JPH0314842U - - Google Patents

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Publication number
JPH0314842U
JPH0314842U JP7463689U JP7463689U JPH0314842U JP H0314842 U JPH0314842 U JP H0314842U JP 7463689 U JP7463689 U JP 7463689U JP 7463689 U JP7463689 U JP 7463689U JP H0314842 U JPH0314842 U JP H0314842U
Authority
JP
Japan
Prior art keywords
frequency
local oscillator
conversion means
frequency conversion
mixer
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
Application number
JP7463689U
Other languages
Japanese (ja)
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed filed Critical
Priority to JP7463689U priority Critical patent/JPH0314842U/ja
Publication of JPH0314842U publication Critical patent/JPH0314842U/ja
Pending legal-status Critical Current

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  • Superheterodyne Receivers (AREA)

Description

【図面の簡単な説明】[Brief explanation of drawings]

第１図は本願考案の一実施例を示すブロツク図
、第２図は従来の回路を示すブロツク図である。 図中、３……受信周波数帯域選択手段、１１，
１１ａ，１１ｂ……混合器、１２……周波数局可
変部発振器。 FIG. 1 is a block diagram showing an embodiment of the present invention, and FIG. 2 is a block diagram showing a conventional circuit. In the figure, 3... reception frequency band selection means, 11,
11a, 11b...mixer, 12...frequency station variable section oscillator.

Claims (1)

【実用新案登録請求の範囲】 ［１］ 高周波入力信号と周波数可変局部発振器
出力とを第一の混合器で混合して中間周波数を得
る第一の周波数変換手段と、 高周波入力信号を第一の混合器の入力である上
記周波数可変局部発振器の出力と同一の信号源で
かつ同一の周波数の信号で周波数変換する前置混
合器を上記第一の周波数変換手段の前段に設けた
前置周波数変換手段と、 上記第一の周波数変換手段にアンテナからの入
力と、前置周波数変換手段の出力とのいずれか一
方を選択的に入力するための受信周波数帯域選択
手段と を備えた受信装置。 ［２］ 周波数変化がステツプ状に変化する周波
数可変局部発振器を使用し、前置混合器を使用時
に該周波数可変局部発振器の周波数変化を1/2の
ステツプとすることでいずれの周波数帯域でも実
質的に同一ステツプとする請求項１記載の受信装
置。[Claims for Utility Model Registration] [1] A first frequency conversion means for obtaining an intermediate frequency by mixing a high frequency input signal and an output of a variable frequency local oscillator in a first mixer; Pre-frequency conversion, in which a pre-mixer is provided upstream of the first frequency conversion means to perform frequency conversion using a signal that is the same signal source and has the same frequency as the output of the variable frequency local oscillator that is the input of the mixer. and receiving frequency band selection means for selectively inputting either the input from the antenna or the output of the pre-frequency conversion means to the first frequency conversion means. [2] By using a variable frequency local oscillator whose frequency changes in steps, and by setting the frequency change of the variable frequency local oscillator in 1/2 steps when using a premixer, it is possible to effectively control the frequency in any frequency band. 2. The receiving device according to claim 1, wherein the steps are identical.
JP7463689U 1989-06-26 1989-06-26 Pending JPH0314842U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7463689U JPH0314842U (en) 1989-06-26 1989-06-26

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7463689U JPH0314842U (en) 1989-06-26 1989-06-26

Publications (1)

Publication Number Publication Date
JPH0314842U true JPH0314842U (en) 1991-02-14

Family

ID=31614497

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7463689U Pending JPH0314842U (en) 1989-06-26 1989-06-26

Country Status (1)

Country Link
JP (1) JPH0314842U (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01133431A (en) * 1987-11-19 1989-05-25 Matsushita Electric Ind Co Ltd microwave receiver

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01133431A (en) * 1987-11-19 1989-05-25 Matsushita Electric Ind Co Ltd microwave receiver

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