JPH02897B2 - - Google Patents
Info
- Publication number
- JPH02897B2 JPH02897B2 JP10410484A JP10410484A JPH02897B2 JP H02897 B2 JPH02897 B2 JP H02897B2 JP 10410484 A JP10410484 A JP 10410484A JP 10410484 A JP10410484 A JP 10410484A JP H02897 B2 JPH02897 B2 JP H02897B2
- Authority
- JP
- Japan
- Prior art keywords
- receiving
- receiving system
- circuit
- oscillator
- frequency
- 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
- 230000010355 oscillation Effects 0.000 description 9
- 238000001514 detection method Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 4
- 230000003321 amplification Effects 0.000 description 3
- 238000003199 nucleic acid amplification method Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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)
- Circuits Of Receivers In General (AREA)
Description
【発明の詳細な説明】
〔発明の利用分野〕
本発明は二つの受信系を備える受信機に関す
る。DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a receiver having two receiving systems.
同一内容局や交通情報局の探索のために、二つ
の受信系を備えた受信系は公知である。第２図は
このような受信機の構成を示すブロツク図で、図
中１はアンテナ、２は分配器、３ａ，３ｂは高周
波増幅回路、４ａ，４ｂは混合回路、５ａ，５ｂ
は中間周波増幅回路、６ａ，６ｂは局部発振回
路、７ａ，７ｂはPLL回路、８ａ，８ｂは低域
通過フイルタ回路、９ａは第１の受信系、９ｂは
第２の受信系、１０は制御回路である。
A receiving system having two receiving systems for searching for the same content station or traffic information station is publicly known. Figure 2 is a block diagram showing the configuration of such a receiver, in which 1 is an antenna, 2 is a distributor, 3a, 3b are high frequency amplifier circuits, 4a, 4b are mixing circuits, 5a, 5b
6a and 6b are intermediate frequency amplifier circuits, 6a and 6b are local oscillation circuits, 7a and 7b are PLL circuits, 8a and 8b are low-pass filter circuits, 9a is a first receiving system, 9b is a second receiving system, and 10 is a control It is a circuit.
このような受信機は、例えば受信系９ａがある
周波数を受信しているときに、受信系９ｂは所定
の目的を持つて帯域内を探索するものであるが、
この動作を停止させ、二つの受信系９ａおよび９
ｂが同一の周波数を受信するようにし、さらにマ
ルチパス検出、比較および切換え回路を追加すれ
ば、ダイバシテイ受信機として動作させることが
理論上可能となる。 In such a receiver, for example, when the receiving system 9a is receiving a certain frequency, the receiving system 9b searches within the band with a predetermined purpose.
This operation is stopped and the two receiving systems 9a and 9
It is theoretically possible to operate the receiver as a diversity receiver by making sure that receivers b receive the same frequency and adding multipath detection, comparison, and switching circuits.
ところが実際には、局部発振回路６ａと６ｂに
用いられる可変容量ダイオード素子の特性にはば
らつきがあり、二つの局部発振周波数が完全に一
致することはあり得ず、その差がビートとなつて
音声出力に妨害を与えるという不都合がある。 However, in reality, there are variations in the characteristics of the variable capacitance diode elements used in the local oscillation circuits 6a and 6b, and it is impossible for the two local oscillation frequencies to completely match, and the difference becomes the beat and produces the sound. This has the disadvantage of interfering with the output.
本発明の目的は、同一内容局や交通情報局の探
索のために二つの受信系を備えた受信機において
それらの機能の動作を停止させたときに、ダイバ
シテイ受信機として動作させることができる受信
機を提供することである。
An object of the present invention is to provide a receiver that can be operated as a diversity receiver when the functions of the receiver are stopped in order to search for the same content station or traffic information station. The goal is to provide opportunities.
上記目的を達成するために、本発明による受信
機は第１の受信系および第２の受信系を有し、上
記第１の受信系の受信周波数を決定する第１の発
振器と、上記第２の受信系の受信周波数を決定す
る第２の発振器と、を備え、上記第２の受信系の
受信周波数を決定するための第２の発振器出力を
遮断すると共に第１の発振器出力を第２の受信系
に供給せしめる選択手段を設け、互いに異なる二
つの周波数を受信する場合には、上記第１の発振
器ならびに第２の発振器出力を各受信系で独立に
用い、他方、同一の周波数を受信する場合には、
上記選択手段によつて上記第１の発振器出力を各
受信系で共用せしめることを要旨する。
In order to achieve the above object, a receiver according to the present invention has a first receiving system and a second receiving system, a first oscillator that determines the reception frequency of the first receiving system, and a first oscillator that determines the reception frequency of the first receiving system, a second oscillator that determines the receiving frequency of the receiving system, the second oscillator output for determining the receiving frequency of the second receiving system is cut off, and the first oscillator output is transmitted to the second oscillator. When receiving two different frequencies by providing a selection means for supplying the signals to the receiving system, each receiving system uses the first oscillator and the second oscillator output independently, while receiving the same frequency. in case of,
The gist is that the first oscillator output is shared by each receiving system by the selection means.
以下に、図面を参照しながら、実施例を用いて
本発明を一層詳細に説明するが、それらは例示に
過ぎず、本発明の枠を越えることなしにいろいろ
な変形や改良があり得ることは勿論である。 Hereinafter, the present invention will be explained in more detail using examples with reference to the drawings, but these are merely illustrative and it is understood that various modifications and improvements may be made without going beyond the scope of the present invention. Of course.
第１図は本発明による受信機の構成を示すブロ
ツク図で、図中第２図と共通する引用番号は第２
図におけるものと同じ部分を表わし、１ａおよび
１ｂは受信系それぞれ９ａおよび９ｂのアンテ
ナ、１１ａ，１１ｂは検波回路、１２はマルチパ
ス検出、比較回路、１３，１４は切換え回路、１
５は低周波増幅回路、１６はスピーカである。な
お、切換え回路１４は後述の如く前記選択手段に
対応する。
FIG. 1 is a block diagram showing the configuration of a receiver according to the present invention, and reference numbers common to those in FIG.
1a and 1b represent the antennas of the receiving system 9a and 9b, respectively, 11a and 11b are detection circuits, 12 is a multipath detection and comparison circuit, 13 and 14 are switching circuits, 1
5 is a low frequency amplifier circuit, and 16 is a speaker. Note that the switching circuit 14 corresponds to the selection means as described later.
第１図に示す受信機はつぎのように動作する。
同一内容局が交通情報局の探索等の動作の場合に
は、制御回路１０は切換え回路１４に対してＡ側
を選択するように出力し、マルチパス検出、比較
回路１２に対してはその動作を停止させ、切換え
回路１３にＡ側を選択させる。したがつて、受信
系９ａはある周波数を受信する系として、また受
信系９ｂは帯域内を前記の目的のために走査する
系として動作する。この場合、受信系９ａと９ｂ
は互に独立である。 The receiver shown in FIG. 1 operates as follows.
When the same content station performs an operation such as searching for a traffic information station, the control circuit 10 outputs an output to the switching circuit 14 to select side A, and the multipath detection/comparison circuit 12 outputs the operation. is stopped, and the switching circuit 13 is made to select the A side. Therefore, the receiving system 9a operates as a system for receiving a certain frequency, and the receiving system 9b operates as a system for scanning the band for the above-mentioned purpose. In this case, receiving systems 9a and 9b
are independent of each other.
一方、ダイバシテイ受信機としての動作の場合
には、制御回路１０は切換え回路１２に対してＢ
側を選択するように出力し、マルチパス検出、比
較回路１２を動作させ、切換え回路１３にはマル
チパス妨害が少ない受信系を選択するように出力
する。したがつて、受信系９ｂの混合回路４ｂに
は受信系９ａの局部発振回路６ａの出力が入力さ
れ、受信系９ａおよび９ｂは同一の周波数を受信
し、かつマルチパスの少ない側の音声を切換え回
路１３および低周波増幅回路１５を通してスピー
カ１６から出力することになる。この場合、受信
系９ｂは受信系９ａのPLL制御にしたがうこと
になる。なお、このとき局部増幅回路６ｂの発振
を停止させるために、その供給電圧を遮断する
か、またはその発振周波数が局部発振回路６ａの
発振周波数、および受信系９ａおよび９ｂの受信
周波数の近傍にならないように、制御回路１０が
PLL回路７ｂに必要なデータを出力しなければ
ならない。 On the other hand, in the case of operation as a diversity receiver, the control circuit 10 provides B to the switching circuit 12.
The multipath detection/comparison circuit 12 is operated, and the switching circuit 13 is outputted to select a receiving system with less multipath interference. Therefore, the output of the local oscillation circuit 6a of the receiving system 9a is input to the mixing circuit 4b of the receiving system 9b, and the receiving systems 9a and 9b receive the same frequency and switch the audio on the side with less multipath. The signal is output from the speaker 16 through the circuit 13 and the low frequency amplification circuit 15. In this case, the receiving system 9b follows the PLL control of the receiving system 9a. At this time, in order to stop the oscillation of the local amplifier circuit 6b, the supply voltage must be cut off, or the oscillation frequency must not be close to the oscillation frequency of the local oscillation circuit 6a and the receiving frequencies of the receiving systems 9a and 9b. As such, the control circuit 10
Necessary data must be output to the PLL circuit 7b.
以上説明した通り、本発明によれば、二つの受
信系を備えた受信機において、互いに異なる二つ
の周波数を受信することも、同一の周波数を受信
することも可能となるので、二つの受信系を備え
ることに伴うコストの上昇分を機能の多様化によ
つて相対的に下げることができる。
As explained above, according to the present invention, in a receiver equipped with two receiving systems, it is possible to receive two different frequencies or to receive the same frequency. It is possible to relatively reduce the increase in cost associated with having a system by diversifying its functions.
第１図は本発明による受信機の構成を示すブロ
ツク図、第２図は二つの受信系を備える従来の受
信機の構成を示すブロツク図である。
１，１ａ，１ｂ……アンテナ、２……分配器、
３ａ，３ｂ……高周波増幅回路、４ａ，４ｂ……
混合回路、５ａ，５ｂ……中間周波増幅回路、６
ａ，６ｂ……局部発振回路、７ａ，７ｂ……
PLL回路、８ａ，８ｂ……低域通過フイルタ回
路、９ａ……第１の受信系、９ｂ……第２の受信
系、１０……制御回路、１１ａ，１１ｂ……検波
回路、１２……マルチパス検出、比較回路、１
３，１４……切換え回路、１５……低周波増幅回
路。
FIG. 1 is a block diagram showing the configuration of a receiver according to the present invention, and FIG. 2 is a block diagram showing the configuration of a conventional receiver having two receiving systems. 1, 1a, 1b... antenna, 2... distributor,
3a, 3b...high frequency amplifier circuit, 4a, 4b...
Mixing circuit, 5a, 5b...Intermediate frequency amplification circuit, 6
a, 6b...Local oscillation circuit, 7a, 7b...
PLL circuit, 8a, 8b...Low pass filter circuit, 9a...First receiving system, 9b...Second receiving system, 10...Control circuit, 11a, 11b...Detection circuit, 12...Multiple Path detection, comparison circuit, 1
3, 14...Switching circuit, 15...Low frequency amplification circuit.
Claims (1)
信機において、 上記第１の受信系の受信周波数を決定する第１
の発振器と、上記第２の受信系の受信周波数を決
定する第２の発振器と、を備え、 上記第２の受信系の受信周波数を決定するため
の第２の発振器出力を遮断すると共に第１の発振
器出力を第２の受信系に供給せしめる選択手段を
設け、互いに異なる二つの周波数を受信する場合
には、上記第１の発振器ならびに第２の発振器出
力を各受信系で独立に用い、他方、同一の周波数
を受信する場合には、上記選択手段によつて上記
第１の発振器出力を各受信系で共用せしめること
を特徴とする受信機。[Claims] 1. In a receiver having a first receiving system and a second receiving system, a first receiving system that determines the receiving frequency of the first receiving system.
and a second oscillator that determines the reception frequency of the second reception system, and cuts off the second oscillator output for determining the reception frequency of the second reception system and the first oscillator. oscillator output to the second receiving system, and when receiving two mutually different frequencies, the first oscillator and second oscillator outputs are used independently in each receiving system, and the other . A receiver characterized in that, when receiving the same frequency, the first oscillator output is shared by each receiving system by the selecting means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10410484A JPS60248026A (en) | 1984-05-23 | 1984-05-23 | Receiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10410484A JPS60248026A (en) | 1984-05-23 | 1984-05-23 | Receiver |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60248026A JPS60248026A (en) | 1985-12-07 |
| JPH02897B2 true JPH02897B2 (en) | 1990-01-09 |
Family
ID=14371808
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10410484A Granted JPS60248026A (en) | 1984-05-23 | 1984-05-23 | Receiver |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60248026A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01120133A (en) * | 1987-11-02 | 1989-05-12 | Mazda Motor Corp | Receiver for vehicle |
| DE102004041244A1 (en) * | 2004-08-26 | 2006-03-02 | Robert Bosch Gmbh | Radio receiver |
| JP4881495B2 (en) * | 2007-01-22 | 2012-02-22 | シンクレイヤ株式会社 | Notification broadcasting system and receiving terminal device |
| JP2009027745A (en) * | 2008-09-25 | 2009-02-05 | Texas Instr Japan Ltd | Tuner semiconductor device and diversity receiver |
-
1984
- 1984-05-23 JP JP10410484A patent/JPS60248026A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60248026A (en) | 1985-12-07 |
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