US3593165A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Comb filter with maximum value signal selection circuit
Assignee: Individual
•
Filing: 1966-09-26
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Granted: 1971-07-13
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Expires: 1986-09-26
Abstract
Abstract A maximum value signal selection circuit having a plurality of channels connected to receive signals from band-pass filters in a comb filter arrangement which rectifies and filters the signals and subtracts a voltage proportional to the sum of the rectified signals from each of the signals to provide a plurality of outputs wherein only the maximum signal channel produces a positive voltage.
Inventors
- 👤 Jack L Grubbs Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:34
CPC Classifications
G; G01; G01S; G01S15/00; G01S15/02; G01S15/50; G01S15/58; G01R; G01R23/00; Y; Y10; Y10S; Y10S367/00; Y10S367/901
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
128 words
A maximum value signal selection circuit for a comb filter having a plurality of band-pass filter elements comprising: a plurality of rectifier circuits individually connected to a respective one of said plurality of band-pass filter elements for converting the corresponding filter output to a unidirectional voltage, and an impedance element, all of said rectifier circuits being connected in common to said impedance element which is in turn connected to ground, (whereby the voltage developed across said impedance element is effectively subtracted) means for subtracting the voltage across said impedance element from each of the output voltages of said plurality of rectifier circuits (thereby providing) to provide a positive voltage at the filter element corresponding to the input signal frequency, all other filter elements being either negative or zero.
Claim 2
Dependent Claim
128 words
A maximum value signal selection circuit for a comb filter having a plurality of band-pass filter elements comprising: a plurality of rectifier circuits individually connected to a respective one of said plurality of band-pass filter elements for converting the corresponding filter output to a unidirectional voltage, and an impedance element, all of said rectifier circuits being connected in common to said impedance element which is in turn connected to ground, (whereby the voltage developed across said impedance element is effectively subtracted) means for subtracting the voltage across said impedance element from each of the output voltages of said plurality of rectifier circuits (thereby providing) to provide a positive voltage at the filter element corresponding to the input signal frequency, all other filter elements being either negative or zero.
Claim 3
Dependent Claim
43 words
A maximum value signal selection circuit as recited in claim 1 further comprising a plurality of transformers each connecting a respective one of said filter elements to its corresponding rectifier circuit and operating to remove the output of said filter elements from ground.
Claim 4
Dependent Claim
58 words
A maximum value signal selection circuit as recited in claim 2 further comprising a plurality of loads each connected across the output of a respective one of said plurality of rectifier circuits and including a load impedance and a diode connected in series, said diode serving to remove transient effects that could create spurious voltages at the outputs.
Claim 5
Dependent Claim
89 words
A maximum value signal selection circuit comprising in combination: means for filtering an input signal into a plurality of signals of different frequency bands, a plurality of means connected to receive each of said filtered signals, said means each comprising rectifier means for converting said signals to unidirectional voltages, means for subtracting a voltage proportional to the sum of said unidirectional voltages from each of said unidirectional voltages to provide a plurality of output voltages, a plurality of output means for providing each of said plurality of output voltages.
Claim 6
Dependent Claim
89 words
A maximum value signal selection circuit comprising in combination: means for filtering an input signal into a plurality of signals of different frequency bands, a plurality of means connected to receive each of said filtered signals, said means each comprising rectifier means for converting said signals to unidirectional voltages, means for subtracting a voltage proportional to the sum of said unidirectional voltages from each of said unidirectional voltages to provide a plurality of output voltages, a plurality of output means for providing each of said plurality of output voltages.
Claim 7
Dependent Claim
35 words
A maximum value signal selection circuit as recited in claim 4 further characterized in that said subtracting means comprises an impedance element connected between a point of reference potential and each of said rectifier means.
Claim 8
Dependent Claim
45 words
A maximum value signal selection circuit as described in claim 5 further characterized in that said output means each comprise terminal means and a load impedance and unidirectional conductive device connected in series between each of said terminal means and a point of reference potential.
Claim 9
Dependent Claim
26 words
A maximum value signal selection circuit as recited in claim 6 wherein said rectifier means comprises a unidirectionally conducting device shunted by a capacitive impedance element.
Claim 10
Dependent Claim
48 words
A maximum value signal selection circuit according to claim 4 further characterized in that said plurality of means connected to receive each of said filtered signals further comprises an impedance matching network and transformer means connected in cascade for providing a plurality of signals to said rectifier means.
References Cited (Backward Citations)
US3202968A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-07-12 | 1975-01-11 | 1975-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-12 | 1979-01-11 | 1979-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-12 | 1983-01-11 | 1983-07-13 | $7700.00 | Window Closed / Lapsed |