JPH0142802Y2 - - Google Patents
Info
- Publication number
- JPH0142802Y2 JPH0142802Y2 JP18996982U JP18996982U JPH0142802Y2 JP H0142802 Y2 JPH0142802 Y2 JP H0142802Y2 JP 18996982 U JP18996982 U JP 18996982U JP 18996982 U JP18996982 U JP 18996982U JP H0142802 Y2 JPH0142802 Y2 JP H0142802Y2
- Authority
- JP
- Japan
- Prior art keywords
- radio
- recording
- tape
- connection point
- impedance element
- 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
- 238000003908 quality control method Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
Description
【考案の詳細な説明】
〔考案の利用分野〕
本考案はラジオ付テープレコーダのラジオ−テ
ープ切換回路に関するものである。[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a radio-tape switching circuit for a tape recorder with a radio.
第１図に従来のラジオ付テープレコーダーのラ
ジオ−テープ切換回路の一例を示す。
FIG. 1 shows an example of a radio-tape switching circuit of a conventional tape recorder with radio.
この回路ではマイクジヤツク１より録音時（テ
ープ録音時）録音ヘツド２に流れる録音電流は音
量調節器１９を最大／最小にすることにより、抵
抗R3の両端に電位差が有る為、下記E2 MIN／E2 MAX
の差だけ違つてくる。 In this circuit, the recording current flowing from the microphone jack 1 to the recording head 2 during recording (during tape recording) is determined by the following E 2 MIN / E2MAX
The only difference is the difference.
最小時E2 MIN≒E1・R4／R3＋R4但し・R4＜R3＜R1＜
R2・電力増幅器２２の入力インピーダンスは無
視
最大時E2 MAX≒（E1−E1・R4／R3＋R4）×R2／R1＋R2
＋
E1・R4／R3＋R4
上記の様にテープ録音時、音量調節器を動かす
と録音レベルが変わるという欠点が有つた。 At minimum E 2 MIN ≒E 1・R 4 /R 3 +R 4However , ・R 4 <R 3 <R 1 < R 2・Ignore the input impedance of the power amplifier 22 At maximum E 2 MAX ≒ (E 1 − E 1・R 4 /R 3 +R 4 )×R 2 /R 1 +R 2
＋E 1・R 4 /R 3 ＋R 4As mentioned above, when recording on tape, there was a drawback that the recording level changed when the volume control was moved.
本考案の目的は上記欠点を除き音量調節器を動
かしても録音レベルの変わらない様にすることに
ある。
The purpose of the present invention is to eliminate the above-mentioned drawbacks and to prevent the recording level from changing even if the volume controller is moved.
以下本考案の一実施例を第２図により説明す
る、ラジオ−テープ切換スイツチ４−２の共通端
子を抵抗R3と録音再生スイツチ３−３の録音側
に接続することによりラジオ時は抵抗R3を接地
しテープ時は抵抗R3をシヨートしている為、テ
ープ録音時、音量調節器１９のスイツチ３−３側
の電圧はE1となり電力増幅器の入力インピーダ
ンスがR1とR2に比べて非常に大きい為、音量調
節器１９を最大にしてもE2≒E1となり音量調節
器１９を動かすことによる録音レベルの変化は無
くなる。
An embodiment of the present invention will be described below with reference to FIG. 2. By connecting the common terminal of the radio-tape selector switch 4-2 to the resistor R3 and the recording side of the recording/playback switch 3-3 , the resistor R 3 is grounded and the resistor R 3 is shorted when recording with tape. Therefore, when recording with tape, the voltage on the switch 3-3 side of the volume controller 19 becomes E 1 , and the input impedance of the power amplifier is compared to R 1 and R 2. is very large, so even if the volume adjuster 19 is set to the maximum, E 2 ≈E 1 and there is no change in the recording level by moving the volume adjuster 19.
本考案によればテープ録音時に音量調節器を動
かしても録音レベルが変わらないという効果が有
る。
According to the present invention, there is an effect that the recording level does not change even if the volume controller is moved during tape recording.
第１図は従来のラジオ付テープレコーダのラジ
オ−テープ切換回路図、第２図は本考案の一実施
例の同じくラジオ−テープ切換回路図である。
１……マイクジヤツク、２……録音再生ヘツ
ド、３−１〜３−３……録音再生切換スイツチ、
４−１〜４−３……ラジオテープ切換スイツチ、
１９……音量調節器、２２……電力増幅器、R1
〜R4……抵抗。
FIG. 1 is a radio-tape switching circuit diagram of a conventional tape recorder with radio, and FIG. 2 is a similar radio-tape switching circuit diagram of an embodiment of the present invention. 1... Microphone jack, 2... Recording/playback head, 3-1 to 3-3... Recording/playback selector switch,
4-1 to 4-3...Radio tape selection switch,
19...Volume adjuster, 22...Power amplifier, R 1
~R 4 ...Resistance.
Claims (1)
かつ音量調節器と音質調節器が並列に接続されて
おり、その接続点の一端と録音増幅器間にインピ
ーダンス素子Ａを有し、録音増幅器と前記インピ
ーダンス素子の接続点よりラジオ時、接地に録音
時前記２個の調節器の接続点の他端にインピーダ
ンス素子Ｂが接続され、かつ上記接続点の他端と
接地間に録音時に、インピーダンス素子Ｃを有す
る、ラジオ付テープレコーダにおいて、前記イン
ピーダンス素子Ｂをテープレコーダー時、ラジオ
−テープ切換スイツチでシヨートしたことを特徴
とするラジオ付テープレコーダーのラジオ−テー
プ切換回路。 It has a recording amplifier, volume control and blue quality control,
A volume controller and a tone quality controller are connected in parallel, and an impedance element A is provided between one end of the connection point and the recording amplifier, and the connection point between the recording amplifier and the impedance element is connected to the ground during radio and during recording. In a tape recorder with a radio, an impedance element B is connected to the other end of the connection point of the two regulators, and has an impedance element C between the other end of the connection point and ground during recording. A radio-tape switching circuit for a tape recorder with a radio, characterized in that when the tape recorder is used, a radio-tape switching switch is used.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18996982U JPS59138100U (en) | 1982-12-17 | 1982-12-17 | Radio-tape switching circuit for tape recorder with radio |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18996982U JPS59138100U (en) | 1982-12-17 | 1982-12-17 | Radio-tape switching circuit for tape recorder with radio |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59138100U JPS59138100U (en) | 1984-09-14 |
| JPH0142802Y2 true JPH0142802Y2 (en) | 1989-12-13 |
Family
ID=30409442
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18996982U Granted JPS59138100U (en) | 1982-12-17 | 1982-12-17 | Radio-tape switching circuit for tape recorder with radio |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59138100U (en) |
-
1982
- 1982-12-17 JP JP18996982U patent/JPS59138100U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59138100U (en) | 1984-09-14 |
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