KR100264836B1 - Temperature correcting method using up-down converter - Google Patents

Temperature correcting method using up-down converter Download PDF

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Publication number
KR100264836B1
KR100264836B1 KR1019950058513A KR19950058513A KR100264836B1 KR 100264836 B1 KR100264836 B1 KR 100264836B1 KR 1019950058513 A KR1019950058513 A KR 1019950058513A KR 19950058513 A KR19950058513 A KR 19950058513A KR 100264836 B1 KR100264836 B1 KR 100264836B1
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South Korea
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oscillator
filter
frequency
output
amplifier
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KR1019950058513A
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Korean (ko)
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KR970055765A (en
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문웅한
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이형도
삼성전기주식회사
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    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
    • H03B5/00—Generation of oscillations using amplifier with regenerative feedback from output to input
    • H03B5/02—Details
    • H03B5/04—Modifications of generator to compensate for variations in physical values, e.g. power supply, load, temperature
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
    • H03B5/00—Generation of oscillations using amplifier with regenerative feedback from output to input
    • H03B5/30—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element being electromechanical resonator
    • H03B5/32—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element being electromechanical resonator being a piezoelectric resonator

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  • Oscillators With Electromechanical Resonators (AREA)
  • Superheterodyne Receivers (AREA)

Abstract

PURPOSE: A method for compensating an oscillator temperature by using an up-down converter is provided to use the up-down converter to an RF(Radio Frequency) receiver of a double conversion. CONSTITUTION: An up-converter method£An IF(Intermediate Frequency) equals an oscillator frequency minus an RF(Radio Frequency)|is used. According as frequencies of the first oscillator and the second oscillator are increased by temperature, a frequency of the first IF filter is ascended, and the second oscillator is ascended as much as an increased amount, then a last IF is a stable 455MHz. By the up-converter method, an output of the first IF filer including the first oscillator is implemented. By a down-converter method, an output of the second IF filter including the second oscillator is implemented.

Description

업-다운 변환기를 이용한 발진기의 온도보정방법Temperature Compensation Method of Oscillator Using Up-Down Converter

제1도는 전형적인 전자동조튜너의 회로 블록도.1 is a circuit block diagram of a typical fully tuned tuner.

제2(a)도는 본 발명을 설명하기 위한 제1발진기의 요부 상세회로도.2 (a) is a detailed circuit diagram of the main part of the first oscillator for explaining the present invention.

제2(b)도는 제2발진기의 요부 상세 회로도이다.FIG. 2 (b) is a detailed circuit diagram of the main part of the second oscillator.

* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings

ANT : 안테나 10 : 고주파증폭기ANT: Antenna 10: High Frequency Amplifier

20 : 대역통과필터 30 : 믹서20 bandpass filter 30 mixer

40 : 제1발진기 50 : 제1IF필터40: first oscillator 50: first IF filter

60 : 제1IF증폭기 70 : 제2발진기60: first IF amplifier 70: second oscillator

80 : 믹서 90 : 제2IF필터80 mixer 90 second IF filter

100 : 제2IF증폭기 X-tal : 진동자100: second IF amplifier X-tal: oscillator

R1 : 저항 C1~C6 : 캐패시터R1: Resistor C1 ~ C6: Capacitor

L1,L2 : 코일 Q1 : 트랜지스터L1, L2: Coil Q1: Transistor

본 발명은 무선호출수신기(Radio Pager)등 고정 채널을 이용하는 고주파(이하 RF라 함) 수신기에 사용되는 고정형 발진기 제어에 관한 것으로, 특히 업-다운 변환기를 통해서 온도 변화에 따른 온도보상이 효율적으로 이루어지도록 하여 응답특성을 좋게한 업-다운 변환기를 이용한 발진기의 온도보정방법에 관한 것이다.The present invention relates to a fixed oscillator control used in a high frequency (hereinafter referred to as RF) receiver using a fixed channel such as a radio pager, and in particular, temperature compensation according to temperature change is made efficiently through an up-down converter. The present invention relates to a temperature compensation method of an oscillator using an up-down converter having a good response characteristic.

첨부된 도면, 제1도는 일반적인 전자동조튜너의 회로 블럭도가 도시된다.1 is a circuit block diagram of a general fully tuned tuner.

도시된 바와 같이, 안테나(ANT)를 통해 유입되는 신호를 증폭하여 주는 고주파증폭기(10)와, 상기 고주파증폭기(10)를 통해 출력되는 고주파신호를 대역통과시키는 대역통과필터(20)와, 소정의 주파수로 발진파를 발생하는 제1발진기(30)와, 상기 대역통과필터(20)에서 출력되는 신호와 상기 제1발진기(30)에서 출력되는 신호를 혼합하여 주는 믹서(40)와, 상기 믹서(40)에서 출력되는 신호를 중간주파수(이하IF라함)로 필터링하는 제1IF필터(50)와, 상기 제1IF필터(50)에서 출력되는 미약한 IF신호를 증폭하여 주는 제1IF증폭기(60)와, 소정의 주파수로 발진파를 발생하는 제2 발진기(70)와. 상기 제1IF증폭기(60)에서 출력되는 신호와 상기 제2발진기(70)에서 출력되는 신호를 혼합하여 주는 믹서(80)와, 상기 믹서(80)에서 출력되는 신호를 IF로 필터링하는 제2IF필터(90)와, 상기 제2IF필터(90)에서 출력되는 미약한 IF신호를 증폭하여 안정된 IF를 출력하는 제2IF증폭기(100)로 구성된다.As shown, a high frequency amplifier 10 for amplifying a signal flowing through the antenna ANT, a band pass filter 20 for band-passing the high frequency signal output through the high frequency amplifier 10, and a predetermined A first oscillator 30 for generating an oscillation wave at a frequency of 30, a mixer 40 for mixing a signal output from the band pass filter 20 and a signal output from the first oscillator 30, and the The first IF filter 50 for filtering the signal output from the mixer 40 to the intermediate frequency (hereinafter referred to as IF), and the first IF amplifier 60 for amplifying the weak IF signal output from the first IF filter 50. And a second oscillator 70 generating an oscillation wave at a predetermined frequency. A mixer 80 for mixing the signal output from the first IF amplifier 60 and the signal output from the second oscillator 70 and a second IF filter for filtering the signal output from the mixer 80 with IF. And a second IF amplifier 100 for amplifying the weak IF signal output from the second IF filter 90 and outputting a stable IF.

여기서, 상기 대역통과필터(20)의 주파수가 921MHz이고, 제1발진기(30)의 주파수가 900MHz이면, 제1IF필터(50)의 주파수는 21MHz(=921MHz-900MHz)가 된다. 또한, 제2발진기(70)의 주파수가 20.545MHz이면 제2IF필터(90)의 출력 주파수는 455KHz(=21MHz-20.54MHz)가 된다.Here, when the frequency of the band pass filter 20 is 921MHz and the frequency of the first oscillator 30 is 900MHz, the frequency of the first IF filter 50 is 21MHz (= 921MHz-900MHz). In addition, when the frequency of the second oscillator 70 is 20.545 MHz, the output frequency of the second IF filter 90 becomes 455 KHz (= 21 MHz-20.54 MHz).

일반적으로, 고정형으로 설계된 발진기(진동자 및 L-C 탱크회로로 구성)는 사용부품이 세라믹칩 캐패시터로 온도증가에 의해 캐패시터의 값이 감소된다. 여기서, 공진주파수 fo=1/(2π√LC)로 C가 감소시 fo는 높은 주파수로 을라갈 수 밖에 없다.In general, an oscillator (composed of a vibrator and an L-C tank circuit) designed to be fixed has a capacitor value that decreases due to an increase in temperature as a component is a ceramic chip capacitor. Here, when C decreases as the resonance frequency fo = 1 / (2π√LC), fo is forced to go to a higher frequency.

예를 들어, 상기 제1발진기(30)가 온도증가에 따라 올라간다고 하자. 제1IF필터(50)=대역통과필터(20)-제1발진기(30)로, 온도 증가에 의해 제1IF증폭기(50)의 출력 주파수는 낮아진다.For example, assume that the first oscillator 30 rises as the temperature increases. The first IF filter 50 = the band pass filter 20-the first oscillator 30, the output frequency of the first IF amplifier 50 is lowered by the temperature increase.

또한, 제2IF필터(90)도 제1IF필터(50)-제2발진기(70)로, 상기 제1IF필터(50)의 주파수가 낮아져 20.9MHz이고, 제2발진기(70)의 출력주파수는 반대로 높아져 20.6MHz로 변화된다고 하면, IF=20.9-20.6=300MHz로 안정적인 IF를 얻기 힘들게 된다.In addition, the second IF filter 90 is also the first IF filter 50 to the second oscillator 70, the frequency of the first IF filter 50 is lowered to 20.9 MHz, and the output frequency of the second oscillator 70 is reversed. If it is increased to 20.6MHz, it is difficult to obtain a stable IF with IF = 20.9-20.6 = 300MHz.

일반적인 IF수신기에서 위상동기루프(PLL; Phase Locked Loop)를 사용하지 않는 고정 발진기방법은 온도변화에 대한 온도보상이 어렵게 된다.In the general IF receiver, the fixed oscillator method without using a phase locked loop (PLL) makes it difficult to compensate for the temperature change.

본 발명은 상기한 문제점을 해결하고자 안출된 것이다.The present invention has been made to solve the above problems.

따라서, 본 발명의 목적은 더블컨버젼(Double conversion)방식의 RF수신기에서 고정형 발진기의 온도변화를 시스템적, 즉 업-다운 컨버터를 이용하여 해결함으로서 최종 얻고자하는 IF의 온도변화플 안정적으로 유지 좋은 응답 특성을 갖는 수신기를 설계할 수 있도록 한 업-다운 변환기를 이용한 발진기의 온도보정방법을 계공하는 것에 있다.Accordingly, an object of the present invention is to solve the temperature change of a fixed oscillator in a double conversion type RF receiver by using a system, i.e., an up-down converter, to maintain a stable temperature change of IF to be finally obtained. The present invention is to provide a method for temperature compensation of an oscillator using an up-down converter to design a receiver having a response characteristic.

상기한 바와 같은 목적을 달성하기 위한 본 발명은 고주파증폭기와, 대역통과필터와, 제1발진기와, 믹서와, 제1IF필터와, 제1IF증폭기와, 제2발진기와, 믹서와, 제2IF필터와, 제2IF증폭기를 포함하는 전자동조튜너의 발진기 온도보상제어방법에 있어서, 업변환기 방식으로 상기 제1발진기를 포함하는 제1IF필터의 출력을 구현하고, 다운변환기 방식으로 상기 제2발진기를 포함하는 제2IF필터의 출력을 구현하는 특징을 가진다.The present invention for achieving the above object is a high frequency amplifier, a band pass filter, a first oscillator, a mixer, a first IF filter, a first IF amplifier, a second oscillator, a mixer, a second IF filter And an oscillator temperature compensation control method of an automatic tuning tuner including a second IF amplifier, comprising: outputting a first IF filter including the first oscillator by an up-converter; and including the second oscillator by a down-converter It has a feature that implements the output of the second IF filter.

이하 본 발명을 첨부된 도면에 의거하여 설명한다.Hereinafter, the present invention will be described with reference to the accompanying drawings.

변복조이론에서 IF = RF ± 발진주파수로 얻어짐을 알 수 있다. 일반적으로 다운변환기 방식(IF - 발진주파수)을 사용한다. 이에 본 발명은 업변환기 방식(IF=발진주파수-RF)을 사용하여 제1발진기(30)의 주파수가 온도에 의해 증가하고 제2발진기(20)의 주파수도 역시 온도에 의해 증가함으로 제1IF필터(50) = 제1발진기(30) -RF로 제1발진기(30)의 주파수 상승시 제1IF필터(50)의 주파수도 상승, 이 증가한 만큼 제2발진기(70)도 상승하여 최종 IF는 안정적인 455MHz를 얻게 된다.It can be seen from the modulation and demodulation theory that IF = RF ± oscillation frequency. Generally, a down converter method (IF-oscillation frequency) is used. Accordingly, the present invention uses the up-converter method (IF = oscillation frequency-RF) to increase the frequency of the first oscillator 30 by temperature and the frequency of the second oscillator 20 by the temperature. 50, the frequency of the first IF filter 50 also increases when the frequency of the first oscillator 30 rises with the first oscillator 30 -RF, so that the second oscillator 70 also increases as the final IF is stable. You get 455 MHz.

예를 들어, 대역통과필터(20)의 출력주파수가 921MHz이고, 제1발진기(30)의 발진주파수가 942MHz이면, 업변환기 방식에 의해 제1IF필터(50)는 21MHz(=942MHz-921MHz)가 되고, 제2발진기(70)의 발진주파수가 20.545MHz이면, 다운변환기 방식에 의해 제2IF필터(90)는 455MHz(=21MHz-20.54MHz)가 된다.For example, when the output frequency of the band pass filter 20 is 921 MHz and the oscillation frequency of the first oscillator 30 is 942 MHz, the first IF filter 50 is 21 MHz (= 942 MHz-921 MHz) by the up-converter method. When the oscillation frequency of the second oscillator 70 is 20.545 MHz, the second IF filter 90 becomes 455 MHz (= 21 MHz-20.54 MHz) by the down converter method.

상기 제1발진기(30)는 진동자(X-tal)을 이용하여 942MHz의 발진주파수를 발생한다. 여기서 공진주파수는 제2(b)도와 같이 진동자(X-tal)와 코일(Ll) 및 저항(Rl)의 병렬임피던스와 캐패시터(Cl,C2)의 병렬연결 및 코일(L2)과의 직렬임피던스가 된다. 여기서 Cl은 세라믹칩 가변 캐패시터이고, C2는 세라믹 칩 캐패시터로 온도증가에 의해 캐패시턴스가 감소하여 공진주파수(fo)는 증가한다.The first oscillator 30 generates an oscillation frequency of 942 MHz using an oscillator (X-tal). Here, the resonant frequency is the parallel impedance of the vibrator X-tal, the coil Ll and the resistor Rl, the parallel connection of the capacitors Cl and C2 and the series impedance of the coil L2 as shown in FIG. do. Here, Cl is a ceramic chip variable capacitor, C2 is a ceramic chip capacitor, the capacitance decreases with increasing temperature, and the resonance frequency fo increases.

상기 제2발진기(70)는 제2(b)도와 같이 캐패시터(C5)(C6)값이 감소하면 발진주파수는 올라간다. 따라서, 상기 제1발진기(30)가 온도증가에 의해 올라간다면 제1IF필터(50)=제1발진기(30)-대역통과필터(20)로, 제1IP필터(50)의 출력주파수는 상승한다. 그리고, 제2IF필터(90)=제1IF필터(50)-제2발진기(70)이므로, 여기서 제2발진기(70) 역시 온도증가에 의해 상승하므로, IF는 안정적인 값을 가질 수 있다.When the value of the capacitors C5 and C6 decreases as shown in FIG. 2 (b), the second oscillator 70 increases. Therefore, when the first oscillator 30 rises due to an increase in temperature, the output frequency of the first IP filter 50 increases to the first IF filter 50 = the first oscillator 30-the band pass filter 20. . In addition, since the second IF filter 90 = the first IF filter 50-the second oscillator 70, the second oscillator 70 also rises due to an increase in temperature, so that the IF may have a stable value.

이상에서와 같이 본 발명은 무선호출수신기의 더블변환방식의 고정 발진기용 온도 보상을 업/다운 변환기방식을 사용 제1IF필터가 변화한 만큼 제2발진기를 변화(온도 상승시 같이 상승), 이를 이용 하여 안정적인 응답특성을 갖는 수신기 구현할 수 있는 효과가 있다.As described above, the present invention uses the up / down converter method for the temperature compensation for the fixed conversion type oscillator of the wireless call receiver. The second oscillator is changed as the first IF filter is changed (the temperature rises). Therefore, it is possible to implement a receiver having a stable response characteristic.

이상의 설명은 본 발명의 일실시예에 대한 설명에 불과하며, 본 발명은 그 구성의 범위내에서 다양한 변경 및 개조가 가능하다.The above description is only a description of one embodiment of the present invention, the present invention is capable of various changes and modifications within the scope of the configuration.

Claims (1)

안테나(ANT)를 통해 유입되는 신호를 증폭하여 주는 고주파증폭기(10)와, 상기 고주파증폭기(10)를 통해 출력되는 고주파신호를 대역통과시키는 대역통과필터(20)와, 소정의 주파수로 발진파를 발생하는 제1발진기(30)와, 상기 대역통과필터(20)에서 출력되는 신호와 상기 제1발진기(30)에서 출력되는 신호를 혼합하여 주는 믹서(40)와, 상기 믹서(40)에서 출력되는 신호를 중간주파수로 필터링하는 제1IF필터(57)와, 상기 제1IF필터(50)에서 출력되는 미약한 IF신호를 증폭하여 주는 제1IF증폭기(60)와, 소정의 주파수로 발진파를 발생하는 제2발진기(70)와, 상기 제1IF증폭기(60)에서 출력되는 신호와 상기 제2발진기(70)에서 출력되는 신호를 혼합하여 주는 믹서(80)와, 상기 믹서(80)에서 출력되는 신호를 IF로 필터링하는 제2IF필터(90)와, 상기 제2IF필터(90)에서 출력되는 미약한 IF신호를 증폭하여 안정된 IF를 출력하는 제2IF증폭기(170)를 포함하는 전자동조튜너의 발진기 온도보상 제어방법에 있어서, 업변환기 방식으로 상기 제1발진기(30)를 포함하는 제1IF필터(50)의 출력을 구현하고, 다운변환기 방식으로 상기 제2발진기(70)를 포함하는 제2IF필터(90)의 출력을 구현하는 것을 특징으로 하는 업-다운 변환기를 이용한 발진기의 온도보정방법.A high frequency amplifier 10 for amplifying a signal flowing through the antenna ANT, a band pass filter 20 for band-passing a high frequency signal output through the high frequency amplifier 10, and an oscillation wave at a predetermined frequency The first oscillator 30 for generating a, the mixer 40 for mixing the signal output from the band pass filter 20 and the signal output from the first oscillator 30, and in the mixer 40 A first IF filter 57 for filtering the output signal at an intermediate frequency, a first IF amplifier 60 for amplifying the weak IF signal output from the first IF filter 50, and an oscillation wave at a predetermined frequency. A mixer 80 for mixing the generated second oscillator 70, the signal output from the first IF amplifier 60, and the signal output from the second oscillator 70, and an output from the mixer 80; The second IF filter 90 for filtering the signal to be IF, and the US output from the second IF filter 90 In the oscillator temperature compensation control method of an auto-tuning tuner comprising a second IF amplifier (170) for amplifying an IF signal and outputting a stable IF, the first IF filter including the first oscillator (30) in an up-converter manner ( 50) and the output of the second IF filter (90) including the second oscillator (70) in the down converter method to implement the temperature compensation method of the oscillator using an up-down converter.
KR1019950058513A 1995-12-27 1995-12-27 Temperature correcting method using up-down converter KR100264836B1 (en)

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KR100264836B1 true KR100264836B1 (en) 2000-09-01

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JP3631037B2 (en) * 1999-03-18 2005-03-23 アルプス電気株式会社 Television tuner

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