JPH0224629U - - Google Patents
Info
- Publication number
- JPH0224629U JPH0224629U JP10209888U JP10209888U JPH0224629U JP H0224629 U JPH0224629 U JP H0224629U JP 10209888 U JP10209888 U JP 10209888U JP 10209888 U JP10209888 U JP 10209888U JP H0224629 U JPH0224629 U JP H0224629U
- Authority
- JP
- Japan
- Prior art keywords
- frequency
- deviation
- control data
- receiving
- correction
- 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.)
- Granted
Links
- 238000001514 detection method Methods 0.000 claims description 5
- 230000003247 decreasing effect Effects 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 8
Landscapes
- Channel Selection Circuits, Automatic Tuning Circuits (AREA)
Description
第１図はこの考案の一実施例に係るＦＭ受信機
のブロツク図、第２図は第１図中のデイスクリミ
ネータの周波数偏差検出特性を示す線図、第３図
の図１は第１図中のマイクロコンピユータのＲＯ
Ｍに格納された内容を示す説明図、第３図の図２
は第１図中のマイクロコンピユータのＲＡＭに格
納された内容を示す説明図、第４図と第５図は第
１図中のマイクロコンピユータの動作を示すフロ
ーチヤート、第６図は第５図の変形例を示すフロ
ーチヤート、第７図は従来のＡＦＣ機能付ＦＭ受
信機を示すブロツク図、第８図は従来の他のＡＦ
Ｃ装置を示すブロツク図である。
１６：ＰＬＬ回路、１９：フロントエンド、２
２：デイスクリミネータ、３８：マイクロコンピ
ユータ。
FIG. 1 is a block diagram of an FM receiver according to an embodiment of this invention, FIG. 2 is a diagram showing the frequency deviation detection characteristics of the discriminator in FIG. 1, and FIG. RO of the microcomputer in the diagram
Explanatory diagram showing the contents stored in M, Figure 2 in Figure 3
is an explanatory diagram showing the contents stored in the RAM of the microcomputer in FIG. 1, FIGS. 4 and 5 are flowcharts showing the operation of the microcomputer in FIG. A flowchart showing a modified example, FIG. 7 is a block diagram showing a conventional FM receiver with AFC function, and FIG. 8 is a block diagram showing another conventional FM receiver.
FIG. 3 is a block diagram showing the C device. 16: PLL circuit, 19: Front end, 2
2: Discriminator, 38: Microcomputer.
Claims (1)
する周波数で信号の受信を行うＰＬＬ周波数シン
セサイザ式の受信手段と、この受信手段の受信周
波数を基準にした受信信号周波数の偏差を検出す
る周波数偏差検出手段と、を備えた受信機におい
て、 周波数偏差検出手段で検出した周波数偏差が０
，＋，−のいずれかを判別する偏差方向判別手段
と、 周波数偏差が＋（−）のとき、０になるまで受
信手段に入力される周波数制御データを、所定周
波数単位分ずつ増大（減少）させる周波数修正手
段と、 を備えたことを特徴とする受信機。 (2) 外部から入力した周波数制御データに対応
する周波数で信号の受信を行うＰＬＬ周波数シン
セサイザ式の受信手段と、この受信手段の受信周
波数を基準にした受信信号周波数の偏差を検出す
る周波数偏差検出手段と、を備えた受信機におい
て、 初めに、周波数偏差検出手段で検出した周波数
偏差分だけ受信手段に入力される周波数制御デー
タを修正する第１の周波数修正手段と、 第１の周波数修正手段が修正を行つたあと、周
波数偏差検出手段で検出された周波数偏差が０，
＋，−のいずれかを判別する偏差方向判別手段と
、 この偏差方向判別手段による判別の結果、周波
数偏差がまだ＋（−）のとき、０になるまで第１
の周波数修正手段で修正後の周波数制御データを
、更に、所定周波数単位分ずつ増大（減少）させ
て受信手段に入力させる第２の周波数修正手段と
、 を備えたことを特徴とする受信機。[Claims for Utility Model Registration] (1) A PLL frequency synthesizer type receiving means for receiving signals at a frequency corresponding to frequency control data inputted from the outside, and a received signal frequency based on the receiving frequency of this receiving means. A receiver equipped with a frequency deviation detection means for detecting a deviation of
, +, or -, and when the frequency deviation is + (-), the frequency control data input to the receiving means is increased (decreased) by a predetermined frequency unit until the frequency deviation becomes 0. A receiver comprising: a frequency correction means for adjusting the frequency; (2) A PLL frequency synthesizer type receiving means that receives a signal at a frequency corresponding to frequency control data inputted from the outside, and a frequency deviation detection device that detects a deviation of the received signal frequency based on the reception frequency of this receiving means. First, a first frequency correction means corrects the frequency control data input to the reception means by the frequency deviation detected by the frequency deviation detection means; and a first frequency correction means. After the correction is made, the frequency deviation detected by the frequency deviation detection means is 0,
A deviation direction determining means for determining either + or -, and as a result of the determination by this deviation direction determining means, when the frequency deviation is still + (-), the first
A receiver comprising: second frequency correction means for increasing (decreasing) the frequency control data corrected by the frequency correction means by a predetermined frequency unit and inputting the data to the reception means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988102098U JPH0619218Y2 (en) | 1988-08-01 | 1988-08-01 | Receiving machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988102098U JPH0619218Y2 (en) | 1988-08-01 | 1988-08-01 | Receiving machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0224629U true JPH0224629U (en) | 1990-02-19 |
| JPH0619218Y2 JPH0619218Y2 (en) | 1994-05-18 |
Family
ID=31331690
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1988102098U Expired - Lifetime JPH0619218Y2 (en) | 1988-08-01 | 1988-08-01 | Receiving machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0619218Y2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04286220A (en) * | 1991-03-14 | 1992-10-12 | Nec Corp | Satellite communication earth station equipment |
| JPH05259821A (en) * | 1990-03-09 | 1993-10-08 | Thomson Consumer Electron Inc | Tuning system |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51128214A (en) * | 1975-04-30 | 1976-11-09 | Toshiba Corp | Receiver |
-
1988
- 1988-08-01 JP JP1988102098U patent/JPH0619218Y2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51128214A (en) * | 1975-04-30 | 1976-11-09 | Toshiba Corp | Receiver |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05259821A (en) * | 1990-03-09 | 1993-10-08 | Thomson Consumer Electron Inc | Tuning system |
| JPH04286220A (en) * | 1991-03-14 | 1992-10-12 | Nec Corp | Satellite communication earth station equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0619218Y2 (en) | 1994-05-18 |
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