GB1305683A - Internal delay stabilization device for transponder - Google Patents
Internal delay stabilization device for transponderInfo
- Publication number
- GB1305683A GB1305683A GB2426471*A GB2426471A GB1305683A GB 1305683 A GB1305683 A GB 1305683A GB 2426471 A GB2426471 A GB 2426471A GB 1305683 A GB1305683 A GB 1305683A
- Authority
- GB
- United Kingdom
- Prior art keywords
- pulse
- response
- shift register
- stage
- input
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/74—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems
- G01S13/76—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems wherein pulse-type signals are transmitted
- G01S13/78—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems wherein pulse-type signals are transmitted discriminating between different kinds of targets, e.g. IFF-radar, i.e. identification of friend or foe
- G01S13/781—Secondary Surveillance Radar [SSR] in general
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/74—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems
- G01S13/76—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems wherein pulse-type signals are transmitted
- G01S13/78—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems wherein pulse-type signals are transmitted discriminating between different kinds of targets, e.g. IFF-radar, i.e. identification of friend or foe
- G01S13/781—Secondary Surveillance Radar [SSR] in general
- G01S13/784—Coders or decoders therefor; Degarbling systems; Defruiting systems
Landscapes
- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Radar Systems Or Details Thereof (AREA)
- Time-Division Multiplex Systems (AREA)
- Manipulation Of Pulses (AREA)
Abstract
1305683 Radar responder INTERNATIONAL STANDARD ELECTRIC CORP 19 April 1971 [17 April 1970] 27264/71 Heading H4L A transponder adapted to respond to incoming interrogation pulse pair signals spaced according to one or more modes and to transmit after a predetermined internal delay a corresponding response code comprises: a decoder I, Fig. 3 receiving the pulse pairs at a terminal 1, and generating a specific unique recognition signal for pulse pairs conforming to one or other of the modes; a response coder II comprising a coding memory 26a, 26b storing the digits of the coded response associated with each said mode, a coding device 27a, 27b, 28, 6 for receiving the coded response digits according to the recognized mode in response to a transfer pulse specific to said mode, and a coding clock 20 of period #c started by a response triggering pulse and which controls readout of the videofrequency response pulses at the output of said coding device; the internal delay being determined by a quantized delay device, Fig. 4, connected to terminal 1 via a gate circuit and controlled by a primary clock of period #a substantially less than #c to provide a quantized delay T1 between the device's input and output terminals, being an integral multiple of #a, the gate being switched by said recognition signal so as to restrict the passage to the second pulse only of the recognized interrogation pulse pair whereby to initiate the quantized delay and the generation of the triggering pulse at the output terminals of the delay device. The quantized delay device includes: a fast shift register 45 having k stages separated into first and second groups and stepping forward a source pulse formed at its input D and having the period #a defined by a stepping clock 46; a bistable circuit 43 applying, with very short delay, the video-frequency pulses to the input of the first state of the first group of the fast shift register 45 to form said source pulse of width shorter than or equal to #a; bistables and NOR gate (37a, 37b, 40) controlled by the interrogation recognition signal controlling operation of the first stage of the second group of the fast shift register to permit the source pulse corresponding to the second pulse pair pulse to progress through the second group stages ; bistables and NOR gates 37a, 37b, 39a, 39b, responsive to the source pulse when it appears at the output of the second group of stages and which transform it into the transfer pulse, the bistables and NOR gates 37a, 37b, 39a, 29b also forming, together with bistable 49 and a synchronous divider 50, a circuit generating the response triggering pulse at the time T1 which follows the input of the second pulse of the pulse pair into the first stage of the first group. The decoder I and the response coder II utilize the same slow shift register 6 in turn, stages thereof used for the coding being equal to the maximum number of digits in the coded response, plus one; the output of the first stage of the second group of the fast shift register 45 being connected to the reset inputs C of the stages of the slow shift register 6, except to the first stage (right hand end) input; the slow shift register stage set inputs P, except for the first stage input, being connected to the corresponding outputs of the coding memory 26a, 26b via the AND gates 27a, 27b and common NOR gates 28, for simultaneously introducing, in response to application of the transfer pulse, the coded response digits into the slow shift register; and the slow shift register first stage reset input being connected to the reset inputs of the synchronous divider 50 so as to clear the shift register operation from operating as the coding device. By such digital processing the response delay of the responder is caused to have an uncertainty of only (LŒ45)ns.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7014007A FR2085411A1 (en) | 1970-04-17 | 1970-04-17 | TRANSPONDER WITH INTERNAL DELAY STABILIZATION DEVICE |
FR7023555A FR2092858A2 (en) | 1970-04-17 | 1970-06-15 | TRANSPONDER WITH INTERNAL DELAY STABILIZATION DEVICE |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1305683A true GB1305683A (en) | 1973-02-07 |
Family
ID=9057787
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2426471*A Expired GB1305683A (en) | 1970-04-17 | 1971-04-19 | Internal delay stabilization device for transponder |
Country Status (4)
Country | Link |
---|---|
DE (1) | DE2131353B2 (en) |
FR (2) | FR2085411A1 (en) |
GB (1) | GB1305683A (en) |
IT (1) | IT996043B (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2747388A1 (en) * | 1977-10-21 | 1979-04-26 | Siemens Ag | Wireless closed loop alarm system - uses digital signals with ROM-controlled code and two transceivers with logic circuitry |
DE2946942C2 (en) * | 1979-11-21 | 1985-07-18 | Brown, Boveri & Cie Ag, 6800 Mannheim | Method for recognizing a large number of objects |
CN110361715B (en) * | 2019-08-21 | 2023-03-10 | 深圳市镭神智能系统有限公司 | Pulse coding device, coding method and laser radar system |
CN111273233B (en) * | 2020-03-04 | 2022-05-03 | 北京环境特性研究所 | Asynchronous pulse detection method and device for electronic corner reflector |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1536235A (en) * | 1966-05-02 | 1968-08-16 | Cossor Ltd A C | Trigger pulse generator |
-
1970
- 1970-04-17 FR FR7014007A patent/FR2085411A1/en active Granted
- 1970-06-15 FR FR7023555A patent/FR2092858A2/en active Granted
-
1971
- 1971-04-19 GB GB2426471*A patent/GB1305683A/en not_active Expired
- 1971-06-23 IT IT8953771A patent/IT996043B/en active
- 1971-06-24 DE DE19712131353 patent/DE2131353B2/en not_active Withdrawn
Also Published As
Publication number | Publication date |
---|---|
DE2131353B2 (en) | 1977-06-30 |
DE2117340B2 (en) | 1976-01-02 |
FR2085411B1 (en) | 1974-09-20 |
FR2085411A1 (en) | 1971-12-24 |
DE2131353A1 (en) | 1971-12-30 |
FR2092858A2 (en) | 1972-01-28 |
FR2092858B2 (en) | 1974-09-20 |
DE2117340A1 (en) | 1971-10-28 |
IT996043B (en) | 1975-12-10 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US3395400A (en) | Serial to parallel data converter | |
US3327226A (en) | Anticoincidence circuit | |
US3072855A (en) | Interference removal device with revertive and progressive gating means for setting desired signal pattern | |
US3125691A (en) | Pulse strecher employing alternately actuated monostable circuits feeding combining circuit to effect streching | |
GB1305683A (en) | Internal delay stabilization device for transponder | |
GB986148A (en) | Synchronized signal pulse circuit | |
US3056049A (en) | Circuit for converting an analog quantity to a digital quantity | |
SU1019616A1 (en) | Time selector | |
SU1091162A2 (en) | Priority block | |
SU786007A1 (en) | Inhibition device | |
GB924203A (en) | Improvements in memory elements | |
GB1176556A (en) | Improvements in Digital Differentiators | |
GB1077424A (en) | Improvements in secondary radar systems | |
SU411628A1 (en) | ||
SU373885A1 (en) | COUNTER OF PULSES ON POTENTIAL ELEMENTS | |
SU454546A1 (en) | Device for generating a signal for the end of the exchange of information | |
SU444314A1 (en) | Multipoint pulse frequency comparator | |
SU377854A1 (en) | ALL-UNION PAT1; itkO "11sh;" ^ those | |
SU1226624A1 (en) | Pulser | |
SU470922A1 (en) | Pulse counting device | |
SU1008894A1 (en) | Pulse shaper | |
SU384193A1 (en) | DEVICE FOR TRANSMITTING NUMBER OF NUMBER IMPULSE CODE | |
SU1765895A1 (en) | Device for conversion of binary unitary code to complete binary code | |
SU374606A1 (en) | DEVICE FOR COLLECTION OF COMBINATIONS | |
SU467466A1 (en) | Team Encryptor |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed [section 19, patents act 1949] | ||
746 | Register noted 'licences of right' (sect. 46/1977) | ||
PCNP | Patent ceased through non-payment of renewal fee |