JPS63125422U - - Google Patents
Info
- Publication number
- JPS63125422U JPS63125422U JP1987017359U JP1735987U JPS63125422U JP S63125422 U JPS63125422 U JP S63125422U JP 1987017359 U JP1987017359 U JP 1987017359U JP 1735987 U JP1735987 U JP 1735987U JP S63125422 U JPS63125422 U JP S63125422U
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- variable capacitance
- capacitance diode
- connection point
- local oscillation
- 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 description 3
- 230000008878 coupling Effects 0.000 claims description 2
- 238000010168 coupling process Methods 0.000 claims description 2
- 238000005859 coupling reaction Methods 0.000 claims description 2
- 239000003990 capacitor Substances 0.000 claims 1
- 238000001514 detection method Methods 0.000 claims 1
- 239000000284 extract Substances 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 6
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
- H04N5/60—Receiver circuitry for the reception of television signals according to analogue transmission standards for the sound signals
- H04N5/62—Intercarrier circuits, i.e. heterodyning sound and vision carriers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
- H04N5/50—Tuning indicators; Automatic tuning control
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Channel Selection Circuits, Automatic Tuning Circuits (AREA)
- Superheterodyne Receivers (AREA)
Description
第１図は本考案の一実施例を示す回路構成図、
第２図は第１図ａ′点の電圧特性図、第３図は第
１図ｂ点の電圧特性図、第４図は従来例を示す回
路構成図、第５図は第４図ａ点の電圧特性図、第
６図は第４図ｂ点の電圧特性図である。 １…局部発振回路、２…混合回路、Ｄ１…可変
容量ダイオード（第２の可変容量ダイオード）、
Ｄ２…可変容量ダイオード（第３の可変容量ダイ
オード）、Ｄ４…同調用可変容量ダイオード（第
１の可変容量ダイオード）、Ｒ６…抵抗、Ｃ１０
…結合容量。
第２図は第１図ａ′点の電圧特性図、第３図は第
１図ｂ点の電圧特性図、第４図は従来例を示す回
路構成図、第５図は第４図ａ点の電圧特性図、第
６図は第４図ｂ点の電圧特性図である。 １…局部発振回路、２…混合回路、Ｄ１…可変
容量ダイオード（第２の可変容量ダイオード）、
Ｄ２…可変容量ダイオード（第３の可変容量ダイ
オード）、Ｄ４…同調用可変容量ダイオード（第
１の可変容量ダイオード）、Ｒ６…抵抗、Ｃ１０
…結合容量。
Claims (1)
- 同調周波数に対応した制御電圧を印加すること
により、局部発振周波数を変化する第１の可変容
量ダイオードを有し、該第１の可変容量ダイオー
ドのカソードと、中間周波数ずれ検出回路へのＡ
ＦＴ電圧出力端子との間に第２、第３の２個の可
変容量ダイオードの直列回路を接続し、且つ両ダ
イオードのアノード接続点を抵抗を介して接地し
た局部発振回路を備え、前記両ダイオードのアノ
ード接続点から結合容量を介して混合回路への出
力電圧を取り出してなることを特徴とするスーパ
ーヘテロダイン受信回路。
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987017359U JPS63125422U (ja) | 1987-02-09 | 1987-02-09 | |
| KR2019880001494U KR930004660Y1 (ko) | 1987-02-09 | 1988-02-09 | 슈퍼 헤테로다인 수신회로 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987017359U JPS63125422U (ja) | 1987-02-09 | 1987-02-09 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63125422U true JPS63125422U (ja) | 1988-08-16 |
Family
ID=30810046
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987017359U Pending JPS63125422U (ja) | 1987-02-09 | 1987-02-09 |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JPS63125422U (ja) |
| KR (1) | KR930004660Y1 (ja) |
-
1987
- 1987-02-09 JP JP1987017359U patent/JPS63125422U/ja active Pending
-
1988
- 1988-02-09 KR KR2019880001494U patent/KR930004660Y1/ko not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| KR880017003U (ko) | 1988-10-08 |
| KR930004660Y1 (ko) | 1993-07-22 |