CA2373270A1 - Transmitter tolerant to crystal variations - Google Patents
Transmitter tolerant to crystal variations Download PDFInfo
- Publication number
- CA2373270A1 CA2373270A1 CA002373270A CA2373270A CA2373270A1 CA 2373270 A1 CA2373270 A1 CA 2373270A1 CA 002373270 A CA002373270 A CA 002373270A CA 2373270 A CA2373270 A CA 2373270A CA 2373270 A1 CA2373270 A1 CA 2373270A1
- Authority
- CA
- Canada
- Prior art keywords
- transmitter
- tolerant
- coupled
- synthesizer
- crystal variations
- 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.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/0003—Software-defined radio [SDR] systems, i.e. systems wherein components typically implemented in hardware, e.g. filters or modulators/demodulators, are implented using software, e.g. by involving an AD or DA conversion stage such that at least part of the signal processing is performed in the digital domain
- H04B1/0007—Software-defined radio [SDR] systems, i.e. systems wherein components typically implemented in hardware, e.g. filters or modulators/demodulators, are implented using software, e.g. by involving an AD or DA conversion stage such that at least part of the signal processing is performed in the digital domain wherein the AD/DA conversion occurs at radiofrequency or intermediate frequency stage
- H04B1/0025—Software-defined radio [SDR] systems, i.e. systems wherein components typically implemented in hardware, e.g. filters or modulators/demodulators, are implented using software, e.g. by involving an AD or DA conversion stage such that at least part of the signal processing is performed in the digital domain wherein the AD/DA conversion occurs at radiofrequency or intermediate frequency stage using a sampling rate lower than twice the highest frequency component of the sampled signal
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/16—Circuits
- H04B1/26—Circuits for superheterodyne receivers
- H04B1/28—Circuits for superheterodyne receivers the receiver comprising at least one semiconductor device having three or more electrodes
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0041—Arrangements at the transmitter end
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/02—Channels characterised by the type of signal
- H04L5/06—Channels characterised by the type of signal the signals being represented by different frequencies
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q9/00—Arrangements in telecontrol or telemetry systems for selectively calling a substation from a main station, in which substation desired apparatus is selected for applying a control signal thereto or for obtaining measured values therefrom
- H04Q9/08—Calling by using continuous ac
- H04Q9/12—Calling by using continuous ac using combinations of frequencies
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q2209/00—Arrangements in telecontrol or telemetry systems
- H04Q2209/60—Arrangements in telecontrol or telemetry systems for transmitting utility meters data, i.e. transmission of data from the reader of the utility meter
Abstract
A transmitter (800) to transmit data from an end-point includes a reference oscillator (802); a low pass filter (804) coupled to the reference oscillator (802); a modulation filter (804) to provide an over-sampled modulated signal; a synthesizer (808) coupled to the low pass filter (804) and the modulation filter (806); and a sine wave generator (812) coupled to the synthesizer (808).
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/313,050 US6677862B1 (en) | 1999-05-17 | 1999-05-17 | Transmitter tolerant to crystal variations |
US09/313,050 | 1999-05-17 | ||
PCT/US2000/013947 WO2000070576A1 (en) | 1999-05-17 | 2000-05-17 | Transmitter tolerant to crystal variations |
Publications (2)
Publication Number | Publication Date |
---|---|
CA2373270A1 true CA2373270A1 (en) | 2000-11-23 |
CA2373270C CA2373270C (en) | 2009-10-06 |
Family
ID=23214160
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA002373270A Expired - Lifetime CA2373270C (en) | 1999-05-17 | 2000-05-17 | Transmitter tolerant to crystal variations |
Country Status (7)
Country | Link |
---|---|
US (1) | US6677862B1 (en) |
EP (1) | EP1183668A1 (en) |
AU (1) | AU775666B2 (en) |
BR (1) | BR0011298A (en) |
CA (1) | CA2373270C (en) |
MX (1) | MXPA01011746A (en) |
WO (1) | WO2000070576A1 (en) |
Families Citing this family (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0953845A1 (en) * | 1998-04-23 | 1999-11-03 | Electrowatt Technology Innovation AG | Method by which a central unit selects a secondary unit in a transmission system |
US6677862B1 (en) | 1999-05-17 | 2004-01-13 | Schlumbergersema Inc. | Transmitter tolerant to crystal variations |
US7231197B1 (en) * | 2000-10-27 | 2007-06-12 | Fisher Daniel E | Angle rate interferometer and passive ranger |
US7417557B2 (en) * | 2003-05-07 | 2008-08-26 | Itron, Inc. | Applications for a low cost receiver in an automatic meter reading system |
US7557729B2 (en) * | 2004-02-05 | 2009-07-07 | Ecologic Analytics, LLC | Method and system for validation, estimation and editing of daily meter read data |
US7283916B2 (en) * | 2004-07-02 | 2007-10-16 | Itron, Inc. | Distributed utility monitoring, such as for monitoring the quality or existence of a electrical, gas, or water utility |
US7002423B1 (en) | 2004-07-20 | 2006-02-21 | Pericom Semiconductor Corp. | Crystal clock generator operating at third overtone of crystal's fundamental frequency |
US7053725B1 (en) | 2004-10-25 | 2006-05-30 | Pericom Semiconductor Corp. | 4X crystal frequency multiplier with op amp buffer between 2X multiplier stages |
US7830874B2 (en) * | 2006-02-03 | 2010-11-09 | Itron, Inc. | Versatile radio packeting for automatic meter reading systems |
US20070183369A1 (en) * | 2006-02-03 | 2007-08-09 | Bruce Angelis | System for verifying restored outages, such as in the field outage restoration of public utilities using automatic meter reading (AMR) |
US20070183318A1 (en) * | 2006-02-03 | 2007-08-09 | Matthew Johnson | Outage notification, such as fixed network positive outage notification |
JP4206109B2 (en) * | 2006-07-31 | 2009-01-07 | 東芝テック株式会社 | Wireless tag reader |
US7961554B2 (en) * | 2008-01-11 | 2011-06-14 | Cellnet Innovations, Inc. | Methods and systems for accurate time-keeping on metering and other network communication devices |
US20100265095A1 (en) * | 2009-04-20 | 2010-10-21 | Itron, Inc. | Endpoint classification and command processing |
US8436744B2 (en) * | 2009-01-29 | 2013-05-07 | Itron, Inc. | Prioritized collection of meter readings |
US9660855B2 (en) * | 2012-06-29 | 2017-05-23 | Cable Television Laboratories, Inc. | Orthogonal signal demodulation |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4484354A (en) | 1980-10-16 | 1984-11-20 | Motorola, Inc. | Continuous tone decoder/encoder |
US4477809A (en) | 1982-06-18 | 1984-10-16 | General Electric Company | Method for random-access radio-frequency data communications |
US5179569A (en) | 1985-07-19 | 1993-01-12 | Clinicom, Incorporated | Spread spectrum radio communication system |
JPH02172338A (en) | 1988-12-26 | 1990-07-03 | G D S:Kk | Continuous chirp modulation system spread spectrum communication equipment |
US4977612A (en) | 1989-10-10 | 1990-12-11 | Motorola, Inc. | Channel selection in a multi-frequency radio data communication system |
US5553094A (en) | 1990-02-15 | 1996-09-03 | Iris Systems, Inc. | Radio communication network for remote data generating stations |
US5604768A (en) | 1992-01-09 | 1997-02-18 | Cellnet Data Systems, Inc. | Frequency synchronized bidirectional radio system |
US5313173A (en) | 1993-04-26 | 1994-05-17 | Ericsson Ge Mobile Communications Inc. | Quadrature modulated phase-locked loop |
GB9312836D0 (en) | 1993-06-22 | 1993-08-04 | Schlumberger Ind Ltd | Multipoint to point radiocommunications network |
US5617084A (en) | 1993-09-10 | 1997-04-01 | Sears; Lawrence M. | Apparatus for communicating utility usage-related information from a utility usage location to a utility usage registering device |
US5768693A (en) | 1995-02-28 | 1998-06-16 | Telecommunications Equipment Corporation | Method and apparatus for controlling frequency of a multi-channel transmitter |
US5852636A (en) | 1997-08-08 | 1998-12-22 | Serge Mathieu | Method of and apparatus for modulation of FSK carrier in a very narrow band |
US6163276A (en) * | 1999-05-17 | 2000-12-19 | Cellnet Data Systems, Inc. | System for remote data collection |
US6677862B1 (en) | 1999-05-17 | 2004-01-13 | Schlumbergersema Inc. | Transmitter tolerant to crystal variations |
-
1999
- 1999-05-17 US US09/313,050 patent/US6677862B1/en not_active Expired - Lifetime
-
2000
- 2000-05-17 AU AU50357/00A patent/AU775666B2/en not_active Expired
- 2000-05-17 BR BR0011298-4A patent/BR0011298A/en not_active IP Right Cessation
- 2000-05-17 MX MXPA01011746A patent/MXPA01011746A/en active IP Right Grant
- 2000-05-17 WO PCT/US2000/013947 patent/WO2000070576A1/en active IP Right Grant
- 2000-05-17 CA CA002373270A patent/CA2373270C/en not_active Expired - Lifetime
- 2000-05-17 EP EP00932666A patent/EP1183668A1/en not_active Withdrawn
Also Published As
Publication number | Publication date |
---|---|
CA2373270C (en) | 2009-10-06 |
EP1183668A1 (en) | 2002-03-06 |
MXPA01011746A (en) | 2003-09-04 |
WO2000070576A1 (en) | 2000-11-23 |
US6677862B1 (en) | 2004-01-13 |
AU5035700A (en) | 2000-12-05 |
AU775666B2 (en) | 2004-08-12 |
BR0011298A (en) | 2002-05-28 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
EEER | Examination request | ||
MKEX | Expiry |
Effective date: 20200517 |