JPS60116748U - UHF-VHF receiver - Google Patents
UHF-VHF receiverInfo
- Publication number
- JPS60116748U JPS60116748U JP427584U JP427584U JPS60116748U JP S60116748 U JPS60116748 U JP S60116748U JP 427584 U JP427584 U JP 427584U JP 427584 U JP427584 U JP 427584U JP S60116748 U JPS60116748 U JP S60116748U
- Authority
- JP
- Japan
- Prior art keywords
- gate
- uhf
- vhf
- signal
- input
- 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
Landscapes
- Superheterodyne Receivers (AREA)
- Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図は従来のＬＪＨＦ−ＶＨＦ受信装置の要部回路図
、第２図は本考案の実施例の要部回路図である。
１はＵＨＦ信号入力端子、２はＵＨＦ信号増幅、周波数
変換回路、３は端子、４はＶＨＦ信号入力端子、５はＶ
ＨＦ′信号増幅回路、６は端子、７は局部発振回路、８
は電界効果トランジスタ、９は出力端子、ｓｗｌ、ｓｗ
２．ｓｗは切換スイッチ、Ｒ１〜ＲＩＧは抵抗、Ｇｌ、
Ｇ２は第１ゲート及び第２ゲート、Ｓはソース、Ｄはド
レイン、０１〜Ｃ６はコンデンサ、ＩＦＴは中間周波ト
ランス、Ｂ１〜Ｂ６は電源、ＤＩ、Ｄ２は第１及び第２
のダイオードである。FIG. 1 is a circuit diagram of a main part of a conventional LJHF-VHF receiver, and FIG. 2 is a circuit diagram of a main part of an embodiment of the present invention. 1 is a UHF signal input terminal, 2 is a UHF signal amplification, frequency conversion circuit, 3 is a terminal, 4 is a VHF signal input terminal, 5 is V
HF' signal amplification circuit, 6 is a terminal, 7 is a local oscillation circuit, 8
is a field effect transistor, 9 is an output terminal, swl, sw
2. sw is a changeover switch, R1 to RIG are resistors, GI,
G2 is the first gate and second gate, S is the source, D is the drain, 01 to C6 are the capacitors, IFT is the intermediate frequency transformer, B1 to B6 are the power supply, DI and D2 are the first and second
diode.
Claims (1)
ートに入力して周波数変換回路として動作し、ＵＨＦ受
信時には周波数変換されたＵＨＦ受信信号の中間周波数
信号を第２ゲートに入力して中゛ 間層波信号の増幅回
路として動作する電界効果トランジスタと、該電界効果
トランジスタの第１ゲートと第２ゲートとにそれぞれ接
続された第１及び第２のダイオードと、前記第１ゲート
と第２ゲートとの間に接続された抵抗と、ＶＨＦ受信時
に前記第２のダイオードを介して前記第２のゲートに飽
和領域で動作する電圧を印加し、ＵＨＦ受信時に前記第
１のダイオードを介して前記第１ゲートに且つ前記第１
のダイオードと抵抗とを介して第２ゲートに所定のバイ
アス電圧を加える一切換スイッチとを備えたことを特徴
とするＵＨＦ−ＶＨＦ受信装置。When receiving VHF, the VHF signal and local oscillation signal are input to the first gate to operate as a frequency conversion circuit, and when receiving UHF, the intermediate frequency signal of the frequency-converted UHF reception signal is input to the second gate and the intermediate frequency signal is input to the first gate. a field effect transistor operating as an amplification circuit for a layer wave signal; first and second diodes connected to a first gate and a second gate of the field effect transistor, respectively; and the first gate and the second gate. A voltage that operates in the saturation region is applied to the second gate through the second diode during VHF reception, and a voltage that operates in the saturation region is applied to the second gate through the first diode during UHF reception. to the gate and the first
1. A UHF-VHF receiver comprising: a changeover switch that applies a predetermined bias voltage to a second gate via a diode and a resistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP427584U JPS60116748U (en) | 1984-01-18 | 1984-01-18 | UHF-VHF receiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP427584U JPS60116748U (en) | 1984-01-18 | 1984-01-18 | UHF-VHF receiver |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS60116748U true JPS60116748U (en) | 1985-08-07 |
Family
ID=30479691
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP427584U Pending JPS60116748U (en) | 1984-01-18 | 1984-01-18 | UHF-VHF receiver |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60116748U (en) |
-
1984
- 1984-01-18 JP JP427584U patent/JPS60116748U/en active Pending
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