JPH0164234U - - Google Patents
Info
- Publication number
- JPH0164234U JPH0164234U JP1987159519U JP15951987U JPH0164234U JP H0164234 U JPH0164234 U JP H0164234U JP 1987159519 U JP1987159519 U JP 1987159519U JP 15951987 U JP15951987 U JP 15951987U JP H0164234 U JPH0164234 U JP H0164234U
- Authority
- JP
- Japan
- Prior art keywords
- intermediate frequency
- signal
- mixer
- frequency signal
- amplifier
- 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
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 230000010355 oscillation Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 4
Landscapes
- Superheterodyne Receivers (AREA)
Description
第１図は本考案のダブルコンバージヨンチユー
ナのブロツク図、第２図はその要部を示す回路図
、第３図はローパスフイルタの特性図、第４図は
第２図の回路の周波数特性を示す図、第５図は従
来のダブルコンバージヨンチユーナのブロツク図
である。
３……第１ミキサ、４……第１局部発振器、６
……第２ミキサ、７……第２局部発振器、１０…
…増幅器、１１……バンドパスフイルタ、１３…
…ローパスフイルタ。
Figure 1 is a block diagram of the double conversion tuner of the present invention, Figure 2 is a circuit diagram showing its main parts, Figure 3 is a characteristic diagram of the low-pass filter, and Figure 4 is the frequency characteristic of the circuit shown in Figure 2. FIG. 5 is a block diagram of a conventional double conversion tuner. 3...first mixer, 4...first local oscillator, 6
...Second mixer, 7...Second local oscillator, 10...
...Amplifier, 11... Bandpass filter, 13...
...Low pass filter.
Claims (1)
入力信号の周波数よりも高い周波数の第１の中間
周波信号に変換する第１ミキサと、第２局部発振
器の発振信号により第１の中間周波信号を該第１
の中間周波信号よりも低い周波数の第２の中間周
波信号に変換する第２ミキサと、前記第１ミキサ
で得られる第１の中間周波信号を前記第２ミキサ
に供給する中間周波回路とを備えるダブルコンバ
ージヨンチユーナにおいて、前記中間周波回路を
バンドパスフイルタと、このバンドパスフイルタ
の出力を増幅する増幅器と、この増幅器の信号が
供給されるローパスフイルタとから構成したダブ
ルコンバージヨンチユーナ。 a first mixer that converts an input signal into a first intermediate frequency signal having a frequency higher than the frequency of the input signal using an oscillation signal from a first local oscillator; The first
a second mixer that converts the intermediate frequency signal into a second intermediate frequency signal having a lower frequency than the intermediate frequency signal of the intermediate frequency signal, and an intermediate frequency circuit that supplies the first intermediate frequency signal obtained by the first mixer to the second mixer. A double conversion tuner in which the intermediate frequency circuit includes a bandpass filter, an amplifier for amplifying the output of the bandpass filter, and a lowpass filter to which a signal from the amplifier is supplied.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987159519U JPH0164234U (en) | 1987-10-19 | 1987-10-19 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987159519U JPH0164234U (en) | 1987-10-19 | 1987-10-19 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0164234U true JPH0164234U (en) | 1989-04-25 |
Family
ID=31440804
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987159519U Pending JPH0164234U (en) | 1987-10-19 | 1987-10-19 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0164234U (en) |
-
1987
- 1987-10-19 JP JP1987159519U patent/JPH0164234U/ja active Pending