JPS6144935U

JPS6144935U - Tuner device

Info

Publication number: JPS6144935U
Application number: JP13090084U
Authority: JP
Inventors: 勝男伊藤; 和夫紺谷; 雅彦東
Original assignee: 株式会社村田製作所
Priority date: 1984-08-28
Filing date: 1984-08-28
Publication date: 1986-03-25

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) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

図面はこの考案の一実施例を示す回路図である。図において、１４はＶＨＦ入力同調回路、１６はＶＨＦ
高周波増幅回路、１８は■ｆミキサ回路、２０は■ｆ
局発回路、３０はスイッチング回路、Ｄ１およびＤ２は
ダイオード、ＳＷは手動スイッチ、ＵＩＮはＵＨＦ中間
周波数信号入力端、正はミキサ回路の出力端、ＶＢはＶ
ＨＦ用バイアス端、郡はＵＨＦ用バイアス端を示す。The drawing is a circuit diagram showing an embodiment of this invention. In the figure, 14 is a VHF input tuning circuit, and 16 is a VHF input tuning circuit.
High frequency amplifier circuit, 18 is ■f mixer circuit, 20 is ■f
Local oscillator circuit, 30 is a switching circuit, D1 and D2 are diodes, SW is a manual switch, UIN is a UHF intermediate frequency signal input terminal, positive is the output terminal of the mixer circuit, VB is V
The HF bias end and group indicate the UHF bias end.

Claims

[Claims for Utility Model Registration] 1. A tuner device including 13 switching contacts, all of which are connected to a VHF related circuit, comprising: a manual switch that can be operated externally; and a switching device that operates in response to the operation of the manual switch. circuit, and an input terminal for an LJHF intermediate frequency signal, and configured to switch the bias of the switching circuit in response to the operation of the manual switch to provide the UHF intermediate frequency signal from the input terminal to the VHF mixer circuit. A tuner device. 2 In response to the manual switch being operated, the VH
2. The tuner device according to claim 1, which is a utility model, and comprises a VHF high-frequency amplification circuit for F television signals and (2) disabling means for disabling the normal station oscillation circuit.