JPS5917624U - AGC circuit - Google Patents
AGC circuitInfo
- Publication number
- JPS5917624U JPS5917624U JP10945782U JP10945782U JPS5917624U JP S5917624 U JPS5917624 U JP S5917624U JP 10945782 U JP10945782 U JP 10945782U JP 10945782 U JP10945782 U JP 10945782U JP S5917624 U JPS5917624 U JP S5917624U
- Authority
- JP
- Japan
- Prior art keywords
- channel
- operating range
- agc circuit
- agc
- circuit
- 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
Landscapes
- Control Of Amplification And Gain Control (AREA)
- Circuits Of Receivers In General (AREA)
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
第１図は従来のＡＧＣ回路のブロック図、第２図は第１
図の動作を説明するグラフ、第３図は本考案のＡＧＣ回
路の一実施例のブロック図、第４図は第３図のＡＧＣ特
性を説明するグラフ、第５図及び第６図は第３図の他の
実施例のブロック図、第７図は第６図のＡＧＣ特性を説
明するグラフである。
図中符号１８はチューナＡＧＣ回路、１９゜２３は選局
信号・電圧変換回路、２４は中間周波レベル検出回路、
２５はＡＧＣ補正回路、６゜２１は選局装置、１１はＰ
ＩＦアンプ、１２は映像検波器、１４はＡＧＣ検波器で
ある。Figure 1 is a block diagram of a conventional AGC circuit, and Figure 2 is a block diagram of a conventional AGC circuit.
3 is a block diagram of an embodiment of the AGC circuit of the present invention, FIG. 4 is a graph explaining the AGC characteristics of FIG. 3, and FIGS. FIG. 7 is a block diagram of another embodiment shown in the figure, and is a graph explaining the AGC characteristics of FIG. 6. In the figure, reference numeral 18 is a tuner AGC circuit, 19°23 is a tuning signal/voltage conversion circuit, 24 is an intermediate frequency level detection circuit,
25 is the AGC correction circuit, 6゜21 is the channel selection device, 11 is P
IF amplifier, 12 is a video detector, and 14 is an AGC detector.
Claims (3)
ネルに同調した中間周波を形成し、所定の動作点を有す
るＡＧＣ信号に応じた利得で中間周波を出力するチュー
ナにおいて、前記チャネルを選局する選局手段と、前記
動作域を前記チャネルに対応して定めるべく前記動作域
を可変としたＡＧＣ回路とを具備し、チャネルに対応し
た動作域でチューナの利得を自動制御するよう構成した
ことを特徴とするＡＧＣ回路。(1) In a tuner that forms an intermediate frequency tuned to a selected channel from radio waves input from an antenna and outputs the intermediate frequency with a gain according to an AGC signal having a predetermined operating point, selects the channel. and an AGC circuit whose operating range is variable to determine the operating range corresponding to the channel, and configured to automatically control the gain of the tuner in the operating range corresponding to the channel. An AGC circuit featuring:
局手段に設けた選局信号、電圧変換手段で得た電圧そ変
化するよう構成した前記実用新案登録請求の範囲第１項
記載のＡＧＣ回路。(2) The AGC circuit according to claim 1 of the utility model registration, wherein the AGC circuit has a variable operating range and is configured to change the channel selection signal provided in the channel selection means and the voltage obtained by the voltage conversion means. circuit.
間周波のレベルに応じて補正すべ（ＡＧＣ信号補正手段
を具備した前記実用新案登録請求の範囲第１項記載のＡ
ＧＣ回路。(3) The AGC circuit with a variable operating range should be corrected according to the level of the intermediate frequency (A in accordance with claim 1 of the utility model registration claim, which is equipped with an AGC signal correction means).
GC circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10945782U JPS5917624U (en) | 1982-07-21 | 1982-07-21 | AGC circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10945782U JPS5917624U (en) | 1982-07-21 | 1982-07-21 | AGC circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5917624U true JPS5917624U (en) | 1984-02-02 |
Family
ID=30254966
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10945782U Pending JPS5917624U (en) | 1982-07-21 | 1982-07-21 | AGC circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5917624U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5238805A (en) * | 1975-09-23 | 1977-03-25 | Casio Comput Co Ltd | Receiver |
-
1982
- 1982-07-21 JP JP10945782U patent/JPS5917624U/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5238805A (en) * | 1975-09-23 | 1977-03-25 | Casio Comput Co Ltd | Receiver |
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