JPS6217234U - - Google Patents
Info
- Publication number
- JPS6217234U JPS6217234U JP10911485U JP10911485U JPS6217234U JP S6217234 U JPS6217234 U JP S6217234U JP 10911485 U JP10911485 U JP 10911485U JP 10911485 U JP10911485 U JP 10911485U JP S6217234 U JPS6217234 U JP S6217234U
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- intermediate frequency
- tuning voltage
- controlled
- variable 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
- 239000004065 semiconductor Substances 0.000 claims description 5
- 238000001514 detection method Methods 0.000 claims description 4
- 230000010355 oscillation Effects 0.000 claims description 4
- 230000003321 amplification Effects 0.000 claims 3
- 238000003199 nucleic acid amplification method Methods 0.000 claims 3
- 230000007423 decrease Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 3
Landscapes
- Channel Selection Circuits, Automatic Tuning Circuits (AREA)
Description
第１図は本考案の受信機のＡＦＣ回路図、第２
図は従来の受信機のＡＦＣ回路図である。
主な図番の説明、１２…高周波増幅回路、１４
…半導体可変容量素子、１５…同調回路、１６…
混合回路、１７…局部発振回路、１９…半導体可
変容量素子、２０…同調回路、２１…チユーニン
グ回路、２７…ＦＭ検波回路、２８…制御トラン
ジスタ。
Figure 1 is the AFC circuit diagram of the receiver of the present invention, Figure 2 is the AFC circuit diagram of the receiver of the present invention.
The figure is an AFC circuit diagram of a conventional receiver. Explanation of main drawing numbers, 12...High frequency amplifier circuit, 14
...Semiconductor variable capacitance element, 15...Tuning circuit, 16...
Mixing circuit, 17... Local oscillation circuit, 19... Semiconductor variable capacitance element, 20... Tuning circuit, 21... Tuning circuit, 27... FM detection circuit, 28... Control transistor.
Claims (1)
ニング電圧にて容量が制御され同調周波数を変化
させる半導体可変容量素子を有する高周波増幅回
路と、前記チユーニング電圧にて容量が制御され
発振周波数を変化させる半導体可変容量素子を含
む局部発振回路と、前記高周波増幅回路で受信さ
れた放送信号と局部発振回路よりの局部発振信号
とを混合し中間周波信号を発生させる混合回路と
、前記中間周波信号を増幅する中間周波増幅回路
と、該中間周波増幅回路よりの中間周波信号をＦ
Ｍ検波するＦＭ検波回路と、該ＦＭ検波回路より
検出されるＡＦＣ電圧によつて制御され前記各半
導体可変容量素子に供給されるチユーニング電圧
を増減させる制御トランジスタとよりなる受信機
のＡＦＣ回路。 A high frequency amplifier circuit having a semiconductor variable capacitance element whose capacitance is controlled by a tuning voltage generated by a tuning voltage generator and whose tuning frequency is changed; and a semiconductor variable capacitance element whose capacitance is controlled by the tuning voltage and which changes its oscillation frequency. a mixing circuit that mixes the broadcast signal received by the high frequency amplification circuit with a local oscillation signal from the local oscillation circuit to generate an intermediate frequency signal, and an intermediate frequency amplification circuit that amplifies the intermediate frequency signal. circuit, and the intermediate frequency signal from the intermediate frequency amplification circuit is F.
An AFC circuit of a receiver comprising an FM detection circuit for performing M detection, and a control transistor that is controlled by an AFC voltage detected by the FM detection circuit and increases/decreases a tuning voltage supplied to each of the semiconductor variable capacitance elements.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10911485U JPS6217234U (en) | 1985-07-17 | 1985-07-17 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10911485U JPS6217234U (en) | 1985-07-17 | 1985-07-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6217234U true JPS6217234U (en) | 1987-02-02 |
Family
ID=30986923
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10911485U Pending JPS6217234U (en) | 1985-07-17 | 1985-07-17 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6217234U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5426617A (en) * | 1977-08-01 | 1979-02-28 | Pioneer Electronic Corp | Afc circuit for receiver |
-
1985
- 1985-07-17 JP JP10911485U patent/JPS6217234U/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5426617A (en) * | 1977-08-01 | 1979-02-28 | Pioneer Electronic Corp | Afc circuit for receiver |
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