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
Links
- 238000001514 detection method Methods 0.000 claims description 9
- 230000010355 oscillation Effects 0.000 claims description 6
- 230000010363 phase shift Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
Landscapes
- Channel Selection Circuits, Automatic Tuning Circuits (AREA)
- Superheterodyne Receivers (AREA)
Description
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)
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.
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)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007007349A (en) * | 2005-06-28 | 2007-01-18 | Riyuubin Matsumoto | Neck pin |
-
1990
- 1990-01-09 JP JP116290U patent/JPH0392825U/ja active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007007349A (en) * | 2005-06-28 | 2007-01-18 | Riyuubin Matsumoto | Neck pin |
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