US3576497A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coincidence detector and separator for a counter
Assignee: United States Department of the Navy
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Filing: 1968-11-12
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Granted: 1971-04-27
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Expires: 1988-11-12
Abstract
Abstract A device which permits a pulse triggered counter to accept pulse trains from one or more inputs where the pulses arriving at the inputs may be time domain coincident, which is the occurrence of two pulses within a specified time interval. The device delays one of the simultaneous pulses in time to permit it to be counted at a later time.
Inventors
- 👤 Samuel A Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:49
CPC Classifications
H; H03; H03K; H03K21/00; H03K21/02; H03K5/00; H03K5/13
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
145 words
An apparatus which permits a pulse triggered device to accept pulse trains having a pulse repetition frequency greater than the pulse repetition frequency of the device comprising: input means adapted to receive more than two pulse trains; detection means to determine when pulses arrive at the input means; gating means to pass through to said pulse triggered device the first pulse in a series of pulses occurring during a predetermined period of time corresponding to the pulse repetition frequency of the pulse triggered device which time is called the ''''forbidden time;'''' pulse storage means to store pulses arriving at the input means after the first pulse and during the ''''forbidden time;'''' ''''artificial pulse'''' generating means; and triggering means responsive to said pulse detection means to cause the ''''artificial pulse'''' generating means to output a pulse corresponding to the pulses stored in said pulse storage means.
Claim 2
Independent Claim
145 words
An apparatus which permits a pulse triggered device to accept pulse trains having a pulse repetition frequency greater than the pulse repetition frequency of the device comprising: input means adapted to receive more than two pulse trains; detection means to determine when pulses arrive at the input means; gating means to pass through to said pulse triggered device the first pulse in a series of pulses occurring during a predetermined period of time corresponding to the pulse repetition frequency of the pulse triggered device which time is called the ''''forbidden time;'''' pulse storage means to store pulses arriving at the input means after the first pulse and during the ''''forbidden time;'''' ''''artificial pulse'''' generating means; and triggering means responsive to said pulse detection means to cause the ''''artificial pulse'''' generating means to output a pulse corresponding to the pulses stored in said pulse storage means.
Claim 3
Dependent Claim
29 words
The apparatus as described in claim 1 wherein the input means adapted to receive more than two pulse trains comprises: a first input terminal; and a second input terminal.
Claim 4
Dependent Claim
51 words
The apparatus as described in claim 2 wherein the detection means comprises: a first flip-flop capable of being set and reset wherein: the flip-flop is set in response to a pulse entering the first input terminal, and the flip-flop is reset in response to a pulse entering the second input terminal.
Claim 5
Dependent Claim
101 words
The apparatus as described in claim 3 wherein the gating means to pass through to said pulse triggered device comprises: a first AND gate which is enabled by a logical ONE generated by the first flip-flop while in the SET position so that a first pulse entering the first input terminal will pass through to the pulse triggered device; and a second AND gate which is enabled by a logical ONE generated by the first flip-flop while in the RESET position so that if a first pulse enters the second input terminal it will pass through to said pulse triggered device.
Claim 6
Dependent Claim
141 words
The apparatus as described in claim 4 wherein the pulse storage means comprises: a first one-shot monostable multivibrator: which triggers upon receipt of a pulse into either the first input terminal OR the second input terminal, and having a time constant equal to the ''''forbidden time;'''' means for preventing resetting of the first flip-flop during the forbidden time; a third AND gate logically connected to the second input terminal and which is enabled by the combination of: an output from said first one-shot monostable multivibrator, and a logical ONE generated by the first flip-flop while in the SET position; and a fourth AND gate logically connected to the first input terminal and which is enabled by the combination of: an output from said first one-shot monostable multivibrator, and a logical ONE generated by the first flip-flop while in the RESET position.
Claim 7
Dependent Claim
99 words
The apparatus as described in claim 5 wherein the means for preventing resetting of the first flip-flop during the forbidden time comprises: a first inhibited AND gate logically connected to the SET terminal of said first flip-flop; a second inhibited AND gate logically connected to the RESET terminal of said first flip-flop; and the first and second inhibited AND gates are disabled during the ''''forbidden time'''' where there is an output from the first one-shot monostable multivibrator; so that pulses entering the first and second input terminals cannot set or reset, respectively, the first flip-flop during the ''''forbidden time.''''
Claim 8
Dependent Claim
83 words
The apparatus as described in claim 5 wherein the ''''artificial pulse'''' generating means comprises: a second flip-flop capable of being set and reset wherein the flip-flop is set by either: a second pulse occurring during the ''''forbidden time'''' and passing through the third AND gate, or a second pulse occurring during the ''''forbidden time'''' and passing through the fourth AND gate; and a fifth AND gate which is enabled by a logical ONE generated by the second flip-flop while in the SET position.
Claim 9
Dependent Claim
65 words
The apparatus as described in claim 7 wherein the triggering means responsive to said pulse detection means comprises: a second one-shot monostable multivibrator: logically connected to said pulse triggered device, having a ''''pulselike'''' output, and which triggers upon receipt of the trailing edge of the inverted output of the first one-shot monostable multivibrator via said fifth AND gate; and means for resetting said second flip-flop.
Claim 10
Dependent Claim
87 words
The apparatus as described in claim 8 wherein the means for resetting the second flip-flop comprises: a third inhibited AND gate logically connected to the reset terminal of the second flip-flop; the third inhibited AND gate is disabled to prevent a pulse ocCurring during the ''''forbidden time'''' and subsequent to the setting pulse from resetting the second flip-flop, and the second flip-flop is reset by the output of the second one-shot monostable multivibrator which passes through the third inhibited AND gate which is enabled for this purpose.
References Cited (Backward Citations)
US3327226A
Cited
US3441342A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-04-26 | 1974-10-26 | 1975-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-26 | 1978-10-26 | 1979-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-26 | 1982-10-26 | 1983-04-27 | $7700.00 | Window Closed / Lapsed |