CN1143287A - 含集成高通滤波器的频率倒置扰频器 - Google Patents
含集成高通滤波器的频率倒置扰频器 Download PDFInfo
- Publication number
- CN1143287A CN1143287A CN95105174A CN95105174A CN1143287A CN 1143287 A CN1143287 A CN 1143287A CN 95105174 A CN95105174 A CN 95105174A CN 95105174 A CN95105174 A CN 95105174A CN 1143287 A CN1143287 A CN 1143287A
- Authority
- CN
- China
- Prior art keywords
- pass filter
- frequency
- input
- low pass
- output
- 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
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
- H04K1/00—Secret communication
- H04K1/04—Secret communication by frequency scrambling, i.e. by transposing or inverting parts of the frequency band or by inverting the whole band
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
- H04B7/26—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Telephone Function (AREA)
- Transmitters (AREA)
- Transceivers (AREA)
- Filters That Use Time-Delay Elements (AREA)
Abstract
Description
Claims (7)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US237,528 | 1994-05-03 | ||
US08/237,528 US5528692A (en) | 1994-05-03 | 1994-05-03 | Frequency inversion scrambler with integrated high-pass filter having autozero to remove internal DC offset |
Publications (2)
Publication Number | Publication Date |
---|---|
CN1143287A true CN1143287A (zh) | 1997-02-19 |
CN1084561C CN1084561C (zh) | 2002-05-08 |
Family
ID=22894113
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN95105174A Expired - Lifetime CN1084561C (zh) | 1994-05-03 | 1995-04-28 | 含集成高通滤波器的频率倒置扰频器 |
Country Status (5)
Country | Link |
---|---|
US (1) | US5528692A (zh) |
EP (1) | EP0681380A1 (zh) |
JP (1) | JP3626788B2 (zh) |
KR (1) | KR100350005B1 (zh) |
CN (1) | CN1084561C (zh) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102752068A (zh) * | 2011-04-22 | 2012-10-24 | 松下电器产业株式会社 | 通信系统、发送装置、接收装置以及通信方法 |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR0154793B1 (ko) * | 1995-10-19 | 1998-11-16 | 김광호 | 무선전화기의 비화회로 및 역비화회로 |
GB2330749B (en) * | 1997-10-24 | 2002-08-21 | Sony Uk Ltd | Audio signal processor |
GB2368492B (en) * | 2000-10-23 | 2004-02-18 | Nat Air Traffic Services Ltd | audio communications system with co-channel transmitters |
US6972620B2 (en) | 2004-02-19 | 2005-12-06 | Optical Communication Products, Inc. | Post amplifier array integrated circuit |
JP5331091B2 (ja) * | 2010-11-18 | 2013-10-30 | パナソニック株式会社 | 通信システム、送信装置、受信装置および通信方法 |
JP5350351B2 (ja) * | 2010-11-18 | 2013-11-27 | パナソニック株式会社 | 通信システム、送信装置、受信装置および通信方法 |
DE102016103995B4 (de) * | 2016-03-04 | 2018-03-01 | Infineon Technologies Ag | Spektral geformtes Zufallssignal |
WO2021157721A1 (ja) * | 2020-02-06 | 2021-08-12 | 株式会社小糸製作所 | 監視システム |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL6612935A (zh) * | 1966-09-14 | 1968-03-15 | ||
US3886313A (en) * | 1972-09-29 | 1975-05-27 | Datotek | Voice security method and system |
US4160875A (en) * | 1977-05-12 | 1979-07-10 | Kahn Leonard R | Security system |
US4195202A (en) * | 1978-01-03 | 1980-03-25 | Technical Communications Corporation | Voice privacy system with amplitude masking |
JPS6041830A (ja) * | 1983-08-18 | 1985-03-05 | Sony Corp | マ−カ−信号検出回路 |
JPS6128250A (ja) * | 1984-06-29 | 1986-02-07 | Nec Corp | 秘話通信装置 |
US4790009A (en) * | 1984-10-29 | 1988-12-06 | Victor Company Of Japan, Ltd. | Scrambler system |
GB2196816A (en) * | 1986-10-07 | 1988-05-05 | Plessey Co Plc | Communications link and method of increasing the security thereof |
JPS6424648A (en) * | 1987-07-21 | 1989-01-26 | Fujitsu Ltd | Privacy call equipment |
US4984219A (en) * | 1989-12-26 | 1991-01-08 | Motorola, Inc. | Method and apparatus for decoding of frequency inversion based scramblers |
JP2792242B2 (ja) * | 1991-02-01 | 1998-09-03 | 富士通株式会社 | 反転回路付きスクランブラ |
JPH06132937A (ja) * | 1992-10-16 | 1994-05-13 | Sony Corp | 周波数反転による音声スクランブラー |
-
1994
- 1994-05-03 US US08/237,528 patent/US5528692A/en not_active Expired - Lifetime
-
1995
- 1995-04-21 JP JP11907195A patent/JP3626788B2/ja not_active Expired - Lifetime
- 1995-04-27 EP EP95106320A patent/EP0681380A1/en not_active Withdrawn
- 1995-04-28 CN CN95105174A patent/CN1084561C/zh not_active Expired - Lifetime
- 1995-05-03 KR KR1019950010791A patent/KR100350005B1/ko not_active IP Right Cessation
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102752068A (zh) * | 2011-04-22 | 2012-10-24 | 松下电器产业株式会社 | 通信系统、发送装置、接收装置以及通信方法 |
CN102752068B (zh) * | 2011-04-22 | 2016-09-28 | 松下电器产业株式会社 | 通信系统、发送装置、接收装置以及通信方法 |
Also Published As
Publication number | Publication date |
---|---|
US5528692A (en) | 1996-06-18 |
EP0681380A1 (en) | 1995-11-08 |
JPH07307721A (ja) | 1995-11-21 |
KR950035151A (ko) | 1995-12-30 |
JP3626788B2 (ja) | 2005-03-09 |
KR100350005B1 (ko) | 2003-01-08 |
CN1084561C (zh) | 2002-05-08 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CA2273148C (en) | Telephone line coupler | |
US5978658A (en) | Portable analog communication device with selectable voice and data filters | |
CN1084561C (zh) | 含集成高通滤波器的频率倒置扰频器 | |
WO1993023938A1 (en) | Voice and data encryption device | |
AU7682196A (en) | Method and apparatus for implementing a computer network/internet telephone system | |
EP0930768A4 (en) | TELECOMMUNICATIONS TERMINAL | |
JPH04287523A (ja) | 電気通信ネットワークの音声信号品質の向上方法 | |
US20030091140A1 (en) | Digital access arrangment circuitry and method for connecting to phone lines having a DC holding circuit with switchable DC termination impedance | |
JPH09130315A (ja) | セルラ方式のデータのエコーをキャンセルする方法および装置 | |
TW264598B (zh) | ||
JP2005524321A (ja) | 電力線データ通信のための完全二重化 | |
CN105072241A (zh) | 一种对讲系统隔离变压器消侧音电路 | |
KR0154793B1 (ko) | 무선전화기의 비화회로 및 역비화회로 | |
JPH05122325A (ja) | 無線拡声電話装置 | |
US6674856B1 (en) | Placement of a transmit predistortion filter with respect to a data access arrangement | |
KR100357801B1 (ko) | 수신신호경로에서의측음감소회로 | |
EP0394012A1 (en) | Termination circuit for a two-wire transmission line | |
CN202111666U (zh) | 具有高频滤波功能的语音电路及移动终端 | |
US5872835A (en) | Data interface circuit for portable terminal equipment | |
US6373886B1 (en) | Power supply circuits for data access arrangement enabling modem operation over a private line | |
US6504864B1 (en) | Digital access arrangement circuitry and method for connecting to phone lines having a second order DC holding circuit | |
CN2319967Y (zh) | 自我干扰式防线路窃听的电话机 | |
KR970009699B1 (ko) | 휴대용 단말기의 유,무선 모델 인터페이스 장치 | |
JPS5923140B2 (ja) | Ac電力線搬送波増設電話システム | |
MXPA03005992A (es) | Adaptador de telefonia internet inalambrico. |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
C06 | Publication | ||
PB01 | Publication | ||
C14 | Grant of patent or utility model | ||
GR01 | Patent grant | ||
ASS | Succession or assignment of patent right |
Owner name: FREEDOM SEMICONDUCTORS CO. Free format text: FORMER OWNER: MOTOROLA, INC. Effective date: 20040820 |
|
C41 | Transfer of patent application or patent right or utility model | ||
TR01 | Transfer of patent right |
Effective date of registration: 20040820 Address after: Texas in the United States Patentee after: FreeScale Semiconductor Address before: Illinois Instrunment Patentee before: Motorola, Inc. |
|
C56 | Change in the name or address of the patentee |
Owner name: FISICAL SEMICONDUCTOR INC. Free format text: FORMER NAME: FREEDOM SEMICONDUCTOR CORP. |
|
CP01 | Change in the name or title of a patent holder |
Address after: Texas in the United States Patentee after: FREESCALE SEMICONDUCTOR, Inc. Address before: Texas in the United States Patentee before: FreeScale Semiconductor |
|
C17 | Cessation of patent right | ||
CX01 | Expiry of patent term |
Expiration termination date: 20150428 Granted publication date: 20020508 |