KR100473164B1 - Tracking Filter Using Power Detector - Google Patents

Tracking Filter Using Power Detector Download PDF

Info

Publication number
KR100473164B1
KR100473164B1 KR10-2002-0062665A KR20020062665A KR100473164B1 KR 100473164 B1 KR100473164 B1 KR 100473164B1 KR 20020062665 A KR20020062665 A KR 20020062665A KR 100473164 B1 KR100473164 B1 KR 100473164B1
Authority
KR
South Korea
Prior art keywords
power detector
filter
amplifier
combiner
tracking filter
Prior art date
Application number
KR10-2002-0062665A
Other languages
Korean (ko)
Other versions
KR20040033535A (en
Inventor
김옥현
Original Assignee
주식회사 팬택
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 주식회사 팬택 filed Critical 주식회사 팬택
Priority to KR10-2002-0062665A priority Critical patent/KR100473164B1/en
Publication of KR20040033535A publication Critical patent/KR20040033535A/en
Application granted granted Critical
Publication of KR100473164B1 publication Critical patent/KR100473164B1/en

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H17/00—Networks using digital techniques
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H11/00—Networks using active elements
    • H03H11/02—Multiple-port networks
    • H03H11/04—Frequency selective two-port networks
    • H03H11/12—Frequency selective two-port networks using amplifiers with feedback
    • H03H11/1291—Current or voltage controlled filters
    • 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
    • H03H17/0251—Comb filters
    • 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
    • H03H17/0255—Filters based on statistics
    • H03H17/0257—KALMAN filters

Landscapes

  • Amplifiers (AREA)
  • Networks Using Active Elements (AREA)
  • Filters And Equalizers (AREA)

Abstract

본 발명은 파워 검출기를 이용한 트랙킹 필터에 관한 것으로, 특히 선택된 채널에 따라 중심주파수가 동조되는 대역폭이 작은 밴드패스필터를 사용하여 증폭기에서 출력된 신호에서 발생하는 고조파 신호의 감쇠 특성을 향상시키도록 한 파워 검출기를 이용한 트랙킹 필터에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tracking filter using a power detector. In particular, a bandpass filter having a small bandwidth in which a center frequency is tuned according to a selected channel is used to improve attenuation characteristics of harmonic signals generated from a signal output from an amplifier. A tracking filter using a power detector.

본 발명의 실시예에 따른 파워 검출기를 이용한 트랙킹 필터는 입력 신호를 소정의 레벨로 증폭하여 출력하는 증폭기와; 상기 증폭기로부터 출력된 신호를 분리하는 결합기와; 상기 결합기로부터 분리된 신호를 직류 전압으로 변환하는 파워 검출기와; 상기 파워 검출기에서 변환된 신호를 일정 대역으로 필터링하는 밴드패스필터부를 포함하여 이루어진 것을 특징으로 한다.A tracking filter using a power detector according to an embodiment of the present invention includes an amplifier for amplifying and outputting an input signal to a predetermined level; A combiner for separating the signal output from the amplifier; A power detector for converting the signal separated from the combiner into a direct current voltage; And a band pass filter configured to filter the signal converted by the power detector into a predetermined band.

Description

파워 검출기를 이용한 트랙킹 필터{Tracking Filter Using Power Detector}Tracking Filter Using Power Detector

본 발명은 파워 검출기를 이용한 트랙킹 필터에 관한 것으로, 특히 선택된 채널에 따라 중심주파수가 동조되는 대역폭이 작은 밴드패스필터를 사용하여 증폭기에서 출력된 신호에서 발생하는 고조파 신호의 감쇠 특성을 향상시키도록 한 파워 검출기를 이용한 트랙킹 필터에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tracking filter using a power detector. In particular, a bandpass filter having a small bandwidth in which a center frequency is tuned according to a selected channel is used to improve attenuation characteristics of harmonic signals generated from a signal output from an amplifier. A tracking filter using a power detector.

종래에는 파워 검출기를 사용할 경우, 다양한 주파수를 필터링하기 어렵기 때문에 고조파 감쇠 특성이 발생했었다.In the related art, harmonic attenuation has occurred because it is difficult to filter various frequencies when using a power detector.

본 발명은 전술한 바와 같은 제반적인 문제점을 해결하기 위한 것으로, 그 목적은 상용화되고 있는 디지털 제어에 의해 주파수 변환이 가능한 트랙킹 필터를 이용하여 하나의 필터로 모든 필요한 주파수 범위를 선택할 수 있을 뿐만 아니라, 선택된 채널에 따라 중심주파수가 동조되는 대역폭이 매우 작은 밴드패스필터를 사용하여 고조파 감쇠 특성을 향상시키는데 있다. The present invention has been made to solve the above-mentioned general problems, and the object thereof is not only to select all necessary frequency ranges with one filter by using a tracking filter capable of frequency conversion by commercially available digital control, It is to improve the harmonic attenuation characteristics by using a bandpass filter with a very small bandwidth where the center frequency is tuned according to the selected channel.

상기한 바와 같은 목적을 달성하기 위한 본 발명의 실시예에 따른 파워 검출기를 이용한 트랙킹 필터는 입력 신호를 소정의 레벨로 증폭하여 출력하는 증폭기와; 상기 증폭기로부터 출력된 신호를 분리하는 결합기와; 상기 결합기로부터 분리된 신호를 직류 전압으로 변환하는 파워 검출기와; 상기 파워 검출기에서 변환된 신호를 일정 대역으로 필터링하는 밴드패스필터부를 포함하여 이루어진 것을 특징으로 한다.A tracking filter using a power detector according to an embodiment of the present invention for achieving the above object includes an amplifier for amplifying and outputting an input signal to a predetermined level; A combiner for separating the signal output from the amplifier; A power detector for converting the signal separated from the combiner into a direct current voltage; And a band pass filter configured to filter the signal converted by the power detector into a predetermined band.

여기서, 상기 밴드패스필터부는 선택된 주파수가 동조될 때까지 상기 파워 검출기로부터 인가된 직류 전압에 따라 정전 용량을 가변시키는 용량성 저장 수단을 더 포함하여 이루어진 것을 특징으로 한다.The band pass filter unit may further include capacitive storage means for varying the capacitance according to the DC voltage applied from the power detector until the selected frequency is tuned.

이하, 본 발명의 실시예를 첨부한 도면을 참조하여 상세하게 설명하면 다음과 같다.Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

본 발명의 실시예에 따른 파워 검출기를 이용한 트랙킹 필터는 도1에 도시된 바와 같이, 증폭기(10)와, 결합기와(20), 파워 검출기(30)와, 밴드패스필터부(40)를 구비하여 이루어져 있다.The tracking filter using the power detector according to the embodiment of the present invention, as shown in FIG. 1, includes an amplifier 10, a combiner 20, a power detector 30, and a band pass filter unit 40. It consists of

해당 증폭기(10)는 입력되는 신호를 소정의 레벨로 증폭하여 출력한다.The amplifier 10 amplifies and outputs the input signal to a predetermined level.

해당 결합기(20)는 증폭기(10)로부터 증폭된 신호를 분리·결합한다.The combiner 20 separates and combines the signal amplified from the amplifier 10.

해당 파워 검출기(30)는 결합기(20)로부터 분리된 신호를 직류 전압으로 변환한다. 이때, 직류 전압은 R1(저항 1)을 통해 D1으로 인가된다.The power detector 30 converts the signal separated from the combiner 20 into a DC voltage. At this time, the DC voltage is applied to D1 through R1 (resistance 1).

해당 밴드패스필터부(40)는 파워 검출기(30)에서 변환된 신호를 인가받아 일정 대역으로 필터링하는 역할을 담당한다.The band pass filter 40 receives a signal converted by the power detector 30 and performs a role of filtering a predetermined band.

해당 밴드패스필터부(40)에는 도면에 도시된 바와 같이, D1(다이오드 1)과 L1(인덕터 1)을 구비하여 이루어지는데, 해당 D1은 가변 용량성 다이오드로, 인가된 전압에 따라 정전 용량을 가변시키는 용량성 저장 수단이다. As shown in the figure, the band pass filter unit 40 includes D1 (diode 1) and L1 (inductor 1). The D1 is a variable capacitive diode, and the capacitance is changed according to an applied voltage. Variable capacitive storage means.

그리고, L1에 낮은 값을 갖도록 하고, 밴드패스필터부(40)의 대역폭(BandWidth)을 매우 작게 가지도록 설계하여, 선택된 채널 주파수에 동조되도록 한다.And, it is designed to have a low value in L1, and to have a very small bandwidth (BandWidth) of the band pass filter unit 40, so that it is tuned to the selected channel frequency.

따라서, 중심 주파수가 선택된 채널 주파수에 동조될 때까지 정전 용량의 값은 증폭기(10)에서 인가된 전압에 비례하여 변화된다. 따라서, 인가된 전압이 최대가 되도록 중심주파수가 동조된다.Thus, the value of the capacitance changes in proportion to the voltage applied by the amplifier 10 until the center frequency is tuned to the selected channel frequency. Thus, the center frequency is tuned so that the applied voltage is maximum.

이상으로 본 발명의 바람직한 실시예에 대해 상세히 기술되었지만, 본 발명이 속하는 기술 분야에 있어서 통상의 지식을 가진 사람이라면, 본 발명을 여러 가지로 변형 또는 변경하여 실시할 수 있음을 알 수 있을 것이다. 따라서, 본 발명의 실시예들의 변경은 본 발명의 기술적 범위를 벗어날 수 없을 것이다.Although the preferred embodiments of the present invention have been described in detail above, it will be understood by those skilled in the art that the present invention may be modified or modified in various ways. Therefore, changes of the embodiments of the present invention will not be able to escape the technical scope of the present invention.

이상에서 설명한 바와 같이 본 발명은 선택된 채널에 따라 중심주파수가 동조되는 대역폭이 매우 작은 밴드패스필터를 사용하여 고조파 신호의 감쇠 특성을 향상시키는 효과가 있다. As described above, the present invention has an effect of improving attenuation characteristics of harmonic signals by using a bandpass filter having a very small bandwidth in which the center frequency is tuned according to the selected channel.

그리고, 채널이 바뀌어도 항상 최대 파워가 출력되도록 채널을 트랙킹(tracking)할 수 있다.And, even if the channel changes, the channel can be tracked so that the maximum power is always output.

또한, 트랙킹 필터를 이용하여 하나의 필터로 모든 필요한 주파수 범위를 선택할 수 있는 효과가 있다.In addition, the tracking filter has the effect of selecting all the required frequency ranges with one filter.

삭제delete

도1은 본 발명에 의한 파워 검출기를 이용한 트랙킹 필터를 나타낸 도.1 shows a tracking filter using a power detector according to the present invention.

*도면의 주요 부분에 대한 부호의 설명** Description of the symbols for the main parts of the drawings *

10 : 증폭기10: amplifier

20 : 결합기20: combiner

30 : 파워 검출기30: power detector

40 : 밴드패스필터부40: band pass filter unit

Claims (2)

입력 신호를 소정의 레벨로 증폭하여 출력하는 증폭기와;An amplifier for amplifying and outputting an input signal to a predetermined level; 상기 증폭기로부터 출력된 신호를 분리하는 결합기와;A combiner for separating the signal output from the amplifier; 상기 결합기로부터 분리된 신호를 직류 전압으로 변환하는 파워 검출기와;A power detector for converting the signal separated from the combiner into a direct current voltage; 상기 파워 검출기로부터 인가된 직류 전압에 따라 선택된 주파수가 동조될 때까지 정전 용량이 비례 증가하는 가변용량 다이오드를 포함하여, 상기 선택된 주파수 대역으로 필터링하는 밴드패스필터부를 포함하여 이루어진 것을 특징으로 하는 파워 검출기를 이용한 트랙킹 필터.And a band pass filter configured to filter the selected frequency band by including a variable capacitance diode whose capacitance increases proportionally until the selected frequency is tuned according to the DC voltage applied from the power detector. Tracking filter using. 삭제delete
KR10-2002-0062665A 2002-10-15 2002-10-15 Tracking Filter Using Power Detector KR100473164B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR10-2002-0062665A KR100473164B1 (en) 2002-10-15 2002-10-15 Tracking Filter Using Power Detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR10-2002-0062665A KR100473164B1 (en) 2002-10-15 2002-10-15 Tracking Filter Using Power Detector

Publications (2)

Publication Number Publication Date
KR20040033535A KR20040033535A (en) 2004-04-28
KR100473164B1 true KR100473164B1 (en) 2005-03-10

Family

ID=37332958

Family Applications (1)

Application Number Title Priority Date Filing Date
KR10-2002-0062665A KR100473164B1 (en) 2002-10-15 2002-10-15 Tracking Filter Using Power Detector

Country Status (1)

Country Link
KR (1) KR100473164B1 (en)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03143009A (en) * 1989-10-27 1991-06-18 Nec Corp Control circuit for electric tuning type band pass filter
JPH04154309A (en) * 1990-10-18 1992-05-27 Victor Co Of Japan Ltd Phase tracking type fm demodulating circuit
JPH04154201A (en) * 1990-10-17 1992-05-27 Victor Co Of Japan Ltd Phase tracking type fm demodulating circuit
JPH05333141A (en) * 1991-06-24 1993-12-17 Harutaka Hirozawa Highly sensitive search signal detecting radar system
US6212367B1 (en) * 1996-09-27 2001-04-03 Nec Corporation Mobile telephone apparatus with tunable filter tuned to the transmit band
JP2001136081A (en) * 1999-11-05 2001-05-18 Mitsubishi Electric Corp Level detector
JP2002164805A (en) * 2000-10-06 2002-06-07 Zarlink Semiconductor Ltd Tuner
KR20020062390A (en) * 2001-01-20 2002-07-26 한국과학기술연구원 A Digital Programable Tracking Filter With USB Protocol

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03143009A (en) * 1989-10-27 1991-06-18 Nec Corp Control circuit for electric tuning type band pass filter
JPH04154201A (en) * 1990-10-17 1992-05-27 Victor Co Of Japan Ltd Phase tracking type fm demodulating circuit
JPH04154309A (en) * 1990-10-18 1992-05-27 Victor Co Of Japan Ltd Phase tracking type fm demodulating circuit
JPH05333141A (en) * 1991-06-24 1993-12-17 Harutaka Hirozawa Highly sensitive search signal detecting radar system
US6212367B1 (en) * 1996-09-27 2001-04-03 Nec Corporation Mobile telephone apparatus with tunable filter tuned to the transmit band
JP2001136081A (en) * 1999-11-05 2001-05-18 Mitsubishi Electric Corp Level detector
JP2002164805A (en) * 2000-10-06 2002-06-07 Zarlink Semiconductor Ltd Tuner
KR20020062390A (en) * 2001-01-20 2002-07-26 한국과학기술연구원 A Digital Programable Tracking Filter With USB Protocol

Also Published As

Publication number Publication date
KR20040033535A (en) 2004-04-28

Similar Documents

Publication Publication Date Title
JP4497470B2 (en) High frequency power amplifier and transmitter
KR950004747B1 (en) Agc circuit of fm front-end
WO2021147743A1 (en) Receiver circuits with blocker attenuating rf filter
TW331681B (en) Wide-band low-noise low-crossover distortion receiver
US20110043279A1 (en) Electronic volume circuit
KR100554066B1 (en) A pulse width modulation type audio amplifier having variable average switching frequency
JP2006340166A (en) Distortion compensation amplifier
RU94046427A (en) PARALLEL OPERATIONAL OUTPUT
KR100473164B1 (en) Tracking Filter Using Power Detector
WO2011104804A1 (en) Signal processing circuit, wireless communication device, and signal processing method
JP2011087034A (en) Receiving circuit, and semiconductor device
TW200514444A (en) Data slicer circuit, integrate circuit and data detection method
KR102004803B1 (en) Envelope tracking bias circuit
KR20060041033A (en) Digital audio amplifier, audio system including the same, and method of amplifying an audio signal
US10483914B2 (en) Very high fidelity audio amplifier
CN105939503B (en) Multi-mode microphone
US20040122544A1 (en) Delta-sigma modulator, method of switching delta-sigma modulator, and digital amplifier
JP2005039568A (en) Amplifier circuit with signal detecting function
RU2726028C1 (en) Method for reducing threshold of sensitivity (intrinsic noise) of first time derivative measuring devices from magnetic induction
KR100360117B1 (en) Circuit for stabilizing power supply of low noise blockdown converter
SU690613A1 (en) Controllable filter
JP6901936B2 (en) Amplifiers, radios and harmonic processing methods
US6658120B2 (en) Polarity-independent transmission system
SU1548851A1 (en) Device for suppression of interface with angular modulation
JPS6041903B2 (en) optical receiver amplifier

Legal Events

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

Payment date: 20130205

Year of fee payment: 9

FPAY Annual fee payment

Payment date: 20140128

Year of fee payment: 10

LAPS Lapse due to unpaid annual fee