JPS6345054Y2 - - Google Patents
Info
- Publication number
- JPS6345054Y2 JPS6345054Y2 JP1982099842U JP9984282U JPS6345054Y2 JP S6345054 Y2 JPS6345054 Y2 JP S6345054Y2 JP 1982099842 U JP1982099842 U JP 1982099842U JP 9984282 U JP9984282 U JP 9984282U JP S6345054 Y2 JPS6345054 Y2 JP S6345054Y2
- Authority
- JP
- Japan
- Prior art keywords
- variable resistor
- volume
- circuit
- sound quality
- resistor
- 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.)
- Expired
Links
- 239000003990 capacitor Substances 0.000 claims description 6
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 1
Landscapes
- Tone Control, Compression And Expansion, Limiting Amplitude (AREA)
Description
【考案の詳細な説明】
〔産業上の利用分野〕
本考案は、受信機およびトランシーバ等の無線
受信機のトーンコントロール回路に関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a tone control circuit for radio receivers such as receivers and transceivers.
従来のこの種回路は、第１図に示すように、到
来した受信信号は復調回路１を経てコンデンサＣ
を通り音質調整用の可変抵抗器２に供給されると
共に音量調整用の可変抵抗器３へ加えられ、該可
変抵抗器３の出力端子から低周波回路４を介して
スピーカ５に送出される。音質調整用の可変抵抗
２を変化すると、復調回路１の出力は一部コンデ
ンサを通して、前記可変抵抗２の接地抵抗の減少
と比例して高音域がバイパスされる。
In a conventional circuit of this type, as shown in FIG.
The signal is supplied to the variable resistor 2 for adjusting the sound quality, and is also applied to the variable resistor 3 for adjusting the volume, and is sent from the output terminal of the variable resistor 3 to the speaker 5 via the low frequency circuit 4. When the variable resistor 2 for adjusting sound quality is changed, part of the output of the demodulation circuit 1 is passed through a capacitor, and the high frequency range is bypassed in proportion to the decrease in the ground resistance of the variable resistor 2.
トーンコントロールを調整して高音域を減衰ま
たはカツトさせた場合、音量が実際の出力音量よ
りも小さくなつたように感じる。このため音量調
整用の可変抵抗器３を更に調節していた。無線受
信機の場合混信等により、高いビート音が出力さ
れることが多いので高音カツトを頻繁に行う。こ
のためその都度音質調整と、音量の両調整をする
不便さを解消するために高音域の低減に応じて音
量の不足分を償うトーンコントロール回路の提供
を目的とする。
When adjusting the tone control to attenuate or cut the high frequency range, the volume appears to be lower than the actual output volume. For this reason, the variable resistor 3 for volume adjustment was further adjusted. In the case of wireless receivers, high beat sounds are often output due to interference, so treble cuts are often performed. Therefore, in order to eliminate the inconvenience of having to adjust both the sound quality and the volume each time, it is an object of the present invention to provide a tone control circuit that compensates for the lack of volume in accordance with the reduction of the treble range.
復調回路の出力側と、音質調整用可変抵抗器の
一端との間にコンデンサを接続し、他端は抵抗を
介して低周波回路に接続し、該可変抵抗器の可動
接点を接地した音質調整回路と、前記復調回路の
出力側と、接地間に音量調整用可変抵抗の両端を
接続し、かつ可動接点は抵抗を介して低周波回路
に接続し、音質調整による高音域の減衰に反比例
して音量を増加させることを特徴とする無線受信
機のトーンコントロール回路である。
Sound quality adjustment in which a capacitor is connected between the output side of the demodulation circuit and one end of a variable resistor for sound quality adjustment, the other end is connected to a low frequency circuit via a resistor, and the movable contact of the variable resistor is grounded. Both ends of a variable resistor for volume adjustment are connected between the circuit, the output side of the demodulation circuit, and ground, and the movable contact is connected to a low frequency circuit via the resistor, and the movable contact is inversely proportional to the attenuation of the high frequency range due to the sound quality adjustment. This is a tone control circuit for a wireless receiver, which is characterized in that it increases the volume by changing the tone.
第２図は本考案の一実施例を示す無線受信機の
トーンコントロール回路であり、以下第２図につ
いて本考案の実施例を説明する。
FIG. 2 shows a tone control circuit of a radio receiver showing an embodiment of the present invention, and the embodiment of the present invention will be described below with reference to FIG.
復調回路１の出力側はコンデンサＣと音量調整
用の可変抵抗器３の一端に結線し、該コンデンサ
Ｃの他端を音質調整用の可変抵抗器２の一端に結
線し、かつ可変抵抗器２の可動接点は接地すると
共に他端は抵抗R2を介して低周波回路４に接続
し、前記音量調整用可変抵抗器３の他端は接地す
ると共に可動接点は抵抗R1を介して低周波回路
４とスピーカ５に縦属、接続する。 The output side of the demodulation circuit 1 is connected to a capacitor C and one end of a variable resistor 3 for volume adjustment, and the other end of the capacitor C is connected to one end of a variable resistor 2 for sound quality adjustment. The movable contact is grounded, and the other end is connected to the low frequency circuit 4 via the resistor R2 , the other end of the volume adjusting variable resistor 3 is grounded, and the movable contact is connected to the low frequency circuit 4 via the resistor R1. It is vertically connected to the circuit 4 and the speaker 5.
以上のような構成において、今、音質調整用の
可変抵抗器２と固定抵抗R1およびR2の抵抗値を
夫々10KΩに設定すると、
音量最大時においては、固定抵抗R1およびR2
による減衰量Ａは、
Ａ＝R2／R1＋R2＝10KΩ／20KΩ＝１／２＝−6dB
高音最低時では、固定抵抗R1とR2および音質
調整用の可変抵抗器２による減衰量Ｂは、
Ｂ＝R2＋VR／R1＋R2＋VR＝20KΩ／30KΩ
＝２／３＝−3.5dB
となる。 In the above configuration, if the resistance values of the variable resistor 2 for adjusting sound quality and the fixed resistors R 1 and R 2 are set to 10KΩ each, then at the maximum volume, the fixed resistors R 1 and R 2
Attenuation amount A due to A = R 2 / R 1 + R 2 = 10KΩ / 20KΩ = 1/2 = -6dB At the lowest treble, the attenuation amount due to fixed resistors R 1 and R 2 and variable resistor 2 for sound quality adjustment. B is as follows: B=R 2 +VR/R 1 +R 2 +VR=20KΩ/30KΩ=2/3=−3.5dB.
従つて、高音最高時と最低時においては、
2.5dBの音量調節を行なうことが出来る。ここで
固定抵抗R1およびR2の値を変えることによつて、
所望の音量を調節することが出来る。このように
音質調整用可変抵抗器の両端が一方は高音域の減
衰用端子であり、他端が音量調整でしかもシーソ
動作をするので高音域カツトによる音感低下を補
正し、音量用可変抵抗器を調整し直す必要はな
い。 Therefore, at the highest and lowest treble,
You can adjust the volume by 2.5dB. By changing the values of fixed resistors R 1 and R 2 here,
You can adjust the desired volume. In this way, one end of the variable resistor for sound quality adjustment is a terminal for attenuating the high frequency range, and the other end is for adjusting the volume. There is no need to readjust.
以上に詳述したように、本考案のトーンコント
ロール回路においては、音質調整用可変抵抗器の
可動接点接地と他端を抵抗を介して音量調整出力
と共に出力することにより、高音域低減による音
量を自動的に保償し得るので、混信の多い無線周
波帯では特に効果がある。
As detailed above, in the tone control circuit of the present invention, the sound quality adjustment variable resistor's movable contact is grounded and the other end is output together with the volume adjustment output via the resistor, thereby reducing the volume by reducing the high frequency range. Since it can be guaranteed automatically, it is particularly effective in radio frequency bands where there is a lot of interference.
第１図は従来の無線受信機のトーンコントロー
ル回路のブロツク図で、第２図は本考案の一実施
例を示す無線受信機のトーンコントロール回路の
要部が回路図を含むブロツク図である。
１……復調回路、２……音質調整用の可変抵抗
器、３……音量調整用の可変抵抗器、４……低周
波回路、５……スピーカ、Ｃ……コンデンサ、
R1，R2……固定抵抗。
FIG. 1 is a block diagram of a tone control circuit of a conventional radio receiver, and FIG. 2 is a block diagram including a circuit diagram of a main part of the tone control circuit of a radio receiver showing an embodiment of the present invention. 1... Demodulation circuit, 2... Variable resistor for sound quality adjustment, 3... Variable resistor for volume adjustment, 4... Low frequency circuit, 5... Speaker, C... Capacitor,
R 1 , R 2 ...Fixed resistance.
Claims (1)
一端との間にコンデンサを接続し、他端は抵抗を
介して低周波回路に接続し、該可変抵抗器の可動
接点を接地した音質調整回路と、前記復調回路の
出力側と、接地間に音量調整用可変抵抗の両端を
接続し、かつ可動接点は抵抗を介して低周波回路
に接続し、音質調整による高音域の低減に反比例
して音量を増加させることを特徴とする無線受信
機のトーンコントロール回路。 Sound quality adjustment in which a capacitor is connected between the output side of the demodulation circuit and one end of a variable resistor for sound quality adjustment, the other end is connected to a low frequency circuit via a resistor, and the movable contact of the variable resistor is grounded. Both ends of a variable resistor for volume adjustment are connected between the circuit, the output side of the demodulation circuit, and ground, and the movable contact is connected to a low frequency circuit via the resistor, so that the sound quality adjustment is inversely proportional to the reduction in high frequency range. A tone control circuit for a wireless receiver, characterized in that the tone control circuit increases the volume by increasing the volume.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9984282U JPS596318U (en) | 1982-07-01 | 1982-07-01 | Radio receiver tone control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9984282U JPS596318U (en) | 1982-07-01 | 1982-07-01 | Radio receiver tone control circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS596318U JPS596318U (en) | 1984-01-17 |
| JPS6345054Y2 true JPS6345054Y2 (en) | 1988-11-22 |
Family
ID=30236436
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9984282U Granted JPS596318U (en) | 1982-07-01 | 1982-07-01 | Radio receiver tone control circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS596318U (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4122258Y1 (en) * | 1964-07-08 | 1966-11-07 | ||
| JPS5422438B2 (en) * | 1977-05-14 | 1979-08-07 |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5328676Y2 (en) * | 1973-08-08 | 1978-07-19 | ||
| JPS5422438U (en) * | 1977-07-16 | 1979-02-14 |
-
1982
- 1982-07-01 JP JP9984282U patent/JPS596318U/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4122258Y1 (en) * | 1964-07-08 | 1966-11-07 | ||
| JPS5422438B2 (en) * | 1977-05-14 | 1979-08-07 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS596318U (en) | 1984-01-17 |
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