JPS62111665U - - Google Patents
Info
- Publication number
- JPS62111665U JPS62111665U JP20301785U JP20301785U JPS62111665U JP S62111665 U JPS62111665 U JP S62111665U JP 20301785 U JP20301785 U JP 20301785U JP 20301785 U JP20301785 U JP 20301785U JP S62111665 U JPS62111665 U JP S62111665U
- Authority
- JP
- Japan
- Prior art keywords
- input signal
- drive signal
- signal
- level
- signal output
- 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
- 230000003321 amplification Effects 0.000 claims description 4
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000010354 integration Effects 0.000 description 1
Landscapes
- Measurement Of Current Or Voltage (AREA)
Description
第１図は本考案の一実施例の低電圧駆動の携帯
用カセツトテープレコーダにおけるレベルメータ
回路の回路図、第２図はこのレベルメータ回路の
電源検出・コントロール回路における出力電圧を
示す図、第３図は本考案の応用例を示すブロツク
図、第４図は従来のレベルメータ回路を示すブロ
ツク図である。
４……電圧増幅回路、５……電流変換・積分回
路、６……ＬＥＤレベル表示回路、７……電源検
出・コントロール回路、Ｔｒ２……増幅用のトラ
ンジスタ、Ｔｒ３……電流変換用のトランジスタ
、Ｔｒ４〜Ｔｒ８……スイツチ用のトランジスタ
、Ｔｒ９……制御用のトランジスタ、Ｄ３〜Ｄ７
……発光ダイオード。
Fig. 1 is a circuit diagram of a level meter circuit in a low voltage driven portable cassette tape recorder according to an embodiment of the present invention; Fig. 2 is a diagram showing the output voltage of the power supply detection/control circuit of this level meter circuit; FIG. 3 is a block diagram showing an application example of the present invention, and FIG. 4 is a block diagram showing a conventional level meter circuit. 4... Voltage amplification circuit, 5... Current conversion/integration circuit, 6... LED level display circuit, 7... Power supply detection/control circuit, Tr 2 ... Transistor for amplification, Tr 3 ... Current conversion circuit Transistors, Tr 4 to Tr 8 ... transistors for switches, Tr 9 ... transistors for control, D 3 to D 7
...Light emitting diode.
Claims (1)
で増幅された入力信号を入力してこの入力信号に
応じた駆動信号を出力する駆動信号出力手段と、
この駆動信号出力手段から出力された駆動信号に
基づいて前記入力信号のレベルを表示する表示手
段と、前記入力信号のレベルの低下に応じて上昇
する制御信号を生成し前記駆動信号出力手段に入
力される入力信号に重畳する電圧制御手段とを備
えていることを特徴とするレベルメータ回路。 an amplification means for amplifying an input signal; a drive signal output means for inputting the input signal amplified by the amplification means and outputting a drive signal according to the input signal;
a display means for displaying the level of the input signal based on the drive signal output from the drive signal output means; and a display means for generating a control signal that increases in response to a decrease in the level of the input signal and inputting the control signal to the drive signal output means. 1. A level meter circuit comprising voltage control means for superimposing an input signal on an input signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20301785U JPS62111665U (en) | 1985-12-29 | 1985-12-29 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20301785U JPS62111665U (en) | 1985-12-29 | 1985-12-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62111665U true JPS62111665U (en) | 1987-07-16 |
Family
ID=31167946
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20301785U Pending JPS62111665U (en) | 1985-12-29 | 1985-12-29 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62111665U (en) |
-
1985
- 1985-12-29 JP JP20301785U patent/JPS62111665U/ja active Pending
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