JPH0247844U - - Google Patents
Info
- Publication number
- JPH0247844U JPH0247844U JP12660888U JP12660888U JPH0247844U JP H0247844 U JPH0247844 U JP H0247844U JP 12660888 U JP12660888 U JP 12660888U JP 12660888 U JP12660888 U JP 12660888U JP H0247844 U JPH0247844 U JP H0247844U
- Authority
- JP
- Japan
- Prior art keywords
- mixing circuit
- frequency signal
- circuit
- intermediate frequency
- 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 6
- 238000006243 chemical reaction Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 5
Landscapes
- Superheterodyne Receivers (AREA)
Description
第１図は本考案の一実施例を示す図、第２図は
第１ローパスフイルタの特性図、第３図は第２ロ
ーパスフイルタの特性図、第４図は従来例を示す
図、第５図は本考案における特性と従来例におけ
る特性を示す図である。
１……入力端子、５……第１混合回路、６……
第１局部発振回路、７，８……ＢＰＦ、１１……
第２混合回路、１２……第２局部発振回路、１５
……第１ローパスフイルタ、１６……第２ローパ
スフイルタ。
FIG. 1 is a diagram showing an embodiment of the present invention, FIG. 2 is a characteristic diagram of the first low-pass filter, FIG. 3 is a characteristic diagram of the second low-pass filter, FIG. 4 is a diagram showing a conventional example, and FIG. The figure is a diagram showing characteristics in the present invention and characteristics in a conventional example. 1...Input terminal, 5...First mixing circuit, 6...
First local oscillation circuit, 7, 8... BPF, 11...
Second mixing circuit, 12...Second local oscillation circuit, 15
...First low-pass filter, 16...Second low-pass filter.
Claims (1)
り第１中間周波数信号に変換する第１混合回路と
、第１中間周波数信号を第２局部発振信号により
第２中間周波数信号に変換する第２混合回路と、
第１混合回路と第２混合回路間に設けられ、第１
中間周波数信号を通過させる誘電体共振器よりな
るバンドパスフイルタとを備えたダブルコンバー
ジヨンチユーナにおいて、第１混合回路と第２混
合回路及び第２混合回路と第２局部発振回路間に
ローパスフイルタを設けたことを特徴とするダブ
ルコンバージヨンチユーナ。 A first mixing circuit that converts a high frequency signal into a first intermediate frequency signal using an oscillation signal from a first local oscillation circuit; and a second mixing circuit that converts the first intermediate frequency signal into a second intermediate frequency signal using a second local oscillation signal. and,
The first mixing circuit is provided between the first mixing circuit and the second mixing circuit.
In a double conversion tuner equipped with a bandpass filter made of a dielectric resonator that passes an intermediate frequency signal, a lowpass filter is provided between the first mixing circuit and the second mixing circuit, and between the second mixing circuit and the second local oscillation circuit. A double convergence unit characterized by the provision of.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12660888U JPH0247844U (en) | 1988-09-27 | 1988-09-27 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12660888U JPH0247844U (en) | 1988-09-27 | 1988-09-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0247844U true JPH0247844U (en) | 1990-04-03 |
Family
ID=31378282
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12660888U Pending JPH0247844U (en) | 1988-09-27 | 1988-09-27 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0247844U (en) |
-
1988
- 1988-09-27 JP JP12660888U patent/JPH0247844U/ja active Pending