GB1300807A – Data modulator employing sinusoidal synthesis
– Google Patents
GB1300807A – Data modulator employing sinusoidal synthesis
– Google Patents
Data modulator employing sinusoidal synthesis
Info
Publication number
GB1300807A
GB1300807A
GB43035/70A
GB4303570A
GB1300807A
GB 1300807 A
GB1300807 A
GB 1300807A
GB 43035/70 A
GB43035/70 A
GB 43035/70A
GB 4303570 A
GB4303570 A
GB 4303570A
GB 1300807 A
GB1300807 A
GB 1300807A
Authority
GB
United Kingdom
Prior art keywords
circuit
square waves
produce
mark
frequency
Prior art date
1969-09-17
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
Application number
GB43035/70A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Lockheed Corp
Original Assignee
Sanders Associates Inc
Priority date (The priority date 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 date listed.)
1969-09-17
Filing date
1970-09-08
Publication date
1972-12-20
1970-09-08
Application filed by Sanders Associates Inc
filed
Critical
Sanders Associates Inc
1972-12-20
Publication of GB1300807A
publication
Critical
patent/GB1300807A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
Classifications
H—ELECTRICITY
H04—ELECTRIC COMMUNICATION TECHNIQUE
H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
H04L27/00—Modulated-carrier systems
H04L27/26—Systems using multi-frequency codes
H—ELECTRICITY
H04—ELECTRIC COMMUNICATION TECHNIQUE
H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
H04L25/00—Baseband systems
H04L25/38—Synchronous or start-stop systems, e.g. for Baudot code
H04L25/40—Transmitting circuits; Receiving circuits
H04L25/49—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems
Abstract
1300807 Data transmission systems SANDERS ASSOCIATES Inc 8 Sept 1970 [17 Sept 1969] 43035/70 Heading H4P An F.S.K. modulator comprises a circuit 14 adapted to produce tone encoded signals, a square wave generating circuit 15 responsive to the tone encoded signals to produce four phase displaced square waves Q1, Q2, Q3, Q4, a circuit 16 for providing a weighted summation of the square waves to produce an approximate sine wave and a filter 17. Mark-space data from a source 11 is fed to the circuit 14 which provides a mark frequency, a space frequency and an end-of-message frequency tone. The circuit 15, which comprises a four stage counter, generates from each of its stages a respective one of the square waves Q1-Q4, the square waves being #/4 out of phase and having the mark, space or end-of-message frequency. The square waves are summed by weighted resistors in the circuit 16 and the resulting approximate sine wave which is free of harmonics is shaped and filtered by the filter 17 to produce a sine wave signal which is fed to a communication link 12, such as a transmission line, microwave link or radio link, by a transformer 18.
GB43035/70A
1969-09-17
1970-09-08
Data modulator employing sinusoidal synthesis
Expired
GB1300807A
(en)
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
US85872169A
1969-09-17
1969-09-17
Publications (1)
Publication Number
Publication Date
GB1300807A
true
GB1300807A
(en)
1972-12-20
Family
ID=25329005
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB43035/70A
Expired
GB1300807A
(en)
1969-09-17
1970-09-08
Data modulator employing sinusoidal synthesis
Country Status (10)
Country
Link
US
(1)
US3623160A
(en)
JP
(1)
JPS5014867B1
(en)
BE
(1)
BE756262A
(en)
CH
(1)
CH543839A
(en)
DE
(1)
DE2045559A1
(en)
FR
(1)
FR2064812A5
(en)
GB
(1)
GB1300807A
(en)
IL
(1)
IL35236A
(en)
NL
(1)
NL7013780A
(en)
SE
(1)
SE359004B
(en)
Cited By (2)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
GB2509146A
(en)
*
2012-12-21
2014-06-25
Lifescan Scotland Ltd
Hand held test meter with low-distortion signal generation
US9470649B2
(en)
2014-06-10
2016-10-18
Lifescan Scotland Limited
Hand-held test mester with low-distortion signal generation circuit
Families Citing this family (49)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US3761622A
(en)
*
1970-11-23
1973-09-25
Us Interior
Amplitude modulated telemetering system
NL160687C
(en)
*
1972-06-10
1979-11-15
Philips Nv
TONE GENERATOR FOR GENERATING SELECTED FREQUENCIES.
US3801807A
(en)
*
1972-10-27
1974-04-02
Bell Telephone Labor Inc
Improved shift register having (n/2 – 1) stages for digitally synthesizing an n-phase sinusoidal waveform
US3993989A
(en)
*
1975-05-19
1976-11-23
Trw Inc.
ELF communications system using HVDC transmission line as antenna
US4049909A
(en)
*
1975-10-29
1977-09-20
Bell Telephone Laboratories, Incorporated
Digital modulator
US5255269A
(en)
*
1992-03-30
1993-10-19
Spacecom Systems, Inc.
Transmission of data by frequency modulation using gray code
US6694128B1
(en)
1998-08-18
2004-02-17
Parkervision, Inc.
Frequency synthesizer using universal frequency translation technology
US7515896B1
(en)
1998-10-21
2009-04-07
Parkervision, Inc.
Method and system for down-converting an electromagnetic signal, and transforms for same, and aperture relationships
US6091940A
(en)
*
1998-10-21
2000-07-18
Parkervision, Inc.
Method and system for frequency up-conversion
US6061551A
(en)
1998-10-21
2000-05-09
Parkervision, Inc.
Method and system for down-converting electromagnetic signals
US7236754B2
(en)
1999-08-23
2007-06-26
Parkervision, Inc.
Method and system for frequency up-conversion
US6560301B1
(en)
1998-10-21
2003-05-06
Parkervision, Inc.
Integrated frequency translation and selectivity with a variety of filter embodiments
US6061555A
(en)
1998-10-21
2000-05-09
Parkervision, Inc.
Method and system for ensuring reception of a communications signal
US7039372B1
(en)
1998-10-21
2006-05-02
Parkervision, Inc.
Method and system for frequency up-conversion with modulation embodiments
US7295826B1
(en)
1998-10-21
2007-11-13
Parkervision, Inc.
Integrated frequency translation and selectivity with gain control functionality, and applications thereof
US6542722B1
(en)
1998-10-21
2003-04-01
Parkervision, Inc.
Method and system for frequency up-conversion with variety of transmitter configurations
US6049706A
(en)
*
1998-10-21
2000-04-11
Parkervision, Inc.
Integrated frequency translation and selectivity
US7321735B1
(en)
1998-10-21
2008-01-22
Parkervision, Inc.
Optical down-converter using universal frequency translation technology
US6813485B2
(en)
1998-10-21
2004-11-02
Parkervision, Inc.
Method and system for down-converting and up-converting an electromagnetic signal, and transforms for same
US6370371B1
(en)
1998-10-21
2002-04-09
Parkervision, Inc.
Applications of universal frequency translation
US7006805B1
(en)
1999-01-22
2006-02-28
Parker Vision, Inc.
Aliasing communication system with multi-mode and multi-band functionality and embodiments thereof, such as the family radio service
US6704549B1
(en)
1999-03-03
2004-03-09
Parkvision, Inc.
Multi-mode, multi-band communication system
US6704558B1
(en)
1999-01-22
2004-03-09
Parkervision, Inc.
Image-reject down-converter and embodiments thereof, such as the family radio service
US6873836B1
(en)
1999-03-03
2005-03-29
Parkervision, Inc.
Universal platform module and methods and apparatuses relating thereto enabled by universal frequency translation technology
US6853690B1
(en)
1999-04-16
2005-02-08
Parkervision, Inc.
Method, system and apparatus for balanced frequency up-conversion of a baseband signal and 4-phase receiver and transceiver embodiments
US6879817B1
(en)
1999-04-16
2005-04-12
Parkervision, Inc.
DC offset, re-radiation, and I/Q solutions using universal frequency translation technology
US7110435B1
(en)
1999-03-15
2006-09-19
Parkervision, Inc.
Spread spectrum applications of universal frequency translation
US7110444B1
(en)
1999-08-04
2006-09-19
Parkervision, Inc.
Wireless local area network (WLAN) using universal frequency translation technology including multi-phase embodiments and circuit implementations
US7693230B2
(en)
1999-04-16
2010-04-06
Parkervision, Inc.
Apparatus and method of differential IQ frequency up-conversion
US7065162B1
(en)
1999-04-16
2006-06-20
Parkervision, Inc.
Method and system for down-converting an electromagnetic signal, and transforms for same
US7072390B1
(en)
1999-08-04
2006-07-04
Parkervision, Inc.
Wireless local area network (WLAN) using universal frequency translation technology including multi-phase embodiments
US7054296B1
(en)
1999-08-04
2006-05-30
Parkervision, Inc.
Wireless local area network (WLAN) technology and applications including techniques of universal frequency translation
US8295406B1
(en)
1999-08-04
2012-10-23
Parkervision, Inc.
Universal platform module for a plurality of communication protocols
US7082171B1
(en)
1999-11-24
2006-07-25
Parkervision, Inc.
Phase shifting applications of universal frequency translation
US6963734B2
(en)
1999-12-22
2005-11-08
Parkervision, Inc.
Differential frequency down-conversion using techniques of universal frequency translation technology
US7292835B2
(en)
2000-01-28
2007-11-06
Parkervision, Inc.
Wireless and wired cable modem applications of universal frequency translation technology
US7010286B2
(en)
2000-04-14
2006-03-07
Parkervision, Inc.
Apparatus, system, and method for down-converting and up-converting electromagnetic signals
US7554508B2
(en)
2000-06-09
2009-06-30
Parker Vision, Inc.
Phased array antenna applications on universal frequency translation
US7454453B2
(en)
2000-11-14
2008-11-18
Parkervision, Inc.
Methods, systems, and computer program products for parallel correlation and applications thereof
US7010559B2
(en)
2000-11-14
2006-03-07
Parkervision, Inc.
Method and apparatus for a parallel correlator and applications thereof
WO2002041086A2
(en)
*
2000-11-16
2002-05-23
Invensys Systems, Inc.
Control system methods and apparatus for inductive communication across an isolation barrier
US7085335B2
(en)
2001-11-09
2006-08-01
Parkervision, Inc.
Method and apparatus for reducing DC offsets in a communication system
US7072427B2
(en)
2001-11-09
2006-07-04
Parkervision, Inc.
Method and apparatus for reducing DC offsets in a communication system
US6975848B2
(en)
2002-06-04
2005-12-13
Parkervision, Inc.
Method and apparatus for DC offset removal in a radio frequency communication channel
US7321640B2
(en)
2002-06-07
2008-01-22
Parkervision, Inc.
Active polyphase inverter filter for quadrature signal generation
US7379883B2
(en)
2002-07-18
2008-05-27
Parkervision, Inc.
Networking methods and systems
US7460584B2
(en)
2002-07-18
2008-12-02
Parkervision, Inc.
Networking methods and systems
US7386023B2
(en)
*
2004-11-17
2008-06-10
Intersil Americas Inc.
Systems and methods for reducing harmonics produced by oscillators
DE102018222288A1
(en)
*
2018-12-19
2020-06-25
Continental Teves Ag & Co. Ohg
High frequency generator
Family Cites Families (4)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US3521143A
(en)
*
1962-06-26
1970-07-21
Nasa
Static inverters which sum a plurality of waves
NL123270C
(en)
*
1963-07-09
US3324376A
(en)
*
1963-12-30
1967-06-06
Gen Precision Inc
Linear d.c. to a.c. converter
US3497625A
(en)
*
1965-07-15
1970-02-24
Sylvania Electric Prod
Digital modulation and demodulation in a communication system
1969
1969-09-17
US
US858721A
patent/US3623160A/en
not_active
Expired – Lifetime
1970
1970-09-03
IL
IL35236A
patent/IL35236A/en
unknown
1970-09-08
GB
GB43035/70A
patent/GB1300807A/en
not_active
Expired
1970-09-15
CH
CH1376770A
patent/CH543839A/en
not_active
IP Right Cessation
1970-09-15
DE
DE19702045559
patent/DE2045559A1/en
active
Pending
1970-09-15
FR
FR7033388A
patent/FR2064812A5/fr
not_active
Expired
1970-09-16
SE
SE12621/70A
patent/SE359004B/xx
unknown
1970-09-17
NL
NL7013780A
patent/NL7013780A/xx
unknown
1970-09-17
JP
JP45081889A
patent/JPS5014867B1/ja
active
Pending
1970-09-17
BE
BE756262D
patent/BE756262A/en
unknown
Cited By (3)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
GB2509146A
(en)
*
2012-12-21
2014-06-25
Lifescan Scotland Ltd
Hand held test meter with low-distortion signal generation
GB2509146B
(en)
*
2012-12-21
2014-11-05
Lifescan Scotland Ltd
Hand-held test meter with low-distortion signal generation circuit block
US9470649B2
(en)
2014-06-10
2016-10-18
Lifescan Scotland Limited
Hand-held test mester with low-distortion signal generation circuit
Also Published As
Publication number
Publication date
NL7013780A
(en)
1971-03-19
BE756262A
(en)
1971-03-01
FR2064812A5
(en)
1971-07-23
DE2045559A1
(en)
1971-03-25
JPS5014867B1
(en)
1975-05-30
US3623160A
(en)
1971-11-23
CH543839A
(en)
1973-10-31
SE359004B
(en)
1973-08-13
IL35236A0
(en)
1970-11-30
IL35236A
(en)
1973-05-31
Similar Documents
Publication
Publication Date
Title
GB1300807A
(en)
1972-12-20
Data modulator employing sinusoidal synthesis
GB1079928A
(en)
1967-08-16
A data transmission system
ES440226A1
(en)
1977-03-16
Digital frequency shift key modulator
GB1270802A
(en)
1972-04-19
Remote control of vending machines
US3391339A
(en)
1968-07-02
Phase-locked quadrature modulation transmission system
GB1241924A
(en)
1971-08-04
Electro-medical apparatus
GB1304188A
(en)
1973-01-24
GB1111553A
(en)
1968-05-01
Radio transmission systems
EP0257687A3
(en)
1989-12-20
Digital transmission system
GB1373748A
(en)
1974-11-13
Subaudible remote control tone encoding system
GB929025A
(en)
1963-06-19
Improvements in or relating to signal transmission systems
GB1091278A
(en)
1967-11-15
Improvements in or relating to multi-channel single-sideband carrier-frequency communication systems
GB1261837A
(en)
1972-01-26
Improvements in or relating to phase detection systems
GB1514519A
(en)
1978-06-14
High stability modulator for instrument landing systems
US3281766A
(en)
1966-10-25
Communication system
GB1253761A
(en)
1971-11-17
Radio direction finding system
JPS52109811A
(en)
1977-09-14
Amplitude phase modulation communication system
GB1448164A
(en)
1976-09-02
Terminals for fsk systems
JPS5647153A
(en)
1981-04-28
Digital phase modulation system
JPS5672548A
(en)
1981-06-16
Space diversity receiving system
JPS5513534A
(en)
1980-01-30
Frequency modulator
ATE313902T1
(en)
2006-01-15
FSK RECEIVER
JPS5635559A
(en)
1981-04-08
Phase modulating device
GB1399341A
(en)
1975-07-02
Hyperbolic navigation equipment
JPS53130008A
(en)
1978-11-13
Signal processing circuit
Legal Events
Date
Code
Title
Description
1973-05-02
PS
Patent sealed [section 19, patents act 1949]
1978-04-12
PLNP
Patent lapsed through nonpayment of renewal fees
