JPS6268340U - - Google Patents
Info
- Publication number
- JPS6268340U JPS6268340U JP16017385U JP16017385U JPS6268340U JP S6268340 U JPS6268340 U JP S6268340U JP 16017385 U JP16017385 U JP 16017385U JP 16017385 U JP16017385 U JP 16017385U JP S6268340 U JPS6268340 U JP S6268340U
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- local oscillation
- wave
- frequency
- frequency conversion
- 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 5
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
Description
第１図は、本考案の周波数変換回路の一実施例
の回路図であり、第２図は、従来の周波数変換回
路の一例の回路図である。
１：段階同調回路、３：局部発振回路、１６：
ＭＯＳＦＥＴ、４，２０：インジエクシヨン容量
、２１：固定コンデンサ、２２：可変容量ダイオ
ード。
FIG. 1 is a circuit diagram of an embodiment of a frequency conversion circuit of the present invention, and FIG. 2 is a circuit diagram of an example of a conventional frequency conversion circuit. 1: Step tuned circuit, 3: Local oscillation circuit, 16:
MOSFET, 4, 20: Injection capacitance, 21: Fixed capacitor, 22: Variable capacitance diode.
Claims (1)
発振された局部発振波と、を混合回路に注入して
中間周波信号を得る周波数変換回路において、前
記局部発振回路から前記混合回路に前記局部発振
波を注入する経路に可変容量ダイオードを介装し
、この可変容量ダイオードの容量値を前記局部発
振波の周波数に対応して変化させることを特徴と
する周波数変換回路。 In a frequency conversion circuit that obtains an intermediate frequency signal by injecting a signal selected by a tuning circuit and a local oscillation wave oscillated by a local oscillation circuit into a mixing circuit, the local oscillation wave is transmitted from the local oscillation circuit to the mixing circuit. A frequency conversion circuit characterized in that a variable capacitance diode is interposed in a wave injecting path, and the capacitance value of the variable capacitance diode is changed in accordance with the frequency of the locally oscillated wave.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16017385U JPS6268340U (en) | 1985-10-18 | 1985-10-18 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16017385U JPS6268340U (en) | 1985-10-18 | 1985-10-18 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6268340U true JPS6268340U (en) | 1987-04-28 |
Family
ID=31085306
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16017385U Pending JPS6268340U (en) | 1985-10-18 | 1985-10-18 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6268340U (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53711B2 (en) * | 1973-01-16 | 1978-01-11 | ||
| JPS53130910A (en) * | 1977-04-20 | 1978-11-15 | Nec Home Electronics Ltd | Local injection circuit |
-
1985
- 1985-10-18 JP JP16017385U patent/JPS6268340U/ja active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53711B2 (en) * | 1973-01-16 | 1978-01-11 | ||
| JPS53130910A (en) * | 1977-04-20 | 1978-11-15 | Nec Home Electronics Ltd | Local injection circuit |