JPS6019174B2 - Diversity receiving device - Google Patents
Diversity receiving deviceInfo
- Publication number
- JPS6019174B2 JPS6019174B2 JP56178117A JP17811781A JPS6019174B2 JP S6019174 B2 JPS6019174 B2 JP S6019174B2 JP 56178117 A JP56178117 A JP 56178117A JP 17811781 A JP17811781 A JP 17811781A JP S6019174 B2 JPS6019174 B2 JP S6019174B2
- Authority
- JP
- Japan
- Prior art keywords
- stop signal
- circuit
- automatic tuning
- receiving
- automatic
- 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
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
- H04B7/0802—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using antenna selection
- H04B7/0817—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using antenna selection with multiple receivers and antenna path selection
- H04B7/082—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using antenna selection with multiple receivers and antenna path selection selecting best antenna path
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Radio Transmission System (AREA)
- Channel Selection Circuits, Automatic Tuning Circuits (AREA)
Description
【発明の詳細な説明】
本発明は、簡単な回路方式により確実に自動選局動作を
行わせるように構成したダイバーシティ受信装置に関す
るものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a diversity receiving device configured to reliably perform automatic channel selection using a simple circuit system.
受信電波状態に応じて複数の受信回路系を切換可能に構
成したダイバーシティ受信装置において、自動選局停止
信号を発生するための回路方式とし２は従来例えば実関
昭５５一１４３２７号等があり、この種の回路方式の一
例を第１図に示す。A circuit system for generating an automatic tuning stop signal in a diversity receiving device in which a plurality of receiving circuit systems can be switched according to the received radio wave condition is conventionally known, for example, as disclosed in Utsekki No. 55-14327, etc. An example of this type of circuit system is shown in FIG.
同図においてａはａ受信回路系、ｂはｂ受信回路系を示
し、ｌａ，ｌｂはアンテナ、２ａ，２ｂは高周波増中段
、３ａ，３ｂは混合段、４は共通の局部発振段、５ａ，
５ｂは中間周波増中段、６ａ，６ｂは検波段、７は音声
信号切換回路、８ａ，８ｂは中間周波増中部５ａ，５ｂ
に設けられたダイバーシティ制御電圧発生回路、９はこ
れらダイバーシティ制御電圧発生回路８ａ，８ｂからの
出力電圧を比較するための比較回路、１０ａ，１０ｂは
中間周波増中段５ａ，５ｂに設けられた自動選局停止信
号発生回路、１１は自動選局停止信号切換回路である。
以上の構成で、ダイバーシティ制御電圧発生回路８ａ，
８ｂはアンテナｌａ，ｌｂからの受信入力信号レベルお
よびマルチパス歪等に応じた出力電圧を発生し、これら
出力電圧は比較回路９により比較された結果音声信号切
換回路７を受信状態の良好な受信回路系に接続するよう
に働かせる。In the figure, a indicates the a receiving circuit system, b indicates the b receiving circuit system, la and lb are antennas, 2a and 2b are high frequency amplification stages, 3a and 3b are mixing stages, 4 is a common local oscillation stage, 5a,
5b is an intermediate frequency amplification stage, 6a and 6b are detection stages, 7 is an audio signal switching circuit, and 8a and 8b are intermediate frequency amplification parts 5a and 5b.
9 is a comparison circuit for comparing the output voltages from the diversity control voltage generation circuits 8a and 8b, and 10a and 10b are automatic selection circuits provided in the intermediate frequency amplification stages 5a and 5b. The station stop signal generation circuit 11 is an automatic station selection stop signal switching circuit.
With the above configuration, the diversity control voltage generation circuit 8a,
8b generates an output voltage according to the received input signal level from the antennas la and lb, multipath distortion, etc., and these output voltages are compared by a comparator circuit 9, and as a result, the audio signal switching circuit 7 selects a signal with good reception condition. Work to connect to the circuit system.
音声信号切換回路７は例えば第２図のようなＣ−ＭＯＳ
アナログスイッチで構成され、比較回路９からのダイバ
ーシティ切換信号の／・ィレベルあるいはローレベルに
対応して受信回路系ａ，ｂのいずれかを選択する。また
自動選局停止信号発生回路１０ａ，１０ｂは上記ダイバ
ーシティ制御電圧発生回路８ａ，８ｂと同様な出力電圧
を発生し、両出力は自動選局停止信号切換回路１１に加
えられ上記比較回路９からのダイバーシティ切換信号に
よって、いずれかからの自動選局停止信号が出力される
。The audio signal switching circuit 7 is, for example, a C-MOS as shown in FIG.
It is composed of an analog switch, and selects either the receiving circuit system a or b in response to the high level or low level of the diversity switching signal from the comparator circuit 9. Further, the automatic tuning stop signal generation circuits 10a and 10b generate output voltages similar to those of the diversity control voltage generation circuits 8a and 8b, and both outputs are applied to the automatic tuning stop signal switching circuit 11 and output from the comparison circuit 9. Depending on the diversity switching signal, an automatic tuning stop signal is output from one of the channels.
自動選局停止信号切換回路１１は例々えば第２図のよう
なＣ−ＭＯＳアナログスイッチで構成され、上記音声信
号切換回路７と同じような働きをする。ところで第１図
のような従来回路においては、一つの自動選局停止信号
発生回路１０ａ，１０ｂを用意し、これらの出力電圧を
自動選局停止信号切換回路１１においてダイバーシティ
切換信号により切り換えて自動選局停止信号を取り出す
ように構成しているが、各受信系のアンテナに利得差が
あった場合に、利得の低いアンテナに切り換わった時に
は受信電波の極端に弱い放送に対しては選局動作が停止
しないことがあるため、自動選局が確実に行われない欠
点がある。本発明は上記欠点を除去するためなされたも
ので、複数の受信系のうち最もアンテナ利得の高い受信
系のみに自動選局停止信号発生器を設け、自動選局停止
信号をすべての受信系の同調器の局部発振信号発生器へ
加えることにより、確実に自動選局動作を行わせるよう
構成したダイバーシティ受信装置を提供するものである
。The automatic tuning stop signal switching circuit 11 is constituted by, for example, a C-MOS analog switch as shown in FIG. 2, and functions in the same way as the audio signal switching circuit 7 described above. By the way, in the conventional circuit shown in FIG. 1, one automatic tuning stop signal generation circuit 10a, 10b is prepared, and the output voltages of these are switched by the diversity switching signal in the automatic tuning stop signal switching circuit 11 to perform automatic selection. It is configured to extract the station stop signal, but if there is a gain difference between the antennas of each receiving system, when switching to an antenna with a lower gain, it will not be possible to select a station for broadcasts with extremely weak received radio waves. There is a drawback that automatic channel selection cannot be performed reliably because the system may not stop. The present invention has been made in order to eliminate the above-mentioned drawbacks, and is provided with an automatic tuning stop signal generator only in the receiving system with the highest antenna gain among the plurality of receiving systems, and transmits the automatic tuning stop signal to all the receiving systems. The present invention provides a diversity receiving device configured to reliably perform automatic channel selection by adding the signal to a local oscillation signal generator of a tuner.
以下第３図を参照して本発明実施例を説明する。第３図
において第１図と同一部分は同一番号で示しており、本
発明実施例においては、自動選局停止信号発生回路１川
ま複数の受信系のうち最もアンテナ利得の高い受信系、
例えばａ受信系の中間周波増中段５ａに設けられる。以
上の横成で、比較回路９から出力されたダイバーシティ
切換信号は音声信号切換回路７のみを切り換えるように
動作する。An embodiment of the present invention will be described below with reference to FIG. In FIG. 3, parts that are the same as those in FIG.
For example, it is provided in the intermediate frequency amplification stage 5a of the a receiving system. With the above configuration, the diversity switching signal output from the comparator circuit 9 operates to switch only the audio signal switching circuit 7.
また自動選局停止信号は一つの自動選局停止信号発生回
路１０から取り出され、上記共通の局部発振段に加えら
れる。以上のように最もアンテナ利得の高い受信系に自
動選局停止信号発生回路を設け、発生された自動選局停
止信号を共通の局部発振段に入力させることにより、利
得の低いアンテナに切り換った時でも自動選局停止信号
発生回路１０からは最適の停止信号が発生されるので、
確実に自動選局が行えるようになる。また複数の受信系
のアンテナの利得がほぼ等しい場合にも、一つの自動選
局停止信号発生回路を設けるだけで上記同様な結果が得
られる。Further, the automatic tuning stop signal is taken out from one automatic tuning stop signal generation circuit 10 and applied to the common local oscillation stage. As described above, by providing an automatic tuning stop signal generation circuit in the receiving system with the highest antenna gain and inputting the generated automatic tuning stop signal to a common local oscillation stage, it is possible to switch to an antenna with a lower gain. Even when the automatic tuning stop signal generation circuit 10 generates the optimum stop signal,
Automatic channel selection can be performed reliably. Further, even when the gains of the antennas of a plurality of reception systems are approximately equal, the same result as described above can be obtained by simply providing one automatic tuning stop signal generation circuit.
以上のように本発明によれば、複数の受信系のうち最も
アンテナ利得の高い受信系のみに自動選局停止発生器を
設け、自動選局停止信号をすべての受信系の同調器の局
部発振信号発生器へ加えるように構成したので、利得の
低いアンテナに切り換った時受信電波の極端に弱い放送
に対しても選局動作を停止させることができるようにな
り、自動選局が確実に行われる。As described above, according to the present invention, the automatic tuning stop generator is provided only in the receiving system with the highest antenna gain among the plurality of receiving systems, and the automatic tuning stop signal is transmitted to the local oscillator of the tuner of all the receiving systems. Since it is configured to be added to the signal generator, when switching to a low-gain antenna, it is possible to stop the tuning operation even for broadcasts with extremely weak received radio waves, ensuring automatic tuning. It will be held in
また自動選局停止信号発生回路を最もアンテナ利得の高
い受信系のみに対して一つだけ設ければ良いので回路方
式も簡単にすることができる。Further, since only one automatic tuning stop signal generation circuit needs to be provided only for the receiving system with the highest antenna gain, the circuit system can be simplified.
第１図および第２図は共に従来例を示すブロック図およ
び回路図、第３図は本発明実施例を示すブロック図であ
る。
５ａ，５ｂ・・・・・・中間周波増中段、７・・・・・
・音声信号切換回路、８ａ，８ｂ・・…・ダイバーシテ
ィ制御電圧発生回路、９・・・・・・比較回路、１０，
１０ａ，１０ｂ・・・・・・自動選局停止信号発生回路
、１１・・・・・・自動選局停止債号切換回路。
纂１図
繁２図
嫌３母1 and 2 are both a block diagram and a circuit diagram showing a conventional example, and FIG. 3 is a block diagram showing an embodiment of the present invention. 5a, 5b...Intermediate frequency increase middle stage, 7...
- Audio signal switching circuit, 8a, 8b... Diversity control voltage generation circuit, 9... Comparison circuit, 10,
10a, 10b...Automatic channel selection stop signal generation circuit, 11...Automatic channel selection stop bond switching circuit. 1st drawing 2nd drawing 3rd mother
Claims (1)
の最も少ない受信系を選択して該受信系へ順次切り換え
る手段と、上記複数の受信系のうち最もアンテナ利得の
高い受信系の中間周波増巾部に接続した自動選局停止信
号発生器と、該自動選局停止信号発生器から発生した自
動選局停止信号をすべての受信系の同調器へ局部発振信
号を供給する局部発振信号発生器へ入力させる手段、と
を含むことを特徴とするダイバーシテイ受信装置。1. Means for selecting a receiving system with the least noise component from the received waves received by each of the plurality of receiving systems and sequentially switching to the receiving system, and an intermediate frequency of the receiving system having the highest antenna gain among the plurality of receiving systems. An automatic tuning stop signal generator connected to the amplifying section, and a local oscillation signal generator that supplies the automatic tuning stop signal generated from the automatic tuning stop signal generator to the tuners of all reception systems. 1. A diversity receiving device comprising: means for inputting data to a receiver.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56178117A JPS6019174B2 (en) | 1981-11-06 | 1981-11-06 | Diversity receiving device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56178117A JPS6019174B2 (en) | 1981-11-06 | 1981-11-06 | Diversity receiving device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57150242A JPS57150242A (en) | 1982-09-17 |
| JPS6019174B2 true JPS6019174B2 (en) | 1985-05-15 |
Family
ID=16042950
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56178117A Expired JPS6019174B2 (en) | 1981-11-06 | 1981-11-06 | Diversity receiving device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6019174B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60138284U (en) * | 1984-02-25 | 1985-09-12 | 株式会社サンコ−シャ | Lightning arrester retainer and terminal device |
-
1981
- 1981-11-06 JP JP56178117A patent/JPS6019174B2/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60138284U (en) * | 1984-02-25 | 1985-09-12 | 株式会社サンコ−シャ | Lightning arrester retainer and terminal device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57150242A (en) | 1982-09-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4592093A (en) | Super high frequency receiver | |
| EP0829133B1 (en) | Agc circuit arrangement for a tuner | |
| US5014349A (en) | Television tuner for common use in BS/UV | |
| EP0429021B1 (en) | A receiver capable of quickly suppressing defective effect of multipath reflection interference | |
| US3541451A (en) | Variable center frequency filter for frequency modulation receiver | |
| EP1184974A2 (en) | Antenna unit and receiving circuit | |
| EP0668656B1 (en) | A tuner for a satellite broadcasting receiver | |
| KR100211620B1 (en) | First IF filter with fixed second half-IF trap used for FM radio in television receiver | |
| JPS6019174B2 (en) | Diversity receiving device | |
| GB2052902A (en) | Radio receivers | |
| US5303410A (en) | Signal strength meter circuit for radio receiver | |
| JPS6221417B2 (en) | ||
| US3548315A (en) | Compensated vhf-uhf automatic gain control delay system | |
| US7899141B2 (en) | Receiver for receiving radio frequency signals | |
| KR200203700Y1 (en) | A tuner of digital satellite broadcasting reception | |
| JPH0730301A (en) | Satellite broadcast receiver | |
| JPH0423849B2 (en) | ||
| JP2788583B2 (en) | Receiving machine | |
| JPH062354Y2 (en) | Diversity receiver | |
| JP3143393B2 (en) | AM radio receiver | |
| JPS6322739B2 (en) | ||
| JPH0779171A (en) | Receiver | |
| JPS6367778B2 (en) | ||
| JP2513114B2 (en) | Satellite communication receiver | |
| JPH05304640A (en) | Television receiver |