JPS6040113U - Differential amplifier power supply noise prevention circuit - Google Patents
Differential amplifier power supply noise prevention circuitInfo
- Publication number
- JPS6040113U JPS6040113U JP13169483U JP13169483U JPS6040113U JP S6040113 U JPS6040113 U JP S6040113U JP 13169483 U JP13169483 U JP 13169483U JP 13169483 U JP13169483 U JP 13169483U JP S6040113 U JPS6040113 U JP S6040113U
- Authority
- JP
- Japan
- Prior art keywords
- power supply
- differential amplifier
- supply noise
- noise prevention
- prevention 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.)
- Pending
Links
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図は電池の使用時間と端子電圧との関係を示すグラ
フ、第２図は本考案が通用される差動増幅器の基本構成
例を示す回路図、第３図は本考案の一実施例を示す回路
図である。
１・・・電源端子、４・・・エミッタ共通トランジスタ
対、６・・・カレントミラー回路、９・・・信号入力端
子、１０・・・基準電圧端子、１１・・・出力端子、１
２・・・ＩＣパワーアンプ、１３・・・リファレンス端
子、２１・・・基準電圧低下用抵抗、２２・・・スイッ
チング用ＰＮＰ形トランジスタ、２５・・・電圧検出回
路、２６・・・スイッチング用ＰＮＰ形トランジスタ、
２７．２８・・・分圧抵抗。Figure 1 is a graph showing the relationship between battery usage time and terminal voltage, Figure 2 is a circuit diagram showing an example of the basic configuration of a differential amplifier to which the present invention is applicable, and Figure 3 is an example of an embodiment of the present invention. FIG. DESCRIPTION OF SYMBOLS 1... Power supply terminal, 4... Emitter common transistor pair, 6... Current mirror circuit, 9... Signal input terminal, 10... Reference voltage terminal, 11... Output terminal, 1
2... IC power amplifier, 13... Reference terminal, 21... Reference voltage reduction resistor, 22... PNP type transistor for switching, 25... Voltage detection circuit, 26... PNP for switching type transistor,
27.28...Voltage dividing resistor.
Claims (1)
に基準電圧が供給されて、゛これらの入力信号と基準電
圧との差分を増幅して出力する差動増幅器と、電源電圧
が低下して一定電圧以下となったことを検出する電圧検
出手段と、この電圧検出手段からの検出出力に応じて上
記基準電圧を低−下させる手段とを具備して成る差動増
幅器の電源ノイズ防止回路。An input signal is supplied to one of a pair of differential input terminals, and a reference voltage is supplied to the other. A power supply noise prevention method for a differential amplifier comprising: voltage detecting means for detecting that the reference voltage is below a certain voltage; and means for lowering the reference voltage in accordance with the detection output from the voltage detecting means. circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13169483U JPS6040113U (en) | 1983-08-25 | 1983-08-25 | Differential amplifier power supply noise prevention circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13169483U JPS6040113U (en) | 1983-08-25 | 1983-08-25 | Differential amplifier power supply noise prevention circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6040113U true JPS6040113U (en) | 1985-03-20 |
Family
ID=30297648
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13169483U Pending JPS6040113U (en) | 1983-08-25 | 1983-08-25 | Differential amplifier power supply noise prevention circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6040113U (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50113151A (en) * | 1974-02-15 | 1975-09-05 | ||
| JPS5150632A (en) * | 1974-10-30 | 1976-05-04 | Hitachi Ltd |
-
1983
- 1983-08-25 JP JP13169483U patent/JPS6040113U/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50113151A (en) * | 1974-02-15 | 1975-09-05 | ||
| JPS5150632A (en) * | 1974-10-30 | 1976-05-04 | Hitachi Ltd |
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