JPS6242332U - - Google Patents
Info
- Publication number
- JPS6242332U JPS6242332U JP13164185U JP13164185U JPS6242332U JP S6242332 U JPS6242332 U JP S6242332U JP 13164185 U JP13164185 U JP 13164185U JP 13164185 U JP13164185 U JP 13164185U JP S6242332 U JPS6242332 U JP S6242332U
- Authority
- JP
- Japan
- Prior art keywords
- oscillator
- output
- voltage controlled
- programmable counter
- phase
- 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
- 238000001514 detection method Methods 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 1
Landscapes
- Channel Selection Circuits, Automatic Tuning Circuits (AREA)
- Superheterodyne Receivers (AREA)
Description
第１図はこの考案の実施例を示したブロツクダ
イヤフラム、第２図は受信周波数領域を示した特
性図、第３図はマイクロプロセツサの動作を示す
フローチヤートである。
１……高周波増幅器、２……ミキサ、３……中
間周波数増幅器、４……検波回路、５……電圧制
御発振器、６……プリスケーラ、７……プログラ
マブルカウンタ、８……Ｎ可変回路、９……位相
比較器、１０……基準信号発振器、１１……分周
器、１２……ローパスフイルタ、１３……マイク
ロプロセツサ、１４……メモリ、１５，１６，１
７……操作釦。
FIG. 1 is a block diaphragm showing an embodiment of this invention, FIG. 2 is a characteristic diagram showing the receiving frequency region, and FIG. 3 is a flowchart showing the operation of the microprocessor. DESCRIPTION OF SYMBOLS 1... High frequency amplifier, 2... Mixer, 3... Intermediate frequency amplifier, 4... Detection circuit, 5... Voltage controlled oscillator, 6... Prescaler, 7... Programmable counter, 8... N variable circuit, 9 ... Phase comparator, 10 ... Reference signal oscillator, 11 ... Frequency divider, 12 ... Low pass filter, 13 ... Microprocessor, 14 ... Memory, 15, 16, 1
7...Operation button.
Claims (1)
検波回路を具備し、上記ミキサに対しローカル信
号発振器からの信号を注入するようにしたスーパ
ヘテロダイン受信機において、 上記ローカル信号発振器は電圧制御発振器と、
この電圧制御発振器の出力周波数ｆを可変値Ｎに
よつて割算するプログラマブルカウンタと、この
プログラマブルカウンタの出力と基準発振器の出
力との位相を比較する位相比較器とを少なくとも
備え、この位相比較器の比較出力を上記電圧制御
発振器の制御入力信号としたフエーズロツクドル
ープにより構成され、 上記プログラマブルカウンタにおける割算係数
Ｎの可変領域を同一バンド内の特定の周波数範囲
内のみを順次掃引されるように設定可能としたこ
とを特徴とするスーパヘテロダイン受信機。[Claims for Utility Model Registration] In a superheterodyne receiver that is equipped with a high frequency amplifier, a mixer, an intermediate frequency amplifier, and a detection circuit, and in which a signal from a local signal oscillator is injected into the mixer, the local signal oscillator is a voltage controlled oscillator;
The phase comparator includes at least a programmable counter that divides the output frequency f of the voltage controlled oscillator by a variable value N, and a phase comparator that compares the phase of the output of the programmable counter and the output of the reference oscillator. A phase-locked loop whose comparison output is used as a control input signal for the voltage controlled oscillator is used, and the variable range of the division coefficient N in the programmable counter is sequentially swept only within a specific frequency range within the same band. A superheterodyne receiver characterized by being able to be set to
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13164185U JPS6242332U (en) | 1985-08-30 | 1985-08-30 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13164185U JPS6242332U (en) | 1985-08-30 | 1985-08-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6242332U true JPS6242332U (en) | 1987-03-13 |
Family
ID=31030284
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13164185U Pending JPS6242332U (en) | 1985-08-30 | 1985-08-30 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6242332U (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5625821A (en) * | 1979-08-03 | 1981-03-12 | Fujitsu Ten Ltd | Multiple-band radio receiver |
| JPS58206224A (en) * | 1982-05-26 | 1983-12-01 | Sanyo Electric Co Ltd | Receiving device |
-
1985
- 1985-08-30 JP JP13164185U patent/JPS6242332U/ja active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5625821A (en) * | 1979-08-03 | 1981-03-12 | Fujitsu Ten Ltd | Multiple-band radio receiver |
| JPS58206224A (en) * | 1982-05-26 | 1983-12-01 | Sanyo Electric Co Ltd | Receiving device |
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