABSTRACT:
A non-ringing circuit for detecting the presence of predetermined frequency components in input signals and for delivering an output signal when a predetermined component is dominant, the circuit employing plural tuned filters with different adjacent cross-over frequencies, and using coincidence detectors connected to pairs of these filters in such a way as to detect when there exists a dominant frequency component having a frequency so located with respect to said cross-over frequencies that the relative phases of the signals fed to the coincidence detectors from the filters will produce phase coincidences therein, the circuit further using multiple different paired filters having staggered cross-over frequencies such that the tendencies of these filters to ring as a result of transient excitations will produce diverse and non-coincident ringing wave forms.

REFERENCES:
patent: 3747025 (1973-07-01), Iten et al.
patent: 3761740 (1973-09-01), Naive
patent: 4145660 (1979-03-01), Allen et al.
patent: 4215280 (1980-07-01), Mahig

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