JPH0197457U - - Google Patents
Info
- Publication number
- JPH0197457U JPH0197457U JP19216787U JP19216787U JPH0197457U JP H0197457 U JPH0197457 U JP H0197457U JP 19216787 U JP19216787 U JP 19216787U JP 19216787 U JP19216787 U JP 19216787U JP H0197457 U JPH0197457 U JP H0197457U
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- supplied
- output signal
- amplifier circuit
- level
- 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
- 238000010586 diagram Methods 0.000 description 4
Landscapes
- Signal Processing Not Specific To The Method Of Recording And Reproducing (AREA)
Description
第１図は、本考案のテープレコーダのメータ駆
動回路の第１の実施例を表わす構成図、第２図は
、本考案の第２の実施例のメータ機構を表わす構
成図、第３図は、バリキヤツプの入力電圧―容量
特性を表わすグラフ、第４図は、第１の実施例に
おけるバリキヤツプの容量変化に対するメータ駆
動増幅回路の周波数特性を表わすグラフ、第５図
は、第２図の実施例におけるバリキヤツプの容量
変化に対するメータ駆動増幅回路の周波数特性を
表わすグラフ、第６図は、従来例を表わす構成図
、第７図は、録音再生周波数特性を表わすグラフ
である。
１…入力端子、２…ボリウム、３，４，１５…
増幅回路、５…バイアス発振器、６…録音ヘツド
、７…消去ヘツド、８…演算増幅回路、９…第２
の整流回路、１０…（レベル）メータ、１１…第
１の整流回路、１２…バリキヤツプ、１３…イン
ダクタ、１４…（直列）共振回路、Ａ…録音機構
、Ｂ…メータ機構、Ｒ１〜Ｒ５…抵抗、Ｓ…スイ
ツチ。
1 is a block diagram showing a first embodiment of a meter drive circuit for a tape recorder of the present invention, FIG. 2 is a block diagram showing a meter mechanism of a second embodiment of the present invention, and FIG. 3 is a block diagram showing a meter mechanism of a second embodiment of the present invention. , a graph showing the input voltage-capacitance characteristics of the varicap, FIG. 4 is a graph showing the frequency characteristics of the meter drive amplifier circuit with respect to capacitance changes of the varicap in the first embodiment, and FIG. FIG. 6 is a diagram showing the configuration of a conventional example, and FIG. 7 is a graph showing the recording/playback frequency characteristics. 1...Input terminal, 2...Volume, 3, 4, 15...
Amplifying circuit, 5... Bias oscillator, 6... Recording head, 7... Erasing head, 8... Operational amplifier circuit, 9... Second
rectifier circuit, 10... (level) meter, 11... first rectifier circuit, 12... variable cap, 13... inductor, 14... (series) resonant circuit, A... recording mechanism, B... meter mechanism, R1 to R5 ...Resistance, S...Switch.
Claims (1)
、 このレベル可変手段の出力信号を増幅する第１
の増幅回路と、この増幅回路より供給される信号
を録音する録音ヘツドと、この録音ヘツドにバイ
アス電流を供給するバイアス発振器と、このバイ
アス発振器より消去電流を供給される消去ヘツド
とよりなる録音機構と、 前記第１の増幅回路の出力が供給される第１の
整流回路と、インダクタとバリキヤツプで構成さ
れ前記第１の整流回路の出力信号が供給される共
振回路と、その一方の入力に前記第１の増幅回路
の出力信号が供給され、その他方の負帰還をかけ
た入力に前記共振回路の出力信号が供給される第
２の増幅回路と、この第２の増幅回路の出力信号
を整流する第２の整流回路と、この第２の整流回
路の出力信号が供給されるメータとよりなるメー
タ機構とを備えて構成したことを特徴とするテー
プレコーダのメータ駆動回路。[Claims for Utility Model Registration] Level varying means for varying the level of an input signal; and a first level varying means for amplifying the output signal of the level varying means.
A recording mechanism consisting of an amplifier circuit, a recording head that records the signal supplied from this amplifier circuit, a bias oscillator that supplies a bias current to this recording head, and an erasing head that is supplied with an erasing current from this bias oscillator. a first rectifier circuit to which the output of the first amplifier circuit is supplied; a resonant circuit configured with an inductor and a varicap and to which the output signal of the first rectifier circuit is supplied; a second amplifier circuit to which the output signal of the first amplifier circuit is supplied and the output signal of the resonant circuit is supplied to the other negative feedback input; and a second amplifier circuit that rectifies the output signal of the second amplifier circuit. 1. A meter drive circuit for a tape recorder, comprising: a second rectifier circuit that performs a rectifying circuit; and a meter mechanism to which an output signal of the second rectifier circuit is supplied.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19216787U JPH0197457U (en) | 1987-12-17 | 1987-12-17 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19216787U JPH0197457U (en) | 1987-12-17 | 1987-12-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0197457U true JPH0197457U (en) | 1989-06-28 |
Family
ID=31483040
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19216787U Pending JPH0197457U (en) | 1987-12-17 | 1987-12-17 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0197457U (en) |
-
1987
- 1987-12-17 JP JP19216787U patent/JPH0197457U/ja active Pending
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