CN1511380A - 微弱信号抽出电路 - Google Patents
微弱信号抽出电路 Download PDFInfo
- Publication number
- CN1511380A CN1511380A CNA028105214A CN02810521A CN1511380A CN 1511380 A CN1511380 A CN 1511380A CN A028105214 A CNA028105214 A CN A028105214A CN 02810521 A CN02810521 A CN 02810521A CN 1511380 A CN1511380 A CN 1511380A
- Authority
- CN
- China
- Prior art keywords
- signal
- small
- pilot signal
- voltage
- extracting circuit
- 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.)
- Pending
Links
Images
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
- H04B1/06—Receivers
- H04B1/16—Circuits
- H04B1/1646—Circuits adapted for the reception of stereophonic signals
- H04B1/1653—Detection of the presence of stereo signals and pilot signal regeneration
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Stereo-Broadcasting Methods (AREA)
- Circuits Of Receivers In General (AREA)
Abstract
Description
Claims (7)
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2001224894A JP4455785B2 (ja) | 2001-07-25 | 2001-07-25 | パイロット信号抽出回路 |
JP224894/2001 | 2001-07-25 | ||
JP2001225860A JP2003037511A (ja) | 2001-07-26 | 2001-07-26 | 微弱信号抽出回路 |
JP225860/2001 | 2001-07-26 |
Publications (1)
Publication Number | Publication Date |
---|---|
CN1511380A true CN1511380A (zh) | 2004-07-07 |
Family
ID=26619252
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CNA028105214A Pending CN1511380A (zh) | 2001-07-25 | 2002-06-26 | 微弱信号抽出电路 |
Country Status (4)
Country | Link |
---|---|
US (1) | US20050074075A1 (zh) |
CN (1) | CN1511380A (zh) |
TW (1) | TW556418B (zh) |
WO (1) | WO2003010894A1 (zh) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8144878B2 (en) * | 2006-03-06 | 2012-03-27 | Mediatek Inc. | FM receiver and pilot detector thereof, and method for determining a type of a processed signal |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2245189C3 (de) * | 1971-09-18 | 1980-09-25 | Fujitsu Ltd., Kawasaki, Kanagawa (Japan) | Vorrichtung zur Übertragung eines restseitenbandträgermodulierten Mehrpegelsignals und eines Synchronisier-Pilotsignals |
JPS52115101A (en) * | 1976-03-23 | 1977-09-27 | Sharp Corp | Fm receiver |
JPS52144633U (zh) * | 1976-04-26 | 1977-11-02 | ||
JPS5754327Y2 (zh) * | 1977-03-12 | 1982-11-25 | ||
JPS5333502A (en) * | 1977-09-19 | 1978-03-29 | Torio Kk | Device for automatically switching between stereo and monaural in fm receiver |
JPS57121345A (en) * | 1981-01-20 | 1982-07-28 | Sanyo Electric Co Ltd | Pulse noise eliminating circuit |
US4441199A (en) * | 1982-06-24 | 1984-04-03 | Chester John K | Method and apparatus for amplitude limiting a composite signal |
JPH01190109A (ja) * | 1988-01-26 | 1989-07-31 | Nec Corp | フィルタ装置 |
JP3356442B2 (ja) * | 1991-06-04 | 2002-12-16 | 株式会社東芝 | データ記録再生装置 |
JPH06140954A (ja) * | 1992-10-28 | 1994-05-20 | Fujitsu Ten Ltd | 特定情報受信用fm放送受信機 |
JP3213495B2 (ja) * | 1994-11-30 | 2001-10-02 | 三洋電機株式会社 | ノイズ除去回路 |
US5748752A (en) * | 1994-12-23 | 1998-05-05 | Reames; James B. | Adaptive voice enhancing system |
-
2002
- 2002-06-26 US US10/482,013 patent/US20050074075A1/en not_active Abandoned
- 2002-06-26 WO PCT/JP2002/006401 patent/WO2003010894A1/ja active Application Filing
- 2002-06-26 CN CNA028105214A patent/CN1511380A/zh active Pending
- 2002-07-24 TW TW091116466A patent/TW556418B/zh not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
TW556418B (en) | 2003-10-01 |
US20050074075A1 (en) | 2005-04-07 |
WO2003010894A1 (fr) | 2003-02-06 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
C06 | Publication | ||
PB01 | Publication | ||
C10 | Entry into substantive examination | ||
SE01 | Entry into force of request for substantive examination | ||
ASS | Succession or assignment of patent right |
Owner name: NIIGATA SEIMITSU CO., LTD.; APPLICANT Free format text: FORMER OWNER: NIIGATA SEIMITSU CO., LTD. Effective date: 20070817 |
|
C41 | Transfer of patent application or patent right or utility model | ||
TA01 | Transfer of patent application right |
Effective date of registration: 20070817 Address after: Niigata Prefecture, Japan Applicant after: Niigato Precision Co., Ltd. Co-applicant after: Ricoh Co., Ltd. Address before: Niigata Prefecture, Japan Applicant before: Niigato Precision Co., Ltd. |
|
C12 | Rejection of a patent application after its publication | ||
RJ01 | Rejection of invention patent application after publication |