JPS60229535A - Multiband receiver - Google Patents
Multiband receiverInfo
- Publication number
- JPS60229535A JPS60229535A JP8642484A JP8642484A JPS60229535A JP S60229535 A JPS60229535 A JP S60229535A JP 8642484 A JP8642484 A JP 8642484A JP 8642484 A JP8642484 A JP 8642484A JP S60229535 A JPS60229535 A JP S60229535A
- Authority
- JP
- Japan
- Prior art keywords
- band
- mixer
- local oscillator
- frequency amplifier
- bands
- 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
Links
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
- H03J5/00—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner
- H03J5/24—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner with a number of separate pretuned tuning circuits or separate tuning elements selectively brought into circuit, e.g. for waveband selection or for television channel selection
- H03J5/242—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner with a number of separate pretuned tuning circuits or separate tuning elements selectively brought into circuit, e.g. for waveband selection or for television channel selection used exclusively for band selection
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、Ｖｌ（Ｆ帯の多〕（ンド受信機の改良に関す
るものである。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an improvement in a Vl (F band) receiver.
従来例の構成とその問題点 以下に従来の多バンド受信機について説明する。Conventional configuration and its problems A conventional multi-band receiver will be explained below.
第１図は従来の多バンド受信機のブロック図を示すもの
であり、１はアンテナ整合回路を含む第１バンドの高周
波増幅器、２はアンテナ整合回路を含む第２バンドの高
周波増幅器、３は第１バンドの局部発振器、４は第２バ
ンドの局部発振器、５は第１バンドの混合器、６は第２
バンドの混合器、７は混合器５と６の出力の切換回路、
８はバンド切換スイッチである。FIG. 1 shows a block diagram of a conventional multiband receiver, in which 1 is a first band high frequency amplifier including an antenna matching circuit, 2 is a second band high frequency amplifier including an antenna matching circuit, and 3 is a first band high frequency amplifier including an antenna matching circuit. 1 band local oscillator, 4 the second band local oscillator, 5 the first band mixer, 6 the second band local oscillator
band mixer; 7 is a switching circuit for the outputs of mixers 5 and 6;
8 is a band changeover switch.
以上のように構成された従来の多バンド受信機について
、以下その動作について説明する。The operation of the conventional multi-band receiver configured as described above will be described below.
１ずバンド切換スイッチ８を端子８＋ａの方に投入する
と第１バンドの高周波増幅器１、局部発振器３、混合器
５に電源が入って第１バンド全受信するとともに、ダイ
オード７ａが導通して第１バンドを受信した中間周波数
を出力する。次にバンド切換スイッチ８を端子８ｂの方
に投入すると第２バンドの高周波増幅器２、局部発振器
４、混合器６に電源が入って第２バンドを受信するとと
もに、ダイオード７ｂが導通して第２バンド全受信した
中間周波数を出力する。1) When the band changeover switch 8 is turned on to the terminal 8+a, the power is turned on to the high frequency amplifier 1, local oscillator 3, and mixer 5 of the first band, and the entire first band is received, and the diode 7a is conductive, so that the first band Outputs the intermediate frequency of the received band. Next, when the band changeover switch 8 is turned on to the terminal 8b, the high frequency amplifier 2, local oscillator 4, and mixer 6 of the second band are powered on and receive the second band, and the diode 7b is conductive and the second band is turned on. Outputs the intermediate frequencies received in all bands.
しかしながら」＝記のような構成では、各バンドに独立
した混合器が設けてあり、その出力はインピーダンスが
低いので第１図に示すような切換回路７が、スイッチで
切換える必要があった。However, in the configuration shown in "=", an independent mixer is provided for each band, and since the output thereof has a low impedance, it is necessary to use a switch to switch the switching circuit 7 shown in FIG.
発明の目的
本発明は上記従来の問題点全解消するもので、簡素な構
成で多バンドを受信できる受信機を提供することを目的
とする。OBJECTS OF THE INVENTION The present invention solves all of the above-mentioned conventional problems, and it is an object of the present invention to provide a receiver capable of receiving multiple bands with a simple configuration.
発明の構成
本発明は第１バンドの高周波増幅器の出力と、第２バン
ドの高周波増幅器の出力と、第１バンドの局部発振器の
出力と、第２バンドの局部発振器の出力を共通の混合器
に接続する各々の小容量コンデンサを備えた多バンド受
信機であり、バンド切換スイッチで電源を切換えて供給
することにより容易に受信バンドを切換えることのでき
るものである。Structure of the Invention The present invention combines the output of a first band high frequency amplifier, the second band high frequency amplifier output, the first band local oscillator output, and the second band local oscillator output into a common mixer. This is a multiband receiver equipped with small capacitors connected to each, and the receiving band can be easily switched by switching and supplying power with a band switching switch.
実施例の説明
第２図は本発明の一実施例における多バンド受信機のブ
ロック図を示すものである。第２図において第１図と同
じ機能の部分は同じ番号を付して説明を省略する。９は
第１バンドと第２バンドに共通の混合器、１０，１１．
１２．１３は各々結合コンデンサで０．５〜３ｐＦ で
ある。ここで、第１バンドをテレビジョン（以下ＴＶと
いう）放送の４〜１２Ｃｈ （１７５〜２２５ＭＨ２）
ｌ第２バンドを２Ｍワイドバンド（７６〜１ ｏｓＭＨ
ｚ ）とする。DESCRIPTION OF THE EMBODIMENTS FIG. 2 shows a block diagram of a multi-band receiver in one embodiment of the present invention. In FIG. 2, parts having the same functions as those in FIG. 1 are given the same numbers, and explanations thereof will be omitted. 9 is a mixer common to the first band and the second band; 10, 11.
12 and 13 are coupling capacitors each having a value of 0.5 to 3 pF. Here, the first band is television (hereinafter referred to as TV) broadcasting from 4 to 12 Ch (175 to 225 MH2).
lThe second band is 2M wideband (76~1 osMH
z).
以上のように構成された本実施例の多バンド受信機につ
いて、以下その動作を説明する。The operation of the multiband receiver of this embodiment configured as described above will be described below.
１ず、バンド切換スイッチ８を端子８２ＬのＴＶの４０
ｈ〜１２ｃｈの第１バンドに投入すると、高周波増幅器
１と局部発振器３に電源が入って、ＴＶの４０ｈ〜１２
ｃｈを受信する。このとき、同調回路の選択性により第
１バンドの同調回路のインピーダンスが高く、第２バン
ドの同調回路のインピーダンスが低いので、結合コンデ
ンサ１１と１３が混合器９の入力とアースの間に入る形
となり、第２バンドの回路の影響を受けることはない。1. Set the band selector switch 8 to the terminal 82L of the TV.
When the first band of 40h~12ch is turned on, the high frequency amplifier 1 and local oscillator 3 are turned on, and the TV 40h~12ch is turned on.
Receive ch. At this time, due to the selectivity of the tuning circuit, the impedance of the first band tuning circuit is high and the impedance of the second band tuning circuit is low, so the coupling capacitors 11 and 13 are inserted between the input of the mixer 9 and the ground. Therefore, it is not affected by the second band circuit.
第１バンドの影響を受けることなく高周波増幅器２と局
部発振器４により２Ｍワイドバンドを受信する。The 2M wide band is received by the high frequency amplifier 2 and the local oscillator 4 without being affected by the first band.
以上のように本実施例によれば、第１バンドと第２バン
ドに共通の混合器に各バンドの高周波増幅器と局部発振
器を各々小容量の結合コンデンサで接続しているので、
電源を切り換えるだけで他のバンドの影響を受けること
なく混合器が１つで２つのバンドを受信することができ
る。As described above, according to this embodiment, the high frequency amplifier and local oscillator of each band are connected to the mixer common to the first band and the second band using coupling capacitors of small capacity.
Just by switching the power supply, one mixer can receive two bands without being affected by other bands.
発明の効果
本発明は第１バンドの高周波増幅器の出力と、第２バン
ドの高周波増幅器の出力と、第１バンドの局部発振器の
出力と、第２バンドの局部発振器の出力を共通の混合器
に各々小容量の結合コンデンサで接続しているので、混
合器の出力を切換えることなく簡素な構成で両バンドを
受信できる。Effects of the Invention The present invention combines the output of the first band high frequency amplifier, the second band high frequency amplifier output, the first band local oscillator output, and the second band local oscillator output into a common mixer. Since each band is connected by a small-capacity coupling capacitor, both bands can be received with a simple configuration without switching the output of the mixer.
従って安価に多バンド受信機を実現できるものである。Therefore, a multi-band receiver can be realized at low cost.
第１図は従来の多バンド受信機のブロック図、第２図は
本発明の一実施例における多バンド受信機のブロック図
である。
１．２・・・高周波増幅器、３，４ ・局部発振器＼５
、６ 、９−、、、混合器、１０，１１，１２゜１３
結合コンデンサ。FIG. 1 is a block diagram of a conventional multiband receiver, and FIG. 2 is a block diagram of a multiband receiver according to an embodiment of the present invention. 1.2...High frequency amplifier, 3,4 ・Local oscillator\5
,6,9-,,,mixer,10,11,12゜13
Coupling capacitor.
Claims (1)
周波増幅器の出力と、第１）（ンドの局部発振器の出力
と、第２バンドの局部発振器の出力を共通の混合器に各
々小容量の結合コンデンサを介して供給するとともに、
各バンドの電源を切換えて供給することにより受信）（
ンドを切換えるようにした多バンド受信機・The output of the high frequency amplifier of the first band, the output of the high frequency amplifier of the second band, the output of the local oscillator of the first band, and the output of the local oscillator of the second band are input to a common mixer. In addition to supplying it through a capacitive coupling capacitor,
Reception by switching and supplying power to each band) (
A multi-band receiver that switches between bands.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8642484A JPS60229535A (en) | 1984-04-27 | 1984-04-27 | Multiband receiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8642484A JPS60229535A (en) | 1984-04-27 | 1984-04-27 | Multiband receiver |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS60229535A true JPS60229535A (en) | 1985-11-14 |
Family
ID=13886509
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8642484A Pending JPS60229535A (en) | 1984-04-27 | 1984-04-27 | Multiband receiver |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60229535A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01213031A (en) * | 1988-02-22 | 1989-08-25 | Hitachi Ltd | Tuner circuit device |
| US4982444A (en) * | 1985-05-28 | 1991-01-01 | Sharp Kabushiki Kaisha | Television tuning apparatus capable as serving selectively as a UHF tuner and a VHF tuner |
| EP0592190A2 (en) * | 1992-10-05 | 1994-04-13 | Nec Corporation | Local oscillator and its frequency switching method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5012241U (en) * | 1973-05-28 | 1975-02-07 | ||
| JPS5711850B2 (en) * | 1978-10-25 | 1982-03-06 |
-
1984
- 1984-04-27 JP JP8642484A patent/JPS60229535A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5012241U (en) * | 1973-05-28 | 1975-02-07 | ||
| JPS5711850B2 (en) * | 1978-10-25 | 1982-03-06 |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4982444A (en) * | 1985-05-28 | 1991-01-01 | Sharp Kabushiki Kaisha | Television tuning apparatus capable as serving selectively as a UHF tuner and a VHF tuner |
| JPH01213031A (en) * | 1988-02-22 | 1989-08-25 | Hitachi Ltd | Tuner circuit device |
| JP2581733B2 (en) * | 1988-02-22 | 1997-02-12 | 株式会社日立製作所 | Monolithic integrated circuit, tuner circuit device, and receiver |
| EP0592190A2 (en) * | 1992-10-05 | 1994-04-13 | Nec Corporation | Local oscillator and its frequency switching method |
| EP0592190A3 (en) * | 1992-10-05 | 1994-04-27 | Nec Corporation | Local oscillator and its frequency switching method |
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