GB1249542A – A digital modulator
– Google Patents
GB1249542A – A digital modulator
– Google Patents
A digital modulator
Info
Publication number
GB1249542A
GB1249542A
GB43736/69A
GB4373669A
GB1249542A
GB 1249542 A
GB1249542 A
GB 1249542A
GB 43736/69 A
GB43736/69 A
GB 43736/69A
GB 4373669 A
GB4373669 A
GB 4373669A
GB 1249542 A
GB1249542 A
GB 1249542A
Authority
GB
United Kingdom
Prior art keywords
signal
gates
fed
digital
signals
Prior art date
1968-10-15
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
GB43736/69A
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.)
International Business Machines Corp
Original Assignee
International Business Machines Corp
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.)
1968-10-15
Filing date
1969-09-04
Publication date
1971-10-13
1969-09-04
Application filed by International Business Machines Corp
filed
Critical
International Business Machines Corp
1971-10-13
Publication of GB1249542A
publication
Critical
patent/GB1249542A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
Classifications
H—ELECTRICITY
H03—ELECTRONIC CIRCUITRY
H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
H03M1/00—Analogue/digital conversion; Digital/analogue conversion
H03M1/66—Digital/analogue converters
H03M1/82—Digital/analogue converters with intermediate conversion to time interval
Abstract
1,249,542. Digital/analogue converters. INTERNATIONAL BUSINESS MACHINES CORP. 4 Sept., 1969 [15 Oct., 1968], No. 43736/69. Heading G4H. A signal from a source 10 is modulated under the control of a digital signal held in store 14, chopper 11 being enabled to pass the signal 10 for a duration determined by the digital control signal. In the embodiment of Fig. 1 successively occurring binary weighted duration signals from single shot circuits S32… S1 are fed to gates G primed by the control signals, the outputs of the gates G being fed to a common OR gate 15. In a second embodiment the duration signals are derived from six AND gates (Fig. 4 not shown), the nth gate receiving the n + 1 most significant bits from a frequency divider, the least significant of which is fed to the gate via an inverter.
GB43736/69A
1968-10-15
1969-09-04
A digital modulator
Expired
GB1249542A
(en)
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
US76775468A
1968-10-15
1968-10-15
Publications (1)
Publication Number
Publication Date
GB1249542A
true
GB1249542A
(en)
1971-10-13
Family
ID=25080473
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB43736/69A
Expired
GB1249542A
(en)
1968-10-15
1969-09-04
A digital modulator
Country Status (5)
Country
Link
US
(1)
US3548342A
(en)
JP
(1)
JPS4844819B1
(en)
DE
(1)
DE1951863A1
(en)
FR
(1)
FR2020707A1
(en)
GB
(1)
GB1249542A
(en)
Families Citing this family (49)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US3766497A
(en)
*
1972-01-21
1973-10-16
Power Control Corp
Method and apparatus for pulse width modulation with variable frequency modes
US3764992A
(en)
*
1972-02-14
1973-10-09
Bell Telephone Labor Inc
Program-variable clock pulse generator
GB1432373A
(en)
*
1972-08-15
1976-04-14
Indep Broadcasting Authority
Apparatus for producing digised signals for defining an amplitude modulated sub-carrier
US3789304A
(en)
*
1972-10-19
1974-01-29
Bell Telephone Labor Inc
Gated dividing circuit with reduced time variation between gating and an output signal
JPS5210818U
(en)
*
1975-07-12
1977-01-25
US4220895A
(en)
*
1978-08-25
1980-09-02
Esquire, Inc.
Non-interfering, overlapping high frequency signalling for lamp dimmer circuit
DE3342739C2
(en)
*
1982-11-25
1986-10-02
Wolf-Dieter Dipl.-Ing. 8013 Haar Schleifer
A / D and D / A conversion
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
US6061551A
(en)
1998-10-21
2000-05-09
Parkervision, Inc.
Method and system for down-converting electromagnetic signals
US6091940A
(en)
*
1998-10-21
2000-07-18
Parkervision, Inc.
Method and system for frequency up-conversion
US6542722B1
(en)
1998-10-21
2003-04-01
Parkervision, Inc.
Method and system for frequency up-conversion with variety of transmitter configurations
US7236754B2
(en)
1999-08-23
2007-06-26
Parkervision, Inc.
Method and system for frequency up-conversion
US6049706A
(en)
1998-10-21
2000-04-11
Parkervision, Inc.
Integrated frequency translation and selectivity
US6560301B1
(en)
1998-10-21
2003-05-06
Parkervision, Inc.
Integrated frequency translation and selectivity with a variety of filter embodiments
US7039372B1
(en)
1998-10-21
2006-05-02
Parkervision, Inc.
Method and system for frequency up-conversion with modulation embodiments
US6370371B1
(en)
1998-10-21
2002-04-09
Parkervision, Inc.
Applications of universal frequency translation
US7295826B1
(en)
1998-10-21
2007-11-13
Parkervision, Inc.
Integrated frequency translation and selectivity with gain control functionality, and applications thereof
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
US7321735B1
(en)
1998-10-21
2008-01-22
Parkervision, Inc.
Optical down-converter using universal frequency translation technology
US6061555A
(en)
1998-10-21
2000-05-09
Parkervision, Inc.
Method and system for ensuring reception of a communications signal
US6704549B1
(en)
1999-03-03
2004-03-09
Parkvision, Inc.
Multi-mode, multi-band communication system
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
US6704558B1
(en)
1999-01-22
2004-03-09
Parkervision, Inc.
Image-reject down-converter and embodiments thereof, such as the family radio service
US6879817B1
(en)
1999-04-16
2005-04-12
Parkervision, Inc.
DC offset, re-radiation, and I/Q solutions using 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
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
US7110435B1
(en)
1999-03-15
2006-09-19
Parkervision, Inc.
Spread spectrum applications of universal frequency translation
US7065162B1
(en)
1999-04-16
2006-06-20
Parkervision, Inc.
Method and system for down-converting an electromagnetic signal, and transforms for same
US7693230B2
(en)
1999-04-16
2010-04-06
Parkervision, Inc.
Apparatus and method of differential IQ frequency up-conversion
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
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
US7010559B2
(en)
2000-11-14
2006-03-07
Parkervision, Inc.
Method and apparatus for a parallel correlator and applications thereof
US7454453B2
(en)
2000-11-14
2008-11-18
Parkervision, Inc.
Methods, systems, and computer program products for parallel correlation and applications thereof
US7072427B2
(en)
2001-11-09
2006-07-04
Parkervision, Inc.
Method and apparatus for reducing DC offsets in a communication system
US7085335B2
(en)
2001-11-09
2006-08-01
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
US7460584B2
(en)
2002-07-18
2008-12-02
Parkervision, Inc.
Networking methods and systems
US7379883B2
(en)
2002-07-18
2008-05-27
Parkervision, Inc.
Networking methods and systems
US10571393B2
(en)
*
2018-04-13
2020-02-25
Tsinghua University
Terahertz gas detection method and device based on Gregory double reflection antenna
Family Cites Families (5)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US2478919A
(en)
*
1943-07-17
1949-08-16
Rca Corp
Pulse type multiplex communication system
US2680153A
(en)
*
1949-01-14
1954-06-01
Philco Corp
Multichannel communication system
GB988892A
(en)
*
1961-09-06
1965-04-14
Hitachi Ltd
Time division, multiplex pulse code modulation system
US3358068A
(en)
*
1964-06-26
1967-12-12
Seeburg Corp
Automatic rhythm device
FR1460565A
(en)
*
1965-05-21
1966-03-04
Alcatel Sa
Modulation method for the transmission of digital data and equipment for its implementation
1968
1968-10-15
US
US767754A
patent/US3548342A/en
not_active
Expired – Lifetime
1969
1969-09-04
GB
GB43736/69A
patent/GB1249542A/en
not_active
Expired
1969-09-16
FR
FR6932235A
patent/FR2020707A1/fr
not_active
Withdrawn
1969-10-06
JP
JP44079271A
patent/JPS4844819B1/ja
active
Pending
1969-10-15
DE
DE19691951863
patent/DE1951863A1/en
active
Pending
Also Published As
Publication number
Publication date
DE1951863A1
(en)
1970-04-30
JPS4844819B1
(en)
1973-12-27
US3548342A
(en)
1970-12-15
FR2020707A1
(en)
1970-07-17
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