JPS63178971U - - Google Patents
Info
- Publication number
- JPS63178971U JPS63178971U JP1987071183U JP7118387U JPS63178971U JP S63178971 U JPS63178971 U JP S63178971U JP 1987071183 U JP1987071183 U JP 1987071183U JP 7118387 U JP7118387 U JP 7118387U JP S63178971 U JPS63178971 U JP S63178971U
- Authority
- JP
- Japan
- Prior art keywords
- tuning
- coil
- input terminal
- capacitance diode
- 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.)
- Granted
Links
- 239000003990 capacitor Substances 0.000 claims description 3
- 230000000903 blocking effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 9
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
Description
第１図は本考案の一実施例の電子同調チユーナ
の同調回路を示す回路図、第２図は第１図の回路
を印刷配線板上に形成した場合の回路パターン構
成を説明する説明図、第３図は第２図についての
ＶＨＦロー、ハイ、スーパーの各バンド受信時に
おける等価回路図、第４図は電子同調チユーナの
全体構成を説明するブロツク図、第５図は第４図
のチユーナに使用される複同調回路の従来例を示
す回路図、第６図は結合容量として可変容量ダイ
オードを使用した場合における第５図の１次側同
調回路を示す回路図、第７図は第６図の回路を印
刷配線板上に形成した場合の回路パターン構成を
説明する説明図、第８図は第７図についてのＶＨ
Ｆロー、ハイ、スーパーの各バンド受信時におけ
る等価回路図である。
６１……同調用可変容量ダイオード、６２……
結合用可変容量ダイオード、６３……抵抗、６４
，７２……コンデンサ、６５，６６，６７……同
調コイル。
1 is a circuit diagram showing a tuning circuit of an electronic tuning tuner according to an embodiment of the present invention; FIG. 2 is an explanatory diagram illustrating a circuit pattern configuration when the circuit of FIG. 1 is formed on a printed wiring board; Fig. 3 is an equivalent circuit diagram of Fig. 2 when receiving VHF low, high, and super bands, Fig. 4 is a block diagram explaining the overall configuration of an electronically tuned tuner, and Fig. 5 is a block diagram of the tuner shown in Fig. 4. 6 is a circuit diagram showing a conventional example of a double tuning circuit used in a double tuning circuit, FIG. 6 is a circuit diagram showing a primary side tuning circuit of FIG. An explanatory diagram illustrating the circuit pattern configuration when the circuit shown in the figure is formed on a printed wiring board, Figure 8 is a VH for Figure 7.
FIG. 4 is an equivalent circuit diagram when receiving F low, high, and super bands. 61... Tuning variable capacitance diode, 62...
Coupling variable capacitance diode, 63...Resistance, 64
, 72... Capacitor, 65, 66, 67... Tuning coil.
Claims (1)
力される入力端子と、 この入力端子と基準電位点間に接続され、同調
電圧の印加によつて容量値が可変とされる第１の
可変容量ダイオードと、 この第１の可変容量ダイオードと共に同調回路
を構成するものであつて、バンド切換えを可能と
すべく、複数個のコイルを直列接続して成る同調
用コイルと、 前記入力端子と前記同調用コイルの一端との間
に接続され、前記と同じ同調電圧の印加によつて
容量値が可変とされる第２の可変容量ダイオード
と、 前記同調用コイルの一端にある第１のコイルと
これに接続した第２のコイルとの間に設けられる
直流阻止用のコンデンサと、 このコンデンサと前記第１のコイルの接続点と
基準電位点との間に設けられた抵抗とを具備した
ことを特徴とする電子同調チユーナの同調回路。[Claims for Utility Model Registration] An input terminal into which a signal whose frequency changes depending on the channel is input, and an input terminal connected between this input terminal and a reference potential point, whose capacitance value is made variable by applying a tuning voltage. a first variable capacitance diode that constitutes a tuning circuit together with the first variable capacitance diode, and a tuning coil formed by connecting a plurality of coils in series to enable band switching; a second variable capacitance diode connected between the input terminal and one end of the tuning coil, the capacitance of which can be varied by applying the same tuning voltage as above; and a second variable capacitance diode located at one end of the tuning coil. A DC blocking capacitor provided between a first coil and a second coil connected thereto, and a resistor provided between a connection point between this capacitor and the first coil and a reference potential point. A tuning circuit for an electronic tuning tuner, characterized by comprising:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987071183U JPH0631817Y2 (en) | 1987-05-12 | 1987-05-12 | Tuning circuit of electronic tuning tuner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987071183U JPH0631817Y2 (en) | 1987-05-12 | 1987-05-12 | Tuning circuit of electronic tuning tuner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63178971U true JPS63178971U (en) | 1988-11-18 |
| JPH0631817Y2 JPH0631817Y2 (en) | 1994-08-22 |
Family
ID=30913506
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987071183U Expired - Lifetime JPH0631817Y2 (en) | 1987-05-12 | 1987-05-12 | Tuning circuit of electronic tuning tuner |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0631817Y2 (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS577617A (en) * | 1980-06-16 | 1982-01-14 | Matsushita Electric Ind Co Ltd | Electronic tuner |
| JPS5895418A (en) * | 1981-12-01 | 1983-06-07 | Matsushita Electric Ind Co Ltd | Electronic tuning tuner |
| JPS5895419A (en) * | 1981-12-01 | 1983-06-07 | Matsushita Electric Ind Co Ltd | Electronic tuning tuner |
| JPS61145977A (en) * | 1984-12-20 | 1986-07-03 | Sony Corp | Oscillating circuit |
| JPS625722U (en) * | 1985-06-27 | 1987-01-14 |
-
1987
- 1987-05-12 JP JP1987071183U patent/JPH0631817Y2/en not_active Expired - Lifetime
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS577617A (en) * | 1980-06-16 | 1982-01-14 | Matsushita Electric Ind Co Ltd | Electronic tuner |
| JPS5895418A (en) * | 1981-12-01 | 1983-06-07 | Matsushita Electric Ind Co Ltd | Electronic tuning tuner |
| JPS5895419A (en) * | 1981-12-01 | 1983-06-07 | Matsushita Electric Ind Co Ltd | Electronic tuning tuner |
| JPS61145977A (en) * | 1984-12-20 | 1986-07-03 | Sony Corp | Oscillating circuit |
| JPS625722U (en) * | 1985-06-27 | 1987-01-14 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0631817Y2 (en) | 1994-08-22 |
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