JPS61131919A - Front end - Google Patents

Front end

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Publication number
JPS61131919A
JPS61131919A JP25322184A JP25322184A JPS61131919A JP S61131919 A JPS61131919 A JP S61131919A JP 25322184 A JP25322184 A JP 25322184A JP 25322184 A JP25322184 A JP 25322184A JP S61131919 A JPS61131919 A JP S61131919A
Authority
JP
Japan
Prior art keywords
oscillator
local
tuning circuit
mixer
oscillation
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.)
Pending
Application number
JP25322184A
Other languages
Japanese (ja)
Inventor
Masahito Yamaguchi
雅人 山口
Koji Ishida
石田 弘二
Masaharu Sakamoto
正治 阪本
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Pioneer Corp
Original Assignee
Pioneer Electronic Corp
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 Pioneer Electronic Corp filed Critical Pioneer Electronic Corp
Priority to JP25322184A priority Critical patent/JPS61131919A/en
Publication of JPS61131919A publication Critical patent/JPS61131919A/en
Pending legal-status Critical Current

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  • Superheterodyne Receivers (AREA)

Abstract

PURPOSE:To constitute a front end of a 2-band receiver with simple constitution by providing a single local oscillator using a fundamental wave and its harmonics so as to plural band frequencies into a single IF. CONSTITUTION:An oscillator 31 is connected to an oscillation tuning circuit 30 and its oscillation output is fed to a mixer 12 via a mixer 5 and a 2nd harmonic extraction circuit 32. In selecting the IF of a lower local system superheterodyne receiver to, e.g., 10.7MHz, it is required for local oscillators of 65.3-79.3MHz, 79.3-97.3MHz and 164.3-212.3MHz. When the local oscillator 31 oscillates frequencies of 65.3-106.15MHz, since the secondary harmonic is in the range of 130.6-212.3MHz, the lower local system superheterodyne receiver has all the required local oscillating frequencies to receive an FM and TVVHF signal in utilizing the harmonics. Thus, two bands are received selectively by a single local oscillator.

Description

【発明の詳細な説明】 〔技術分野〕 この発明は、スーパーヘテロダイン方式のフロントエン
ドに関するものである。
DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a superheterodyne front end.

〔従来技術〕[Prior art]

従来、この種の装置として第1図に示すものがあった。 Conventionally, there has been a device of this type as shown in FIG.

図において1はアンテナ、2は四−回路、3 。In the figure, 1 is an antenna, 2 is a four-circuit, and 3 is.

はRFア/プ、4は同調回路、5はミキサーである。ま
た6は発掘同調回路、7T/′i発掘同調回路6に接続
された発掘器である。この発振器7の出力はミキサー5
及びプリスケーラ−8に接続される。
is an RF amplifier, 4 is a tuning circuit, and 5 is a mixer. Further, 6 is an excavation tuning circuit, and an excavation device connected to the 7T/'i excavation tuning circuit 6. The output of this oscillator 7 is the mixer 5
and a prescaler 8.

同様に9は同一回路、10はRFアンプ、11は同調回
路、12riξキサ−で、また13は発振同調回路、1
4は完像同調回路13に″接続された発掘4であって、
発振器14の出力はミキサー12及びプリスケーラー1
5に接続される。
Similarly, 9 is the same circuit, 10 is an RF amplifier, 11 is a tuning circuit, 12riξ mixer, and 13 is an oscillation tuning circuit, 1
4 is an excavation 4 connected to the perfect image tuning circuit 13,
The output of the oscillator 14 is sent to the mixer 12 and the prescaler 1.
Connected to 5.

ミキサー5及び12の出力は、セレクター16に接続さ
れ、この出力はBPF17を通って出力される。また、
プリスケーラ−8及び15の出力はセレクター18に接
続され、この出力は可変分周器19に入力される。
The outputs of the mixers 5 and 12 are connected to a selector 16, and the outputs are outputted through a BPF 17. Also,
The outputs of prescalers 8 and 15 are connected to a selector 18, and this output is input to a variable frequency divider 19.

21は基準発振器で、可変分周519及び基準発−j辰
器21の出力は位相比較器20に入力されておシ、この
出力FiLPF22を清適して1同調回路2,4,9.
11発蛋同調回路6,13に接続されている。
21 is a reference oscillator, and the outputs of the variable frequency divider 519 and the reference oscillator 21 are input to the phase comparator 20, and this output FiLPF 22 is outputted to the 1 tuning circuits 2, 4, 9 .
11 is connected to protein synchronization circuits 6 and 13.

かかる構成において、次に動作について説明する。In this configuration, the operation will be explained next.

第1図は一般的な2バンドのスーパーへテロダイア方式
のシンセサイザーチューナーのフロントエンド部を示し
ている。同調回路2、RFアンプ3、同調回路4で同調
選択されたRF倍信号、発振同調回路6、発振57で発
生された局部発条信号をミキサー5でミキシングし、B
PF17でIF’信号成分のみを選別して出力する系と
、同調回路9、RFアンプ10.同vI4回路11及び
発振同調回路13、発振器14、ミキサー12、更にB
PF17によってIF信号成分を得る系とがあって、各
々が別々の受信帯域をカバーし、セレクタ16によって
−づれかの系を選択できる。
FIG. 1 shows the front end section of a general two-band superheterodia type synthesizer tuner. The RF multiplied signal tuned by the tuning circuit 2, RF amplifier 3, and tuning circuit 4, and the local oscillation signal generated by the oscillation tuning circuit 6 and oscillation 57 are mixed by the mixer 5, and the B
A system that selects and outputs only the IF' signal component using the PF 17, a tuning circuit 9, and an RF amplifier 10. vI4 circuit 11, oscillation tuning circuit 13, oscillator 14, mixer 12, and further B
There is a system for obtaining an IF signal component by the PF 17, each of which covers a different reception band, and the selector 16 can select one of the systems.

また、グリスケーラー8及び15は各系の局部発振信号
を適当に分周し、セレクタ16と周期して動作するセレ
クタ18によ)、可変分局器19に印加される。この可
変分周a19及び基準発振器21の周波数が等しくなる
ように、位相比較器20及びLPF22の出力で発振同
調回路6、発振器7または発振同調回路13、発振器1
4から成る局部発振器の発掘周波数が制御式れる。
Further, the grease scalers 8 and 15 appropriately divide the frequency of the local oscillation signal of each system, and apply the frequency to the variable division divider 19 by a selector 18 operating in periodic relation with the selector 16. The outputs of the phase comparator 20 and LPF 22 are used to connect the oscillation tuning circuit 6, the oscillator 7 or the oscillation tuning circuit 13, and the oscillator 1 so that the frequencies of the variable frequency divider a19 and the reference oscillator 21 become equal.
The excavation frequency of the local oscillator consisting of 4 is controlled.

また、可変分周器19の分周比を可変することで、局部
発振器のその発振周波数を可変でき、希望するRF倍信
号同調選択してIF倍信号出力できる。
Further, by varying the frequency division ratio of the variable frequency divider 19, the oscillation frequency of the local oscillator can be varied, and a desired RF multiplied signal can be tuned and outputted as an IF multiplied signal.

従来のフロントエンドは従来のように構成されているの
で、2パンどの受信機の場合、その共用部分が少なく、
特に局部発振回路及びプリスケーラ−を2系統設ける必
要があって構成が複雑になるという欠点を有していた。
Since the conventional front end is configured in the conventional manner, in the case of any two-pan receiver, there are few common parts,
In particular, it has the disadvantage that it requires two systems of local oscillation circuits and prescalers, making the configuration complicated.

不発fIAは成上の点に鑑み成されたもので、共通に使
用できるブロックを設けて、全体の構成をより簡単にし
たフロントエンドを提供することを目的としている。
The unfired fIA was created in consideration of the current situation, and its purpose is to provide a front end with a simpler overall configuration by providing blocks that can be used in common.

〔実施例〕〔Example〕

以下この発明の実施例を図に基づいて説明する。 Embodiments of the present invention will be described below with reference to the drawings.

図において1はアンテナで、このアンテナ1に縦続に接
続された同調回路2、RFアンプ3、同調回路4、及び
ミキサー5が設けられ、同様にアンテナIK縦統に接続
された同調回路9、RRFアンプ10、同調回路11及
びミキサー12が設けられている。
In the figure, 1 is an antenna, and a tuning circuit 2, an RF amplifier 3, a tuning circuit 4, and a mixer 5 are provided which are connected in series to the antenna 1, and a tuning circuit 9, which is similarly connected in series with the antenna IK, and an RRF An amplifier 10, a tuning circuit 11 and a mixer 12 are provided.

また、30は発振同調回路で、発振器31は発振同調回
路30に接続された発振器であり、この出カバミキサー
5及び2次高調波抽出器32に接続され、この出力はミ
キサー12に入力されている。
Further, 30 is an oscillation tuning circuit, and an oscillator 31 is an oscillator connected to the oscillation tuning circuit 30, which is connected to the output mixer 5 and the second harmonic extractor 32, and whose output is input to the mixer 12. There is.

さらに、発振器31の出力は、グリスケーラー33に接
続され、この出力は可変分周器19に接続される。21
は基準発祭器であり、可変分周器19及び基準発振器2
1の出力は位相比較器20に入力され、この出力はLP
F22を通過して同調回路2,4,9.11及び発振同
調回路30に印加される。
Further, the output of the oscillator 31 is connected to a grease scaler 33, which is connected to a variable frequency divider 19. 21
is the reference oscillator, and the variable frequency divider 19 and the reference oscillator 2
1 is input to the phase comparator 20, and this output is LP
It passes through F22 and is applied to the tuning circuits 2, 4, 9.11 and the oscillation tuning circuit 30.

また、ミキサー5及び12の出力は、セレクター16で
選択された後、BPFを通って出力される。
Further, the outputs of the mixers 5 and 12 are selected by the selector 16 and then outputted through the BPF.

次にこの発明の作用について説明する。Next, the operation of this invention will be explained.

従来の構成において、2ノくンドに対応して2つずつあ
った発振同調回路、発振器及びグリスケーラーを各々1
つに減らし、また、セレクター18を省略し、−万、2
次高周波抽出回路32を付加した構成となっている。
In the conventional configuration, the oscillation tuning circuit, oscillator, and grease scaler, which were two each corresponding to two nodes, are now replaced with one each.
Also, selector 18 is omitted, -10,000, 2
It has a configuration in which a next high frequency extraction circuit 32 is added.

例えば、今FM及びVHFTV音声を受信できる2バン
ド受信機を考える。FMは76MHzから90MHz、
TVは90MHz〜108MH1,及び175MHz 
〜223MHzの帯域を受信すればよい。
For example, consider a current two-band receiver that can receive FM and VHFTV audio. FM is 76MHz to 90MHz,
TV is 90MHz~108MH1, and 175MHz
It is sufficient to receive the band of ~223MHz.

ロワーローカル方式のスーパーヘテロタイン受信機で蝶
、IP用波数を10.7M)tzK選べば、65.3M
Hz〜79.3MHz、  79.3MHz 〜97.
3 M Hz及び164.3MHz 〜212゜3MH
zの局部発振器が必要になる。
If you select a butterfly IP wave number of 10.7M)tzK with a lower local type superheterotine receiver, it will be 65.3M.
Hz~79.3MHz, 79.3MHz~97.
3MHz and 164.3MHz ~ 212°3MH
A local oscillator for z is required.

ざて、局部発振器が65.3 M Hz 〜106.1
5MQzの範囲で発振できるとすれば、その2次高周波
tt130.6MHz〜212.3MHzの範囲にある
ため、これを用いれば前記のロワーミーカルフッ式スー
パーヘテロダイン受信機はFM及びTVVHF信号を受
信するためにその必要とする局部発振周波数範囲をすべ
てもつことになって、単一の局部発振器で、2つの帯域
を選択受信できることになる。
Then, the local oscillator is 65.3 MHz ~ 106.1
If it is possible to oscillate in the range of 5 MQz, the secondary high frequency tt is in the range of 130.6 MHz to 212.3 MHz, so if this is used, the above-mentioned Lower Mee Calf type superheterodyne receiver can receive FM and TV VHF signals. Therefore, it has all the necessary local oscillation frequency ranges, and can selectively receive two bands with a single local oscillator.

その際、栄分な帯域は、可変分局器19に与える分周比
を制限することで容易に削去することができ、一般に可
変分周器19がマイコン等を用いた制御回路を使用して
いることからも、前記の制限処理は全体の構成を何ら変
更することな〈実施できて、結局、フロントエンド全体
の構成は極めて簡明となる。
At that time, the advantageous band can be easily eliminated by limiting the frequency division ratio given to the variable frequency divider 19, and generally the variable frequency divider 19 uses a control circuit using a microcomputer or the like. Because of this, the above-mentioned restriction processing can be implemented without any changes to the overall configuration, and as a result, the overall configuration of the front end becomes extremely simple.

なお、上記実施例では、特に2次扁周波について着目し
たが、3次以上の高周波についても同様に流用しうる。
In addition, in the above-mentioned example, attention was paid especially to the second-order flat frequency wave, but the high frequency wave of the third order or higher can also be used in the same way.

また、2つの帯域受信のできる系について説明i−たが
、3つ以上の系としてもよい。また、この高周波は逓倍
器によって発生させてもよい。
Furthermore, although a system capable of reception in two bands has been described, a system with three or more bands may be used. Alternatively, this high frequency may be generated by a multiplier.

〔効 来〕[comes into effect]

以上のようにこの発明によれば、より簡易な構成で2バ
ンド受信機のフロントエンドを構成できる。
As described above, according to the present invention, the front end of a two-band receiver can be configured with a simpler configuration.

【図面の簡単な説明】[Brief explanation of drawings]

第1図は従来のフロントエンドを示す構成図、第2図は
本考案の一実施例による70ントエンドを示す構成図で
ある。 2、 4. 9. 11・−・・・同調回路3.10・
・・・・・RFアンプ 5.12・・・・・・ミキサー 6.13.30・・・・・・発振同調回路7.14.3
1・・・・・・発振器 8.15.33・・・・・・プリスケーラ−16,18
・・・・・・セレクタ 17・・・・−BPF 19−−−−一可変分局器 20・・・・・・位相比較器 21−−−−−基準発掘器 22・・・・・・LPF 32・−−−−−2次高調波抽出器 特許出願人  パイオニア株式会社 −第1図
FIG. 1 is a block diagram showing a conventional front end, and FIG. 2 is a block diagram showing a 70-point end according to an embodiment of the present invention. 2, 4. 9. 11... Tuning circuit 3.10.
...RF amplifier 5.12 ...Mixer 6.13.30 ...Oscillation tuning circuit 7.14.3
1... Oscillator 8.15.33... Prescaler 16, 18
......Selector 17...-BPF 19-----Variable divider 20...Phase comparator 21-----Reference excavator 22...LPF 32.---Second harmonic extractor patent applicant Pioneer Corporation - Figure 1

Claims (1)

【特許請求の範囲】[Claims] 単一の局部発振器の出力のうち、基本波及びその高調波
成分を用いて、複数の帯域の周波数を単一の中間周波数
に変換できるようにしたことを特徴としたフロントエン
ド。
A front end that is capable of converting frequencies in multiple bands into a single intermediate frequency by using the fundamental wave and its harmonic components out of the output of a single local oscillator.
JP25322184A 1984-11-30 1984-11-30 Front end Pending JPS61131919A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP25322184A JPS61131919A (en) 1984-11-30 1984-11-30 Front end

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP25322184A JPS61131919A (en) 1984-11-30 1984-11-30 Front end

Publications (1)

Publication Number Publication Date
JPS61131919A true JPS61131919A (en) 1986-06-19

Family

ID=17248245

Family Applications (1)

Application Number Title Priority Date Filing Date
JP25322184A Pending JPS61131919A (en) 1984-11-30 1984-11-30 Front end

Country Status (1)

Country Link
JP (1) JPS61131919A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6484013B1 (en) 1998-06-18 2002-11-19 Nec Corporation Dual-band transceiver and control method therefor
WO2004013954A1 (en) * 2002-08-01 2004-02-12 Koninklijke Philips Electronics N.V. Dual mode tuning arrangement

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6484013B1 (en) 1998-06-18 2002-11-19 Nec Corporation Dual-band transceiver and control method therefor
WO2004013954A1 (en) * 2002-08-01 2004-02-12 Koninklijke Philips Electronics N.V. Dual mode tuning arrangement
US7301584B2 (en) * 2002-08-01 2007-11-27 Nxp B.V. Dual mode tuning arrangement

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