JP2951156B2 - Temperature compensated radio receiver - Google Patents
Temperature compensated radio receiverInfo
- Publication number
- JP2951156B2 JP2951156B2 JP15957393A JP15957393A JP2951156B2 JP 2951156 B2 JP2951156 B2 JP 2951156B2 JP 15957393 A JP15957393 A JP 15957393A JP 15957393 A JP15957393 A JP 15957393A JP 2951156 B2 JP2951156 B2 JP 2951156B2
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- tuning
- temperature
- signal
- radio receiver
- 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.)
- Expired - Lifetime
Links
Landscapes
- Circuits Of Receivers In General (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、ラジオ受信機の温度変
化によって発生したトラッキングエラーを無くす温度補
償型ラジオ受信機に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a temperature-compensated radio receiver for eliminating a tracking error caused by a change in temperature of the radio receiver.
【０００２】[0002]
【従来の技術】従来のラジオ受信機は、図２の如く構成
され、１は受信ＲＦ信号を増幅するＲＦ増幅回路、２は
受信ＲＦ信号を同調するＲＦ同調回路、３はＩＦ信号を
発生する混合回路、４はＩＦ信号を増幅するＩＦ増幅回
路、５はＩＦ信号を検波する検波回路、１３は局発信号
を発生するＯＳＣ、６はＯＳＣ１３を制御するＰＬＬ回
路、７は放送局の電界強度を検出するＳ（シグナル）メ
ーター回路、２１は制御信号を発生する制御回路、２２
は記憶回路である。2. Description of the Related Art A conventional radio receiver is constructed as shown in FIG. 2, wherein 1 is an RF amplifier circuit for amplifying a received RF signal, 2 is an RF tuning circuit for tuning a received RF signal, and 3 is an IF signal. A mixing circuit, 4 an IF amplification circuit for amplifying the IF signal, 5 a detection circuit for detecting the IF signal, 13 an OSC for generating a local oscillation signal, 6 a PLL circuit for controlling the OSC 13, and 7 an electric field strength of the broadcasting station. S (signal) meter circuit for detecting the control signal, 21 is a control circuit for generating a control signal, 22
Is a storage circuit.
【０００３】アンテナを介して受信された受信ＲＦ信号
は、ＲＦ増幅回路１で増幅され、ＲＦ同調回路２で周波
数選択され、混合回路３においてＯＳＣ１３から発生す
る局発信号と混合され、所定のＩＦ信号に変換される。
そして、ＰＬＬ回路６から発生する局発制御信号によっ
て前記局発信号を可変すると同時に、制御回路２１から
発生するＰＬＬ回路６の局発制御信号に応じた制御信号
に基づいてＲＦ同調回路２の同調周波数を可変すること
によって、選局が行われる。A received RF signal received via an antenna is amplified by an RF amplifier circuit 1, frequency-selected by an RF tuning circuit 2, mixed with a local signal generated from the OSC 13 by a mixing circuit 3, and is supplied to a predetermined IF. Converted to a signal.
The local oscillation signal is varied by the local oscillation control signal generated by the PLL circuit 6, and at the same time, the tuning of the RF tuning circuit 2 is performed based on the local oscillation control signal of the PLL circuit 6 generated by the control circuit 21. Tuning is performed by changing the frequency.
【０００４】ＰＬＬ回路６から局発制御信号が発生する
と、それに応じてＯＳＣ１３の局発信号周波数が決ま
り、混合回路３の出力端に４５０ＫＨｚのＩＦ信号が発
生する。前記局発制御信号は、制御回路２１にも印加さ
れるので、前記制御回路２１から所定の制御信号が発生
し、前記局発制御信号に応じてＲＦ同調回路２の同調周
波数が決まる。When the local oscillation control signal is generated from the PLL circuit 6, the local oscillation signal frequency of the OSC 13 is determined accordingly, and an IF signal of 450 KHz is generated at the output terminal of the mixing circuit 3. Since the local oscillation control signal is also applied to the control circuit 21, a predetermined control signal is generated from the control circuit 21, and the tuning frequency of the RF tuning circuit 2 is determined according to the local oscillation control signal.
【０００５】その後、前記放送局を最適に受信する為
に、ＲＦ同調回路２の微調整が行われる。制御回路２１
は、制御信号を前記所定の制御信号値を中心とする所定
範囲内において微小な所定ステップで変化させることに
よって、ＲＦ同調回路２の同調周波数を変化させる。前
記制御信号の変化に応じて、ステップごとの制御信号の
値と該制御信号に対応したＳメーター回路７で検出され
た電界強度が記憶回路２２に記憶される。制御信号の変
化終了後、制御回路２１は記憶された電界強度の中から
最大値の電界強度を判別し、前記最大電界強度に対応し
た制御信号を記憶回路２２から読み出し、ＲＦ同調回路
２に印加する。よって、常に前記制御信号を印加するこ
とによって、最適な受信状態が得られていた。[0005] Thereafter, in order to optimally receive the broadcasting station, fine tuning of the RF tuning circuit 2 is performed. Control circuit 21
Changes the tuning frequency of the RF tuning circuit 2 by changing the control signal in small predetermined steps within a predetermined range centered on the predetermined control signal value. In accordance with the change of the control signal, the value of the control signal for each step and the electric field intensity detected by the S meter circuit 7 corresponding to the control signal are stored in the storage circuit 22. After the change of the control signal, the control circuit 21 determines the maximum electric field intensity from the stored electric field intensity, reads out the control signal corresponding to the maximum electric field intensity from the storage circuit 22, and applies the control signal to the RF tuning circuit 2. I do. Therefore, by always applying the control signal, an optimum receiving state has been obtained.
【０００６】[0006]
【発明が解決しようとする課題】しかしながら、図２の
ラジオ受信機において、ＲＦ同調回路２の微調整直後は
ラジオ受信機が最適受信状態になっているが、ＲＦ同調
回路２はコイル及びコンデンサーを含み、該コイル及び
コンデンサーは温度特性をもつので、ラジオ受信機の温
度が変化するとコイルやコンデンサーの値が変化しＲＦ
同調回路２の特性が変化してしまう。即ち、ＲＦ同調回
路２の同調周波数が混合回路３に印加される受信ＲＦ信
号周波数と合わなくなるため、トラッキングエラーが発
生し感度が低下するという問題があった。However, in the radio receiver shown in FIG. 2, the radio receiver is in the optimum reception state immediately after the fine tuning of the RF tuning circuit 2, but the RF tuning circuit 2 has a coil and a capacitor. Since the coil and the capacitor have temperature characteristics, if the temperature of the radio receiver changes, the value of the coil or the capacitor changes and the RF
The characteristics of the tuning circuit 2 change. That is, since the tuning frequency of the RF tuning circuit 2 does not match the frequency of the received RF signal applied to the mixing circuit 3, a tracking error occurs and the sensitivity is reduced.
【０００７】[0007]
【課題を解決するための手段】本発明は上述の点を鑑み
て成されたものであり、ラジオ受信機において、受信放
送局の電界強度を検出する手段と、ラジオ受信機の温度
を検出する手段と、ＲＦ同調回路を構成しているコイル
及びコンデンサーの温度特性を記憶するメモリーと、検
出された温度に応じて、前記メモリーに記憶された温度
特性を補正する手段と、補正された温度特性に応じた制
御信号を発生する手段とを備えたことを特徴とする。SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and has a radio receiver for detecting the electric field strength of a receiving broadcast station and detecting the temperature of the radio receiver. Means, a memory for storing temperature characteristics of a coil and a capacitor constituting the RF tuning circuit, means for correcting the temperature characteristics stored in the memory according to the detected temperature, and a corrected temperature characteristic Means for generating a control signal corresponding to
【０００８】[0008]
【作用】本発明に依れば、受信放送局の電界強度が最大
値になるように最適受信調整が行われた後、ラジオ受信
機の温度を検出し、検出された温度に応じて、メモリー
に記憶されたコイルやコンデンサーの温度特性を補正
し、補正された温度特性に応じた制御信号を発生するこ
とによって、常に温度変化によるＲＦ同調回路からの所
定帯域をもつ信号の周波数のずれを補正し、温度が変化
しても最良受信状態を得ることができる。According to the present invention, after the optimum reception adjustment is performed so that the electric field strength of the receiving broadcasting station becomes the maximum value, the temperature of the radio receiver is detected, and the memory is stored in accordance with the detected temperature. By correcting the temperature characteristics of the coil and capacitor stored in the memory and generating a control signal according to the corrected temperature characteristics, the frequency deviation of the signal with a predetermined band from the RF tuning circuit due to the temperature change is always corrected However, the best reception state can be obtained even if the temperature changes.
【０００９】[0009]
【実施例】図１は本発明の一実施例を示す図であり、９
はラジオ受信機の温度を検出する温度センサー、１０は
放送局の電界強度を第１デジタル値に変換する第１Ａ／
Ｄ変換回路、１１は検出した温度を第２デジタル値に変
換する第２Ａ／Ｄ変換回路、１２は制御データを制御信
号に変換するＤ／Ａ変換回路である。尚、図１において
図２と同一の回路素子については同一の符号を付し、詳
細な説明を省略する。FIG. 1 shows an embodiment of the present invention.
Is a temperature sensor that detects the temperature of the radio receiver, and 10 is a first A / A that converts the electric field strength of the broadcasting station into a first digital value.
A D conversion circuit, 11 is a second A / D conversion circuit for converting the detected temperature into a second digital value, and 12 is a D / A conversion circuit for converting control data into a control signal. In FIG. 1, the same reference numerals are given to the same circuit elements as those in FIG. 2, and the detailed description is omitted.
【００１０】次に、図１の本発明の実施例の動作を図４
を参照しながら説明する。Ｓ１において、ＯＳＣ１３か
ら局発信号が発生し混合回路３に受信ＲＦ信号が印加さ
れることにより、放送局が受信される。制御回路２１は
ＰＬＬ回路６の局発制御信号に基づきＲＦ同調回路２に
制御信号を印加しＲＦ同調回路２から混合回路３の受信
ＲＦ信号を中心とした所定帯域をもつ信号が発生する。
Ｓ２に移り、制御回路２１からの制御信号を微小変化さ
せることによって、ＲＦ同調回路２の同調周波数を微小
変化させながら、放送局の電界強度を検出する。記憶回
路２２に電界強度とそれに対応した制御データを記憶す
る。制御信号の微小変化動作が終了した次点で、電界強
度の最大値を判別し、その制御データを記憶回路２２か
ら読み出し、Ｄ／Ａ変換回路１２を介してＲＦ同調回路
２に印加し、最良の受信状態を得る。Next, the operation of the embodiment of the present invention shown in FIG. 1 will be described with reference to FIG.
This will be described with reference to FIG. In S1, the local station signal is generated from the OSC 13 and the received RF signal is applied to the mixing circuit 3, whereby the broadcast station is received. The control circuit 21 applies a control signal to the RF tuning circuit 2 based on the local oscillation control signal of the PLL circuit 6, and a signal having a predetermined band centering on the reception RF signal of the mixing circuit 3 is generated from the RF tuning circuit 2.
In S2, the control signal from the control circuit 21 is minutely changed, so that the electric field strength of the broadcasting station is detected while the tuning frequency of the RF tuning circuit 2 is minutely changed. The storage circuit 22 stores the electric field intensity and control data corresponding to the electric field intensity. At the next point after the minute change operation of the control signal is completed, the maximum value of the electric field strength is determined, the control data is read out from the storage circuit 22, and applied to the RF tuning circuit 2 via the D / A conversion circuit 12, and Get the receiving status of
【００１１】Ｓ３に移り、一定時間経過後、温度センサ
ー９は温度を検出し、温度センサ−９の出力は、第２Ａ
／Ｄ変換回路１１で第２デジタル値に変換され、制御回
路２１に印加される。制御回路２１は、前記第２デジタ
ル値に基づいてラジオ受信機の温度を算出する。Ｓ４に
おいて、ＯＳＣ１３から発生する局発信号周波数はＰＬ
Ｌ回路６からの局発制御信号により決められ、また、Ｉ
Ｆ信号ｆIFは受信ＲＦ信号ｆRと局発信号ｆLとの混合
（ｆR＝ｆIF＋ｆL）によって得られるので、制御回路２
１は、ＰＬＬ回路６からの局発制御信号と上述のｆR＝
ｆIF＋ｆLの関係とに基づいて、混合回路３に印加され
る受信ＲＦ信号の周波数を算出する。また、制御回路２
１は検出されたラジオ受信機の温度とＲＦ同調回路２に
印加される制御信号とに応じたコイル及びコンデンサー
の値を記憶回路２２から読み出し、読み出されたコイル
やコンデンサーの値からＲＦ同調回路２の同調信号の周
波数を算出する。さらに、制御回路２１は前記同調信号
と受信ＲＦ信号との周波数の差を算出する。その後、制
御回路１２は前記周波数の差がゼロとなるように制御信
号を補正する。尚、コンデンサーの温度特性は例えば図
３の如く示され、温度が高くなると容量が大きくなり、
また、制御信号が大きくなるにつれて容量は大きくな
る。また、コイルの温度特性は温度によって決定し、温
度が高くなるにつれて、インダクタンスが大きくなる。After a lapse of a predetermined time, the temperature sensor 9 detects the temperature, and the output of the temperature sensor 9 becomes the second A
It is converted into a second digital value by the / D conversion circuit 11 and applied to the control circuit 21. The control circuit 21 calculates the temperature of the radio receiver based on the second digital value. In S4, the local oscillation signal frequency generated from the OSC 13 is PL
Determined by the local control signal from the L circuit 6,
Since the F signal f IF is obtained by mixing the received RF signal f R and the local oscillation signal f L (f R = f IF + f L ), the control circuit 2
1 is the local oscillation control signal from the PLL circuit 6 and the above-mentioned f R =
The frequency of the received RF signal applied to the mixing circuit 3 is calculated based on the relationship of f IF + f L. Control circuit 2
Reference numeral 1 denotes a value of a coil and a capacitor corresponding to the detected temperature of the radio receiver and a control signal applied to the RF tuning circuit 2 from a storage circuit 22 and an RF tuning circuit based on the read coil and capacitor values. The frequency of the tuning signal 2 is calculated. Further, the control circuit 21 calculates a frequency difference between the tuning signal and the received RF signal. Thereafter, the control circuit 12 corrects the control signal so that the frequency difference becomes zero. The temperature characteristics of the capacitor are shown, for example, in FIG. 3.
Further, the capacity increases as the control signal increases. The temperature characteristics of the coil are determined by the temperature, and the higher the temperature, the larger the inductance.
【００１２】Ｓ５において、Ｓ４で補正された制御デー
タは、Ｄ／Ａ変換回路１２を介して制御信号に変換さ
れ、ＲＦ同調回路２に印加され、ＲＦ同調回路２の同調
周波数は混合回路３に印加される受信ＲＦ信号周波数と
等しくなるように補正される。よって、ラジオ受信機は
周辺の温度を考慮した最適な受信状態となる。そして、
所定時間が経過した後、Ｓ３に戻り温度検出をし、上述
のように、制御信号の補正が行われる。このようにし
て、制御信号の補正がくり返される。In S5, the control data corrected in S4 is converted into a control signal via a D / A conversion circuit 12, and is applied to the RF tuning circuit 2. The tuning frequency of the RF tuning circuit 2 is transmitted to the mixing circuit 3. The correction is made so as to be equal to the applied RF signal frequency. Therefore, the radio receiver is in an optimal reception state in consideration of the surrounding temperature. And
After the predetermined time has elapsed, the process returns to S3 to detect the temperature, and the control signal is corrected as described above. In this way, the correction of the control signal is repeated.
【００１３】[0013]
【発明の効果】従って、本発明に依れば、所定時間ごと
に、ラジオ受信機の温度を検出し、温度変化によるＲＦ
同調回路の同調周波数のズレを補正することによって、
温度の変化に対して常に最適、最良の受信状態を維持す
ることができる。Therefore, according to the present invention, the temperature of the radio receiver is detected at predetermined time intervals, and the RF by the temperature change is detected.
By correcting the deviation of the tuning frequency of the tuning circuit,
It is possible to always maintain an optimum and best reception state with respect to a change in temperature.
【図１】本発明の一実施例を示す図である。FIG. 1 is a diagram showing one embodiment of the present invention.
【図２】従来例を示す図である。FIG. 2 is a diagram showing a conventional example.
【図３】容量の温度変化を示す図である。FIG. 3 is a diagram showing a temperature change of a capacitance.
【図４】実施例の動作を説明するフローチャートであ
る。FIG. 4 is a flowchart illustrating the operation of the embodiment.
１ ＲＦ増幅回路 ２ ＲＦ同調回路 １０，１１ 第１及び第２Ａ／Ｄ変換回路 １２ Ｄ／Ａ変換回路 DESCRIPTION OF SYMBOLS 1 RF amplifier circuit 2 RF tuning circuit 10, 11 1st and 2nd A / D conversion circuit 12 D / A conversion circuit
Claims (1)
調回路の同調周波数を微調整するラジオ受信機におい
て、 ラジオ受信機の温度を検出する手段と、 ＲＦ同調回路を構成しているコイル及びコンデンサーの
温度特性を記憶するメモリーと、検出された温度及び前記メモリーに記憶された温度特性
に基づいて、前記ＲＦ同調回路の同調周波数を補正する
手段とを備えることを特徴とする 温度補償型ラジオ受信
機。(1) RF tuning is performed so that the received electric field strength becomes a maximum value.
Radio receiver for fine tuning the tuning frequency of the tuning circuit
Means for detecting the temperature of the radio receiver , memory for storing the temperature characteristics of the coil and the capacitor constituting the RF tuning circuit, and the detected temperature and the temperature characteristics stored in the memory.
The tuning frequency of the RF tuning circuit based on
And a temperature-compensated radio receiver.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15957393A JP2951156B2 (en) | 1993-06-29 | 1993-06-29 | Temperature compensated radio receiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15957393A JP2951156B2 (en) | 1993-06-29 | 1993-06-29 | Temperature compensated radio receiver |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0722974A JPH0722974A (en) | 1995-01-24 |
| JP2951156B2 true JP2951156B2 (en) | 1999-09-20 |
Family
ID=15696670
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15957393A Expired - Lifetime JP2951156B2 (en) | 1993-06-29 | 1993-06-29 | Temperature compensated radio receiver |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2951156B2 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3234527B2 (en) * | 1997-03-28 | 2001-12-04 | 三洋電機株式会社 | Radio receiver |
| EP0951147B1 (en) | 1998-04-16 | 2007-03-28 | Koninklijke Philips Electronics N.V. | Receiver and a method for tuning one of the radio frequency stages in a receiver |
| JP3631037B2 (en) | 1999-03-18 | 2005-03-23 | アルプス電気株式会社 | Television tuner |
| JP2007110685A (en) * | 2005-09-16 | 2007-04-26 | Oki Electric Ind Co Ltd | Receiver and method of attenuating disturbance signal |
| CN112761622A (en) * | 2020-12-31 | 2021-05-07 | 国仪石油技术(无锡)有限公司 | Near-bit measurement while drilling device and method |
-
1993
- 1993-06-29 JP JP15957393A patent/JP2951156B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0722974A (en) | 1995-01-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5740525A (en) | Method and apparatus for temperature compensation of a reference oscillator in a communication device | |
| US6243570B1 (en) | Radio receiver capable of temperature adjustment to tuning frequency of RF tuning circuit | |
| JP2951156B2 (en) | Temperature compensated radio receiver | |
| JP2006246419A (en) | Electric wave tuning receiving circuit, electric wave tuning receiving device, and electric wave tuning receiving method | |
| JPH04266223A (en) | Radio receiver | |
| JP2857320B2 (en) | Received signal level detection method | |
| KR100243832B1 (en) | Radio receiver | |
| US20050003780A1 (en) | Receiver and its tracking adusting method | |
| JPS5925410B2 (en) | Receiving machine | |
| JPH09181572A (en) | Automatic synchronizing device of receiver | |
| JP3123776B2 (en) | Electronic tuning receiver | |
| JP2004215034A (en) | Automatically adjustable tuner for tracking filter | |
| JPH048675Y2 (en) | ||
| KR100281360B1 (en) | Weak Field Compensator for Phase-locked Loop FM / AM Tuner | |
| JP2852132B2 (en) | Radio selective call receiver | |
| JP2755842B2 (en) | Superheterodyne receiver and its adjusting device | |
| JP2974296B2 (en) | Radio selective call receiver | |
| KR0158963B1 (en) | Circuit and method for automatic fine tuning | |
| JP2517964B2 (en) | Mobile radio with frequency stabilization function | |
| JP2002111527A (en) | Receiver and its tracking adjusting method | |
| JPH0394523A (en) | Tuning circuit | |
| JPH0510429Y2 (en) | ||
| JP3106693U (en) | Radio receiver | |
| JPH0766743A (en) | Am/fm radio receiver | |
| JPH077385A (en) | Radio receiver |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Year of fee payment: 9 Free format text: PAYMENT UNTIL: 20080709 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Year of fee payment: 9 Free format text: PAYMENT UNTIL: 20080709 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090709 Year of fee payment: 10 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090709 Year of fee payment: 10 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100709 Year of fee payment: 11 |