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 PDF

Info

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
Application number
KR1019940019947A
Other languages
Korean (ko)
Other versions
KR970001313B1 (en
Inventor
이정인
김양균
Original Assignee
김광호
삼성전자 주식회사
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.)
Filing date
Publication date
Application filed by 김광호, 삼성전자 주식회사 filed Critical 김광호
Priority to KR1019940019947A priority Critical patent/KR970001313B1/en
Priority to DE19512858A priority patent/DE19512858A1/en
Priority to CN95104023A priority patent/CN1057176C/en
Priority to JP7093907A priority patent/JPH0879013A/en
Publication of KR960009394A publication Critical patent/KR960009394A/en
Priority to US08/699,610 priority patent/US5774555A/en
Application granted granted Critical
Publication of KR970001313B1 publication Critical patent/KR970001313B1/en

Links

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

방송상태 식별신호 검출용 스위치드 캐패시터 대역 통과 필터Switched Capacitor Bandpass Filter for Detection of Broadcast Status Identification Signals

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)

스위치드 캐패시터 필터; 및 상기 스위치드 캐패시터 필터의 출력신호를 입력하고 상기 스위치드 캐패시터 필터의 극점의 정수배가 되는 주파수를 가진 클럭신호를 상기 스위치드 캐패시터 필터의 클럭신호로 인가하기 위한 위상 동기 루르를 구비한 것을 특징으로 하는 스위치드 캐패시터 대역 통과 필터.Switched capacitor filters; And a phase locked loop for inputting 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 as a clock signal of the switched capacitor filter. Bandpass filter. 제1항에 있어서, 상기 위상 동기 루프는 상기 스위치드 캐패시터 필터의 출력신호를 입력하여 위상을 검출하기 위한 위상 검출수단, 상기 위상 검출수단의 출력신호를 저역 통과 필터링하기 위한 저역 통과 필터, 상기 저역 통과 필터의 출력신호에 응답하여 주파수를 가변하기 위한 전압 제어 발진기, 상기 전압 제어 발진기의 출력신호를 입력하여 1/N배로 분주하여 상기 위상 검출수단으로 인가하기 위한 1/N분주기를 구비한 것을 특징으로 하는 스위치드 캐패시터 대역 통과 필터.2. The apparatus of claim 1, wherein the phase locked loop comprises: phase detection means for detecting a phase by inputting an output signal of the switched capacitor filter, a low pass filter for low pass filtering the output signal of the phase detection means, and the low pass And a voltage controlled oscillator for varying the frequency in response to the output signal of the filter, and a 1 / N divider for inputting the output signal of the voltage controlled oscillator and dividing by 1 / N times to apply to the phase detection means. Switched capacitor bandpass filter. 제1항에 있어서, 상기 스위치드 캐패시터 필터는 한정된 주파수대역내의 여러개의 신호 중 가장 큰 신호를 검출하는 것을 특징으로 하는 스위치드 캐패시터 대역 통과 필터.2. The switched capacitor band pass filter of claim 1, wherein the switched capacitor filter detects the largest signal among a plurality of signals in a limited frequency band. 제1항에 있어서, 상기 스위치드 캐패시터 필터는 한정된 주파수 대역내의 여러개의 신호 중 가장 먼저 입력되는 신호를 검출하는 것을 특징으로 하는 스위치드 캐패시터 대역 통과 필터.2. The switched capacitor band pass filter of claim 1, wherein the switched capacitor filter detects a first input signal among a plurality of signals within a limited frequency band. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019940019947A 1994-08-12 1994-08-12 Switched capacitor filter KR970001313B1 (en)

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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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

Cited By (1)

* Cited by examiner, † Cited by third party
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

Similar Documents

Publication Publication Date Title
KR880008487A (en) Clock Control System and Method for Parallel Variable Constant Frequency Power System
KR880700533A (en) Method and apparatus for changing frequency modulated signal to low frequency via at least one intermediate frequency
KR960009394A (en) Switched Capacitor Bandpass Filter for Detection of Broadcast Status Identification Signals
KR850008258A (en) FSK data receiver
DE69407529D1 (en) Device for monitoring the phase shift between two clock signals
KR890015178A (en) Curing Discriminator
KR880002388A (en) Voice intermediate frequency signal detector
GB1490225A (en) Notch rejection filter circuit
KR830004009A (en) Switched Television Horizontal Oscillator Frequency-Controlled Loop with Offset Voltage
KR930003770A (en) Signal generator
ES2045046T3 (en) PROCEDURE AND ARRANGEMENT OF THE CIRCUIT FOR THE DETERMINATION OF THE PRESENCE OR ABSENCE OF AT LEAST ONE FREQUENCY OF KNOWN VALUE IN A SIGNAL OF ENTRY COMPOSED OF SEVERAL FREQUENCIES.
KR920001314A (en) Wide operating range automatic device for changing the horizontal deflection frequency of multi-sync monitor
DE69431936D1 (en) Method and device for clock control
KR930008444A (en) Knocking circuit
KR890016746A (en) Oscillator Synchronization Circuit
KR970031227A (en) Frequency synthesizer
KR940018670A (en) Variable filtering device of receiver
KR950013026A (en) Chopper Stabilized Switched Capacitor Filter
SU1555899A1 (en) Device for synchronous detection of phase-manipulated signals
SU451988A1 (en) Pneumatic pulse generator
KR950030478A (en) Bandpass Filter Apparatus Using Phase-Locked Loop and its Filtering Method
SE9200821D0 (en) SETTING AND DEVICE TO COMPARE THE PHASES OF BINARY SIGNALS
JPS5673369A (en) Phase comparison system of decca receiving device
KR960012733A (en) Phase locked loop
JPS55103089A (en) Synchronizing circuit

Legal Events

Date Code Title Description
A201 Request for examination
E902 Notification of reason for refusal
G160 Decision to publish patent application
E701 Decision to grant or registration of patent right
GRNT Written decision to grant
FPAY Annual fee payment

Payment date: 20060105

Year of fee payment: 10

LAPS Lapse due to unpaid annual fee