JPS6454442U - - Google Patents
Info
- Publication number
- JPS6454442U JPS6454442U JP1987149487U JP14948787U JPS6454442U JP S6454442 U JPS6454442 U JP S6454442U JP 1987149487 U JP1987149487 U JP 1987149487U JP 14948787 U JP14948787 U JP 14948787U JP S6454442 U JPS6454442 U JP S6454442U
- Authority
- JP
- Japan
- Prior art keywords
- electric field
- field strength
- received electric
- control section
- section
- 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
- 238000000926 separation method Methods 0.000 claims description 8
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 230000005684 electric field Effects 0.000 claims 11
- 238000001514 detection method Methods 0.000 claims 5
- 238000010586 diagram Methods 0.000 description 2
Description
第１図はこの考案の一実施例に係るＦＭステレ
オ受信機のブロツク図、第２図は従来のＦＭステ
レオ受信機のブロツク図である。
３７……Ｓメータ出力回路、４２……ステレオ
復調回路、４８Ａ……動作点調整回路、４４……
ｆ特コントロール回路、４６……分離度特性コン
トロール回路、５０……インピーダンス変換回路
、５２……第１調整回路、５４……第２調整回路
。
FIG. 1 is a block diagram of an FM stereo receiver according to an embodiment of this invention, and FIG. 2 is a block diagram of a conventional FM stereo receiver. 37... S meter output circuit, 42... Stereo demodulation circuit, 48A... Operating point adjustment circuit, 44...
f characteristic control circuit, 46... separation characteristic control circuit, 50... impedance conversion circuit, 52... first adjustment circuit, 54... second adjustment circuit.
Claims (1)
、この受信電界強度検出部が検出した受信電界強
度に応じて、ステレオ復調部の出力信号の周波数
特性を自動コントロールする周波数特性コントロ
ール部と、受信電界強度検出部が検出した受信電
界強度に応じて、ステレオ復調部の出力信号の分
離度を自動コントロールする分離度コントロール
部と、受信電界強度検出部と周波数特性コントロ
ール部及び分離度コントロール部の間に設けられ
て、受信電界強度に対する周波数特性コントロー
ル部及び分離度コントロール部の動作点を調整す
る動作点調整部と、を備えたＦＭステレオ受信機
において、 前記動作点調整部は、受信電界強度検出部の出
力側に設けられた低出力インピーダンス変換回路
と、 この低出力インピーダンス変換回路の出力側と
周波数特性コントロール部の間に設けられて、受
信電界強度に対する周波数特性コントロール部の
動作点を調整する第１調整回路と、 低出力インピーダンス変換回路の出力側と分離
度コントロール部の間に設けられて、受信電界強
度に対する分離度コントロール部の動作点を調整
する第２調整回路と、 を含むことを特徴とするＦＭステレオ受信機のノ
イズ低減装置。[Claims for Utility Model Registration] A received electric field strength detection section that detects the received electric field strength, and automatic control of the frequency characteristics of the output signal of the stereo demodulation section according to the received electric field strength detected by the received electric field strength detection section. A frequency characteristic control section, a separation degree control section that automatically controls the degree of separation of output signals of the stereo demodulation section according to the received electric field strength detected by the received electric field strength detection section, a received electric field strength detection section, and a frequency characteristic control section. and an operating point adjustment section that is provided between the separation degree control section and adjusts the operating point of the frequency characteristic control section and the separation degree control section for the received electric field strength, The section includes a low output impedance conversion circuit provided on the output side of the received electric field strength detection section, and a frequency characteristic control section for the received electric field strength provided between the output side of the low output impedance conversion circuit and the frequency characteristic control section. a first adjustment circuit that adjusts the operating point of the separation control section; and a second adjustment circuit that is provided between the output side of the low output impedance conversion circuit and the separation control section and adjusts the operating point of the separation control section with respect to received electric field strength. A noise reduction device for an FM stereo receiver, comprising: a circuit;
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987149487U JPH0424671Y2 (en) | 1987-09-30 | 1987-09-30 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987149487U JPH0424671Y2 (en) | 1987-09-30 | 1987-09-30 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6454442U true JPS6454442U (en) | 1989-04-04 |
| JPH0424671Y2 JPH0424671Y2 (en) | 1992-06-11 |
Family
ID=31421759
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987149487U Expired JPH0424671Y2 (en) | 1987-09-30 | 1987-09-30 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0424671Y2 (en) |
-
1987
- 1987-09-30 JP JP1987149487U patent/JPH0424671Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0424671Y2 (en) | 1992-06-11 |
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