JPH0310325U - - Google Patents
Info
- Publication number
- JPH0310325U JPH0310325U JP6924589U JP6924589U JPH0310325U JP H0310325 U JPH0310325 U JP H0310325U JP 6924589 U JP6924589 U JP 6924589U JP 6924589 U JP6924589 U JP 6924589U JP H0310325 U JPH0310325 U JP H0310325U
- Authority
- JP
- Japan
- Prior art keywords
- signal
- peak level
- circuit
- time constant
- detection 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.)
- Granted
Links
- 238000001514 detection method Methods 0.000 claims description 5
- 239000003990 capacitor Substances 0.000 claims description 3
Description
図示した回路は、本考案の選曲回路の一実施例
である。
主な図番の説明、１……磁気ヘツド、２……前
置増幅回路、４……主増幅回路、６……比較回路
、７……第１コンデンサー、８……ピークレベル
検出回路、９……スイツチングトランジスター、
１０……第２コンデンサー、１２……時定数回路
、１３……メーター、１４……メーター駆動回路
、１５……無信号部検出回路、１７……動作切換
回路、２１……制御トランジスター、２４……ミ
ユーテイング用トランジスター。
The illustrated circuit is one embodiment of the music selection circuit of the present invention. Explanation of main figure numbers, 1...Magnetic head, 2...Preamplifier circuit, 4...Main amplifier circuit, 6...Comparison circuit, 7...First capacitor, 8 ...Peak level detection circuit, 9 ...switching transistor,
10...Second capacitor, 12 ...Time constant circuit, 13...Meter, 14...Meter drive circuit, 15...No signal portion detection circuit, 17...Operation switching circuit, 21...Control transistor, 24... ...Transistor for mutating.
Claims (1)
号部を早送り状態にて検出することによつて早送
り状態より再生状態に切換える選曲機能を備えた
テープレコーダーにおいて、磁気ヘツドにより再
生される信号が入力されるとともに該信号のピー
クレベルを検出するピークレベル検出回路と、該
ピークレベル検出回路に接続されているとともに
ピークレベルの信号を所定時間保持する第１及び
第２のコンデンサーを含む時定数回路と、前記時
定数回路より得られる信号に基いてピークレベル
を表示するべくメーターを駆動するメーター駆動
回路と、前記時定数回路より得られる信号に基い
て無信号部を検出する無信号部検出回路とより成
り、選曲動作時前記時定数回路の時定数をピーク
レベル表示動作時に比較して小さくするようにし
たことを特徴とするテープレコーダーの選曲回路
。 In a tape recorder equipped with a song selection function that switches from a fast forward state to a playback state by detecting a no-signal portion between signals recorded on a magnetic tape in a fast forward state, the signal played by the magnetic head is input. a peak level detection circuit that detects the peak level of the signal when the signal is detected; and a time constant circuit that is connected to the peak level detection circuit and includes first and second capacitors that hold the peak level signal for a predetermined time. , a meter drive circuit that drives a meter to display a peak level based on a signal obtained from the time constant circuit, and a no-signal portion detection circuit that detects a no-signal portion based on the signal obtained from the time constant circuit. A music selection circuit for a tape recorder, characterized in that the time constant of the time constant circuit is made smaller during a music selection operation than during a peak level display operation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6924589U JPH0718025Y2 (en) | 1989-06-14 | 1989-06-14 | Tape recorder music selection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6924589U JPH0718025Y2 (en) | 1989-06-14 | 1989-06-14 | Tape recorder music selection circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0310325U true JPH0310325U (en) | 1991-01-31 |
| JPH0718025Y2 JPH0718025Y2 (en) | 1995-04-26 |
Family
ID=31604380
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6924589U Expired - Lifetime JPH0718025Y2 (en) | 1989-06-14 | 1989-06-14 | Tape recorder music selection circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0718025Y2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54116416U (en) * | 1978-02-02 | 1979-08-15 |
-
1989
- 1989-06-14 JP JP6924589U patent/JPH0718025Y2/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54116416U (en) * | 1978-02-02 | 1979-08-15 | ||
| JPS572420Y2 (en) * | 1978-02-02 | 1982-01-16 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0718025Y2 (en) | 1995-04-26 |
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