KR960009394A - Switched Capacitor Bandpass Filter for Detection of Broadcast Status Identification Signals - Google Patents
Switched Capacitor Bandpass Filter for Detection of Broadcast Status Identification Signals Download PDFInfo
- Publication number
- KR960009394A KR960009394A KR1019940019947A KR19940019947A KR960009394A KR 960009394 A KR960009394 A KR 960009394A KR 1019940019947 A KR1019940019947 A KR 1019940019947A KR 19940019947 A KR19940019947 A KR 19940019947A KR 960009394 A KR960009394 A KR 960009394A
- Authority
- KR
- South Korea
- Prior art keywords
- switched capacitor
- filter
- output signal
- bandpass filter
- inputting
- Prior art date
Links
- 239000003990 capacitor Substances 0.000 title claims abstract description 17
- 238000001514 detection method Methods 0.000 title claims 4
- 238000001914 filtration Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
- H03L7/00—Automatic control of frequency or phase; Synchronisation
- H03L7/06—Automatic control of frequency or phase; Synchronisation using a reference signal applied to a frequency- or phase-locked loop
- H03L7/08—Details of the phase-locked loop
- H03L7/099—Details of the phase-locked loop concerning mainly the controlled oscillator of the loop
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
- H03H7/01—Frequency selective two-port networks
- H03H7/12—Bandpass or bandstop filters with adjustable bandwidth and fixed centre frequency
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H17/00—Networks using digital techniques
- H03H17/02—Frequency selective networks
- H03H17/0248—Filters characterised by a particular frequency response or filtering method
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H19/00—Networks using time-varying elements, e.g. N-path filters
- H03H19/004—Switched capacitor networks
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
- H03J3/00—Continuous tuning
- H03J3/02—Details
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
- H03L7/00—Automatic control of frequency or phase; Synchronisation
- H03L7/06—Automatic control of frequency or phase; Synchronisation using a reference signal applied to a frequency- or phase-locked loop
- H03L7/08—Details of the phase-locked loop
- H03L7/0807—Details of the phase-locked loop concerning mainly a recovery circuit for the reference signal
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
- H03L7/00—Automatic control of frequency or phase; Synchronisation
- H03L7/06—Automatic control of frequency or phase; Synchronisation using a reference signal applied to a frequency- or phase-locked loop
- H03L7/08—Details of the phase-locked loop
- H03L7/10—Details of the phase-locked loop for assuring initial synchronisation or for broadening the capture range
- H03L7/107—Details of the phase-locked loop for assuring initial synchronisation or for broadening the capture range using a variable transfer function for the loop, e.g. low pass filter having a variable bandwidth
- H03L7/1075—Details of the phase-locked loop for assuring initial synchronisation or for broadening the capture range using a variable transfer function for the loop, e.g. low pass filter having a variable bandwidth by changing characteristics of the loop filter, e.g. changing the gain, changing the bandwidth
-
- 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
- H04B1/44—Transmit/receive switching
- H04B1/46—Transmit/receive switching by voice-frequency signals; by pilot signals
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Mathematical Physics (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
- Filters That Use Time-Delay Elements (AREA)
Abstract
본 발명은 스위치드 캐패시터 대역 통과 필터를 공개한다. 그 필터는 스위치드 캐패시터 필터, 상기 스위치드 패캐시터 필터의 출력신호를 입력하고 상기 스위치드 캐패시터 필터의 극점의 정수배가 되는 주파수를 가진 클럭신호를 상기 스위치드 캐패시터 필터의 클럭신호로 인가하기 위한 위상 동기 루프를 구비한 것을 특징으로 한다. 따라서, 외부 클럭을 필요로 하지 않고 자체 조정을 통해 고정 변수에 의한 에러를 제거할 수 있다.The present invention discloses a switched capacitor band pass filter. The filter has a phase locked loop for inputting a switched capacitor filter, an output signal of the switched capacitor filter, and applying a clock signal having a frequency that is an integer multiple of the pole of the switched capacitor filter to the clock signal of the switched capacitor filter. Characterized in that provided. Therefore, it is possible to eliminate errors caused by fixed variables through self-adjustment without requiring an external clock.
Description
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.
제2도는 본 발명의 스위치드 캐패시터 대역 통과 필터의 블럭도이다.2 is a block diagram of a switched capacitor band pass filter of the present invention.
Claims (4)
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019940019947A KR970001313B1 (en) | 1994-08-12 | 1994-08-12 | Switched capacitor filter |
DE19512858A DE19512858A1 (en) | 1994-08-12 | 1995-04-06 | Switched capacitor bandpass filter for pilot signal recognition |
CN95104023A CN1057176C (en) | 1994-08-12 | 1995-04-08 | Switched capacitor bandpass filter for detecting pilot signal |
JP7093907A JPH0879013A (en) | 1994-08-12 | 1995-04-19 | Switched capacitor band-pass filter for pilotsignal detection |
US08/699,610 US5774555A (en) | 1994-08-12 | 1996-08-19 | Switched capacitor bandpass filter for detecting pilot signal |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019940019947A KR970001313B1 (en) | 1994-08-12 | 1994-08-12 | Switched capacitor filter |
Publications (2)
Publication Number | Publication Date |
---|---|
KR960009394A true KR960009394A (en) | 1996-03-22 |
KR970001313B1 KR970001313B1 (en) | 1997-02-05 |
Family
ID=19390287
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1019940019947A KR970001313B1 (en) | 1994-08-12 | 1994-08-12 | Switched capacitor filter |
Country Status (4)
Country | Link |
---|---|
JP (1) | JPH0879013A (en) |
KR (1) | KR970001313B1 (en) |
CN (1) | CN1057176C (en) |
DE (1) | DE19512858A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100450658B1 (en) * | 1997-08-27 | 2004-11-16 | 삼성전자주식회사 | Apparatus and method for controlling switched capacitor filter, especially controlling switched capacitor filter by reference clock signal |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7403063B2 (en) * | 2005-11-23 | 2008-07-22 | Mediatek Inc. | Apparatus and method for tuning center frequency of a filter |
DE102006034581A1 (en) * | 2006-07-26 | 2008-01-31 | Infineon Technologies Ag | Filter device i.e. second order phase locked loop filter, has switched capacitor circuit arranged between input and output of operational amplifier, where capacitor circuit comprises capacitor and switching device |
CN102098044A (en) * | 2010-12-10 | 2011-06-15 | 青岛海信信芯科技有限公司 | Pixel phase lock clock frequency generating method and device |
JP5638419B2 (en) | 2011-02-25 | 2014-12-10 | セイコーエプソン株式会社 | Signal processing circuit, physical quantity detection device, angular velocity detection device, integrated circuit device, and electronic apparatus |
CN104935290B (en) * | 2015-07-01 | 2017-07-28 | 东南大学 | The SCF and preparation method of silicon substrate low-leakage current clamped beam grid |
CN111142058B (en) * | 2020-01-02 | 2022-05-17 | 联芸科技(杭州)有限公司 | Resistance detection device and method |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL8603249A (en) * | 1986-12-22 | 1988-07-18 | Philips Nv | Apparatus for decoding a stereo multiplex signal. |
US4932058A (en) * | 1989-08-14 | 1990-06-05 | Delco Electronics Corporation | Pilot cancellation circuit |
-
1994
- 1994-08-12 KR KR1019940019947A patent/KR970001313B1/en not_active IP Right Cessation
-
1995
- 1995-04-06 DE DE19512858A patent/DE19512858A1/en not_active Ceased
- 1995-04-08 CN CN95104023A patent/CN1057176C/en not_active Expired - Fee Related
- 1995-04-19 JP JP7093907A patent/JPH0879013A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100450658B1 (en) * | 1997-08-27 | 2004-11-16 | 삼성전자주식회사 | Apparatus and method for controlling switched capacitor filter, especially controlling switched capacitor filter by reference clock signal |
Also Published As
Publication number | Publication date |
---|---|
CN1057176C (en) | 2000-10-04 |
CN1117667A (en) | 1996-02-28 |
KR970001313B1 (en) | 1997-02-05 |
JPH0879013A (en) | 1996-03-22 |
DE19512858A1 (en) | 1996-02-15 |
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