JPH0392825U - - Google Patents

Info

Publication number
JPH0392825U
JPH0392825U JP116290U JP116290U JPH0392825U JP H0392825 U JPH0392825 U JP H0392825U JP 116290 U JP116290 U JP 116290U JP 116290 U JP116290 U JP 116290U JP H0392825 U JPH0392825 U JP H0392825U
Authority
JP
Japan
Prior art keywords
tuner
signal
detection signal
input
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
Application number
JP116290U
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 JP116290U priority Critical patent/JPH0392825U/ja
Publication of JPH0392825U publication Critical patent/JPH0392825U/ja
Pending legal-status Critical Current

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Landscapes

  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)
  • Superheterodyne Receivers (AREA)

Description

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

第1図は本考案の実施例に係る周波数シンセサ
イザ型ラジオ受信機の要部回路図、第2図は従来
例に係る周波数シンセサイザ型ラジオ受信機の要
部回路図である。 2……チユーナ、3……チユーナコントローラ
、6……中間周波増幅・検出回路(同調状態検出
回路)、7……局部発振回路、12……ローパス
フイルタ、15……マイクロコンピユータ。
FIG. 1 is a circuit diagram of a main part of a frequency synthesizer type radio receiver according to an embodiment of the present invention, and FIG. 2 is a main part circuit diagram of a frequency synthesizer type radio receiver according to a conventional example. 2... tuner, 3... tuner controller, 6... intermediate frequency amplification/detection circuit (tuning state detection circuit), 7... local oscillation circuit, 12... low pass filter, 15... microcomputer.

Claims (1)

【実用新案登録請求の範囲】 チユーナ2、およびチユーナコントローラ3を
有し、 チユーナ2は、局部発振回路7、および同調状
態検出回路6を有し、 局部発振回路7は、PLL回路で構成されてお
り、 PLL回路は、オートスキヤン信号の入力に応
答して局部発振周波数をスキヤン制御し、オート
スキヤン停止信号の入力時には、その入力時点で
の局部発振周波数にロツク制御するものであり、
かつ、その制御を、現時点での局部発振周波数の
基準周波数からの位相ずれに対応したローパスフ
イルタ12のフイルタ出力に基づいて行うもので
あり、 同調状態検出回路6は、チユーナ2が、非同調
状態にあるときは非同調検出信号を、同調状態に
あるときは同調検出信号を、それぞれ、出力する
ものであり、 チユーナコントローラ3は、オートスキヤン信
号をPLL回路に出力するものであり、かつ、非
同調検出信号が入力されているときはオートスキ
ヤン信号を出力し、同調検出信号が入力されたと
きはオートスキヤン停止信号を出力するものであ
り、 ローパスフイルタ12は、非同調検出信号が与
えられたときはカツトオフ周波数が高く、同調検
出信号が与えられたときはカツトオフ周波数が低
くなるものである ことを特徴とする周波数シンセサイザ型受信機。
[Claims for Utility Model Registration] It has a tuner 2 and a tuner controller 3, the tuner 2 has a local oscillation circuit 7 and a tuning state detection circuit 6, and the local oscillation circuit 7 is configured with a PLL circuit. The PLL circuit scan-controls the local oscillation frequency in response to the input of the auto-scan signal, and when the auto-scan stop signal is input, it performs lock control to the local oscillation frequency at the time of input.
The control is performed based on the filter output of the low-pass filter 12 corresponding to the phase shift of the current local oscillation frequency from the reference frequency. The tuner controller 3 outputs an out-of-synchronization detection signal when the tuner is in the tuned state and a tuning detection signal when the tuner is in the tuned state, and the tuner controller 3 outputs an autoscan signal to the PLL circuit, and The low-pass filter 12 outputs an auto scan signal when the out-of-tuning detection signal is input, and outputs an auto-scan stop signal when the out-of-tuning detection signal is input. A frequency synthesizer type receiver characterized in that the cutoff frequency is high when a tuning detection signal is applied, and the cutoff frequency is low when a tuning detection signal is applied.
JP116290U 1990-01-09 1990-01-09 Pending JPH0392825U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP116290U JPH0392825U (en) 1990-01-09 1990-01-09

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP116290U JPH0392825U (en) 1990-01-09 1990-01-09

Publications (1)

Publication Number Publication Date
JPH0392825U true JPH0392825U (en) 1991-09-20

Family

ID=31505079

Family Applications (1)

Application Number Title Priority Date Filing Date
JP116290U Pending JPH0392825U (en) 1990-01-09 1990-01-09

Country Status (1)

Country Link
JP (1) JPH0392825U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007007349A (en) * 2005-06-28 2007-01-18 Riyuubin Matsumoto Neck pin

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007007349A (en) * 2005-06-28 2007-01-18 Riyuubin Matsumoto Neck pin

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