JPH0348940U - - Google Patents
Info
- Publication number
- JPH0348940U JPH0348940U JP11063889U JP11063889U JPH0348940U JP H0348940 U JPH0348940 U JP H0348940U JP 11063889 U JP11063889 U JP 11063889U JP 11063889 U JP11063889 U JP 11063889U JP H0348940 U JPH0348940 U JP H0348940U
- Authority
- JP
- Japan
- Prior art keywords
- variable
- variable capacitance
- circuit
- frequency
- capacitance
- 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
- 230000010355 oscillation Effects 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Superheterodyne Receivers (AREA)
- Circuits Of Receivers In General (AREA)
Description
第１図は本考案の一実施例の受信装置を説明す
るためのブロツク図、第２図は従来の受信装置を
説明するためのブロツク図である。
１１……アンテナ、１２……第１の局部発振器
、１３……第１の混合器、１４……第２の局部発
振器、１５……第２の混合器、１６……可変容量
ダイオード、１７……Ｄ／Ａコンバータ、１８…
…Ｅ２ＰＲＯＭ、１９……ＣＰＵ、２０……周波
数調整用のアンテナ、２１……周波数カウンタ、
２２……マイコン。
FIG. 1 is a block diagram for explaining a receiving apparatus according to an embodiment of the present invention, and FIG. 2 is a block diagram for explaining a conventional receiving apparatus. 11... Antenna, 12... First local oscillator, 13... First mixer, 14... Second local oscillator, 15... Second mixer, 16... Variable capacitance diode, 17... ...D/A converter, 18...
... E2 PROM, 19...CPU, 20...Antenna for frequency adjustment, 21...Frequency counter,
22...Microcomputer.
Claims (1)
れる周波数信号を出力する局部発振器と、 この局部発振器の周波数を可変させる可変容量
素子と、 この可変容量素子の容量を可変させる発振周波
数可変回路と、 前記局部発振器からの周波数が、予め設定され
た所定の周波数となる前記発振周波数可変回路に
出力される外部からの可変容量設定信号を記憶す
る記憶回路と、 この記憶回路に記憶された可変容量設定信号に
応じて前記発振周波数可変回路を制御する制御回
路と を具備することを特徴とする受信装置。[Claims for Utility Model Registration] A mixer that inputs a received signal from an antenna; a local oscillator that outputs a frequency signal to be mixed with the received signal that is input to the mixer; and a variable frequency of the local oscillator. a variable capacitance element that varies the capacitance of the variable capacitance element; and a variable oscillation frequency circuit that varies the capacitance of the variable capacitance element; A receiving device comprising: a storage circuit that stores a variable capacitance setting signal; and a control circuit that controls the oscillation frequency variable circuit according to the variable capacitance setting signal stored in the storage circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11063889U JPH0348940U (en) | 1989-09-20 | 1989-09-20 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11063889U JPH0348940U (en) | 1989-09-20 | 1989-09-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0348940U true JPH0348940U (en) | 1991-05-13 |
Family
ID=31659162
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11063889U Pending JPH0348940U (en) | 1989-09-20 | 1989-09-20 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0348940U (en) |
-
1989
- 1989-09-20 JP JP11063889U patent/JPH0348940U/ja active Pending
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