US3727144A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Memory circuit employing a bipolar ultrasonic delay line
Assignee: NEC Corp
•
Filing: 1971-04-01
•
Granted: 1973-04-10
•
Expires: 1991-04-01
Abstract
Abstract Disclosed is a memory system including an ultrasonic delay line storing data signals having a period T, the data signals being stored as a bipolar signal. The positive and negative peaks of the bipolar signal are sensed to produce peak pulses. These peak pulses are used to generate a replica of the stored data signal. Ambiguous peak pulses are eliminated by passing all peak pulses through inhibit gate means, the gate means being operated to block each of those peak pulses which represents a peak of the bipolar signal occurring within a predetermined time, t, from its adjacent preceding peak. The predetermined time t is selected to be within the range defined as T/2<t < T.
Inventors
- 👤 T Senoo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:29
CPC Classifications
G; G11; G11C; G11C21/00; H; H03; H03K; H03K5/00; H03K5/153; H03K5/1532
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
202 words
A system for recovering binary data signals having a period T and being stored as a bipolar phase modulated signal in an ultrasonic delay line, said bipolar signal including ambiguous peaks, comprising: a. first and second peak signal detectors for generating respectively peak pulses corresponding to the positive and negative peaks of said bipolar signal, b. first and second inhibit pulse producing means responsive respectively to the signals from said first and second peak signal detectors for generating inhibit pulses having a predetermined time duration, said duration being less than the time T but greater than the time T/2, c. first gate means responsive to the inhibit pulses from said second inhibit pulse producing means for blocking pulses from said first peak detector which are in time coincidence with said inhibit pulses from said second inhibit pulse producing means, d. second gate means responsive to inhibit pulses from said first inhibit pulse producing means for blocking peak pulses from said second peak detector which are in time coincidence with said inhibit pulses from said first inhibit pulse producing means, and e. bistable means responsive to peak pulses from said first and second gate means for generating a replica of said data signals.
Claim 2
Independent Claim
202 words
A system for recovering binary data signals having a period T and being stored as a bipolar phase modulated signal in an ultrasonic delay line, said bipolar signal including ambiguous peaks, comprising: a. first and second peak signal detectors for generating respectively peak pulses corresponding to the positive and negative peaks of said bipolar signal, b. first and second inhibit pulse producing means responsive respectively to the signals from said first and second peak signal detectors for generating inhibit pulses having a predetermined time duration, said duration being less than the time T but greater than the time T/2, c. first gate means responsive to the inhibit pulses from said second inhibit pulse producing means for blocking pulses from said first peak detector which are in time coincidence with said inhibit pulses from said second inhibit pulse producing means, d. second gate means responsive to inhibit pulses from said first inhibit pulse producing means for blocking peak pulses from said second peak detector which are in time coincidence with said inhibit pulses from said first inhibit pulse producing means, and e. bistable means responsive to peak pulses from said first and second gate means for generating a replica of said data signals.
Claim 3
Dependent Claim
249 words
A data signal system for reading out stored data signals having a period T, said data signals being stored as a bipolar signal, said bipolar signal including ambiguous peaks, comprising: a. first and second peak signal detectors for generating peak pulses corresponding in time to positive and negative peaks, respectively, of said bipolar signal, and b. means for blocking each of those peak pulses which corresponds to a peak of said bipolar signal occuring within a predetermined time from the occurrence of its adjacent preceding peak, said predetermined time being greater than T/2 but less than T, c. wherein said means for blocking comprises: i. first and second inhibit pulse producing means responsive respectively to the signals from said first and second peak signal detectors for generating inhibit pulses having a predetermined time duration, said duration being less than the time T but greater than the time T/2, ii. first gate means responsive to inhibit pulses from said second inhibit pulse producing means for blocking peak pulses from said first peak detector occurring in time coincidence with said inhibit pulses from said second inhibit pulse producing means, iii. second gate means responsive to inhibit pulses from said first inhibit pulse producing means for blocking peak pulses from said second peak detector occurring in time coincidence with said inhibit pulses from said first inhibit pulse producing means, and iv. bistable means responsive to peak pulses from said first and second gate means for generating a replica of said data signals.
Claim 4
Dependent Claim
249 words
A data signal system for reading out stored data signals having a period T, said data signals being stored as a bipolar signal, said bipolar signal including ambiguous peaks, comprising: a. first and second peak signal detectors for generating peak pulses corresponding in time to positive and negative peaks, respectively, of said bipolar signal, and b. means for blocking each of those peak pulses which corresponds to a peak of said bipolar signal occuring within a predetermined time from the occurrence of its adjacent preceding peak, said predetermined time being greater than T/2 but less than T, c. wherein said means for blocking comprises: i. first and second inhibit pulse producing means responsive respectively to the signals from said first and second peak signal detectors for generating inhibit pulses having a predetermined time duration, said duration being less than the time T but greater than the time T/2, ii. first gate means responsive to inhibit pulses from said second inhibit pulse producing means for blocking peak pulses from said first peak detector occurring in time coincidence with said inhibit pulses from said second inhibit pulse producing means, iii. second gate means responsive to inhibit pulses from said first inhibit pulse producing means for blocking peak pulses from said second peak detector occurring in time coincidence with said inhibit pulses from said first inhibit pulse producing means, and iv. bistable means responsive to peak pulses from said first and second gate means for generating a replica of said data signals.
Claim 5
Dependent Claim
34 words
The data signal readout system of claim 2 wherein said first and second pulse producing means generate pulses having a time duration substantially equal to three quarters of the period of said data signals.
Claim 6
Dependent Claim
21 words
The data signal readout system of claim 2 wherein said bipolar phase modulated signal is stored in an ultrasonic delay line.
Claim 7
Dependent Claim
68 words
The data signal readout system of claim 4 wherein said first and second inhibit pulse producing means are comprised of monostable multivibrators and wherein said first and second peak signal detectors comprise respectively a positive peak detecting circuit and a differential pulse generator responsive to said positive peak detecting circuit and a negative peak detecting circuit and another differential pulse generator responsive to said negative peak detecting circuit.
References Cited (Backward Citations)
US2972735A
Cited
US3244986A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-04-09 | 1976-10-09 | 1977-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-09 | 1980-10-09 | 1981-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-09 | 1984-10-09 | 1985-04-10 | $7700.00 | Window Closed / Lapsed |