Patent US3609663A successfully refreshed from Google Patents.
US3609663A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Predetection signal-processing system
Assignee: Raytheon Co
•
Filing: 1969-07-30
•
Granted: 1971-09-28
•
Expires: 1989-07-30
Abstract
Abstract A regenerative signal-processing system in which a multiplicity of incoming signals are combined prior to detection. By heterodyning each incoming signal with a common signal, difference frequency signals are generated. Each of these difference frequency signals controls a phase shift that is applied to the corresponding incoming signal and a resultant signal is formed and all resultant signals have the same phase and are combined to produce an output signal which is in the same frequency band as the incoming signal.
Inventors
- 👤 William J Bickford
- 👤 Richard G Cease
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:10
CPC Classifications
H; H04; H04B; H04B7/00; H04B7/02; H04B7/04; H04B7/08; H04B7/0837
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
102 words
In combination: means for receiving input information signals of varying relative phase; a pair of means each including heterodyning, combining and filtering means serially connected to said receiving means for providing output signals containing said input information and with the relative phase of the output signals substantially independent of said input information signals and the frequency of said output signals substantially unshifted in frequency from said input information signals; and feedback means fed by said output signals including a loop regenerative only at approximately zero Hz., said loop including means for multiplying said information containing output signals with said input information signals.
Claim 2
Dependent Claim
102 words
In combination: means for receiving input information signals of varying relative phase; a pair of means each including heterodyning, combining and filtering means serially connected to said receiving means for providing output signals containing said input information and with the relative phase of the output signals substantially independent of said input information signals and the frequency of said output signals substantially unshifted in frequency from said input information signals; and feedback means fed by said output signals including a loop regenerative only at approximately zero Hz., said loop including means for multiplying said information containing output signals with said input information signals.
Claim 3
Independent Claim
155 words
A system comprising: means for receiving input information signals of varying relative phase; at least first and second multiplying means coupled in parallel to said receiving means; said filtering means for filtering the signals from each of said first and second multiplying means; at least third and fourth multiplying means for multiplying the outputs of each of said filtering means with said input information signals; means for summing the outputs from each of said third and fourth multiplying means to provide output signals containing said input information and with the relative phase of the output signals substantially independent of said input information signals and the frequency of said output signals unshifted in frequency from said input information signals; and feedback means fed by said output signals including a loop regenerative only at approximately 0 Hz. connected to each of said first and second multiplying means for multiplying said output signals with said input information signals.
Claim 4
Independent Claim
155 words
A system comprising: means for receiving input information signals of varying relative phase; at least first and second multiplying means coupled in parallel to said receiving means; said filtering means for filtering the signals from each of said first and second multiplying means; at least third and fourth multiplying means for multiplying the outputs of each of said filtering means with said input information signals; means for summing the outputs from each of said third and fourth multiplying means to provide output signals containing said input information and with the relative phase of the output signals substantially independent of said input information signals and the frequency of said output signals unshifted in frequency from said input information signals; and feedback means fed by said output signals including a loop regenerative only at approximately 0 Hz. connected to each of said first and second multiplying means for multiplying said output signals with said input information signals.
Claim 5
Independent Claim
196 words
A system comprising: means for receiving input information signals of varying relative phase in at least first and second channels; at least a first pair of multiplying means coupled in parallel to said first and second channels; a plurality of filtering means corresponding to each of said multiplying means for filtering said input information signals from said corresponding multiplying means; at least a second pair of multiplying means coupled to each of said filtering means for multiplying the outputs of each of said filtering means with said input information signals; means for summing the outputs from said second pair of multiplying means to provide output signals containing said input information and with the relative phase of said output signals substantially independent of the phase of said input information signals substantially independent of the phase of said input information signals and the frequency of said output signals unshifted in frequency from the frequency of said input information signals; and feedback means fed by said output signals including a positive feedback loop regenerative only at approximately 0 Hz. connected to each of said first pair of multiplying means for multiplying said output signals with said input information signals.
Claim 6
Independent Claim
196 words
A system comprising: means for receiving input information signals of varying relative phase in at least first and second channels; at least a first pair of multiplying means coupled in parallel to said first and second channels; a plurality of filtering means corresponding to each of said multiplying means for filtering said input information signals from said corresponding multiplying means; at least a second pair of multiplying means coupled to each of said filtering means for multiplying the outputs of each of said filtering means with said input information signals; means for summing the outputs from said second pair of multiplying means to provide output signals containing said input information and with the relative phase of said output signals substantially independent of the phase of said input information signals substantially independent of the phase of said input information signals and the frequency of said output signals unshifted in frequency from the frequency of said input information signals; and feedback means fed by said output signals including a positive feedback loop regenerative only at approximately 0 Hz. connected to each of said first pair of multiplying means for multiplying said output signals with said input information signals.
Claim 7
Dependent Claim
16 words
A system in accordance with claim 3 wherein said positive feedback loop includes a linear-amplifying means.
Claim 8
Independent Claim
249 words
A system comprising: means for receiving input information signals of varying relative phase in a plurality of input channels; a plurality of pairs of combining circuits, each of which pair is coupled to a corresponding input channel; one of each of said pairs of combining circuits including a first multiplying means to which said input information signals are applied, a filtering means for filtering the output from said firsT multiplying means, and a second multiplying means for multiplying the output from said filtering means and said input information signals; the other of each of said pairs of combining circuits including means for shifting the phase of said input information signal, a first multiplying means to which the phase shifted input information signal is applied, a filtering means for filtering the output of said first multiplying means, and a second multiplying means for multiplying the output of said filtering means and said input information signals; means for summing the outputs from each of said second multiplying means to provide output signals containing said input signal information and with the relative phase of said output signals substantially independent of said input information signals and the frequency of said output signals unshifted in frequency from said input information signals; and feedback means fed by said output signals including a positive feedback loop regenerative only at approximately 0 Hz. connected to each of said first multiplying means in said plurality of input channels for multiplying said output signals with said input information signals.
Claim 9
Independent Claim
249 words
A system comprising: means for receiving input information signals of varying relative phase in a plurality of input channels; a plurality of pairs of combining circuits, each of which pair is coupled to a corresponding input channel; one of each of said pairs of combining circuits including a first multiplying means to which said input information signals are applied, a filtering means for filtering the output from said firsT multiplying means, and a second multiplying means for multiplying the output from said filtering means and said input information signals; the other of each of said pairs of combining circuits including means for shifting the phase of said input information signal, a first multiplying means to which the phase shifted input information signal is applied, a filtering means for filtering the output of said first multiplying means, and a second multiplying means for multiplying the output of said filtering means and said input information signals; means for summing the outputs from each of said second multiplying means to provide output signals containing said input signal information and with the relative phase of said output signals substantially independent of said input information signals and the frequency of said output signals unshifted in frequency from said input information signals; and feedback means fed by said output signals including a positive feedback loop regenerative only at approximately 0 Hz. connected to each of said first multiplying means in said plurality of input channels for multiplying said output signals with said input information signals.
Claim 10
Dependent Claim
57 words
A system according to claim 5 wherein: said filtering means are all low-pass filters. A system according to claim 5 wherein: said positive feedback loop includes means for summing the outputs from said summing means associated with each of said input channels to form a single output and means for controlling the amplitude of said single output.
Claim 11
Dependent Claim
43 words
A system according to claim 5 wherein: said positive feedback loop includes means for summing the outputs from said summing means associated with each of said input channels to form a single output and means for controlling the amplitude of said single output.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-27 | 1975-03-29 | 1975-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-27 | 1979-03-29 | 1979-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-27 | 1983-03-29 | 1983-09-28 | $7700.00 | Window Closed / Lapsed |