JPS5889879U

JPS5889879U - voltage detection circuit

Info

Publication number: JPS5889879U
Application number: JP15558782U
Authority: JP
Inventors: 岡田　泰仕
Original assignee: セイコーエプソン株式会社
Priority date: 1982-10-14
Filing date: 1982-10-14
Publication date: 1983-06-17
Also published as: JPS5914795Y2

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) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

第１図は、電界効果トランジスタのスレッショルド電圧
を利用した電池電圧検出回路の基本回路。１・・・電源電池、２・・・エンハンスメント形Ｐ形電
界効果トランジスタ、３・・・ドレイン抵抗Ｒ１、Ｅ□
・・・電源電池電圧、・Ｅ２・・・出力電圧。第２図は、第１図の回路のスイッチング特性図。４・・・Ｅ１＝Ｅ２を示す点線、５・・・第１図の回路
のＥ１対Ｅ２の特性曲線（スイッチング特性）、。第３図は、２ｎ個の検出電圧制御素子（ドレイン抵抗）
を用いて電子的に２進信号で検出電圧を制御する電池電
圧検出回路。６・・・制御信号入力回路、７〜８・・・高抵抗、９・
・・２ｂｉｔ２進信号を２２進とする変換回路、１０〜
１３・・・それぞれ異なる抵抗値を有するドレイン抵抗
Ｒｒｉ、　Ｒ５，Ｒｒｘ、　ＲＤｌｓ　　１４〜１７　
・・・ｘンハンスメント形Ｎ形電界効果トランジスタ。第４図は、２ｎ個の検出電圧制御素子（電源電圧分割抵
抗）を用いて電子的に２進信号で検出電圧を制御できる
電池電圧検出回路。１Ｂ・・・相補形ＭＯ３によるアチログ・スイッチ４個
で構成された電子スイッチ回路、１９〜２３・・・電源
電圧分割抵抗。第５図は、複数の検出電圧調整箇所において検出電圧変
化量に２°１．２”ｌ　２２１・・・・・・２°−１の
重みをつける事により直接２進信号で検出電圧の制御を
行なう電池電圧検出回路。２４・・・インバータ、２り、２６・・・電源電圧分割
抵抗、２７・・・並列付加ドレイン抵抗Ｒ５゜第６図は
、２進信号で制御されるはしご形抵抗回路網を利用する
事によって検出電圧の電子的な制御を行なう電池電圧検
出回路。２８・・・Ｒ−２Ｒはしご形抵抗回路網、２９゜３８・
・・それぞれの抵抗値の比が１：２であるような抵抗、
３１〜３３・・・相補形ＭＯ３によるインバータ奪λｎ７ ■−−〉Ｅ。キ　６　図Figure 1 shows the basic circuit of a battery voltage detection circuit that uses the threshold voltage of a field effect transistor. 1... Power supply battery, 2... Enhancement type P-type field effect transistor, 3... Drain resistance R1, E□
...Power supply battery voltage, E2...Output voltage. FIG. 2 is a switching characteristic diagram of the circuit of FIG. 1. 4... Dotted line showing E1=E2, 5... Characteristic curve of E1 vs. E2 (switching characteristics) of the circuit in FIG. Figure 3 shows 2n detection voltage control elements (drain resistance)
A battery voltage detection circuit that electronically controls the detected voltage using a binary signal. 6... Control signal input circuit, 7-8... High resistance, 9.
・Conversion circuit that converts a 2-bit binary signal into 22-decimal notation, 10~
13... Drain resistors Rri, R5, Rrx, RDls each having a different resistance value 14-17
...x enhancement type N-type field effect transistor. FIG. 4 shows a battery voltage detection circuit that can electronically control the detection voltage using a binary signal using 2n detection voltage control elements (power supply voltage dividing resistors). 1B...Electronic switch circuit composed of four attirog switches using complementary MO3, 19-23...Power supply voltage dividing resistor. Figure 5 shows how to directly control the detected voltage using a binary signal by weighting the amount of change in the detected voltage by 2°1.2"l 221...2°-1 at multiple detected voltage adjustment points. 24...Inverter, 26...Power supply voltage dividing resistor, 27...Parallel additional drain resistor R5゜Figure 6 shows a ladder-shaped resistor controlled by a binary signal. A battery voltage detection circuit that electronically controls the detected voltage by using a circuit network. 28...R-2R ladder-shaped resistance network, 29°38.
・Resistance whose resistance value ratio is 1:2,
31 to 33...Inverter takeover λn7 by complementary MO3 ■-->E. Ki 6 Figure

Claims

[Scope of utility model registration request]

The detection voltage control circuit comprises a voltage detection means using a transistor (MOS), a detection voltage control circuit for controlling the voltage detected by the voltage detection means, and a control input means for inputting a control amount by the detection voltage control circuit. , a plurality of resistors formed to divide the power supply voltage and a plurality of MOs.
The voltage divided by the plurality of resistors is applied to the gate electrode of the MOS transistor of the voltage detecting means, and the plurality of MOS transistors are configured to operate based on the signal input by the control amount input means. A voltage detection circuit characterized by being opened and closed.