JPS54109882A - Battery voltage detecting circuit - Google Patents

Battery voltage detecting circuit

Info

Publication number
JPS54109882A
JPS54109882A JP1720978A JP1720978A JPS54109882A JP S54109882 A JPS54109882 A JP S54109882A JP 1720978 A JP1720978 A JP 1720978A JP 1720978 A JP1720978 A JP 1720978A JP S54109882 A JPS54109882 A JP S54109882A
Authority
JP
Japan
Prior art keywords
lower limit
limit values
battery voltage
fluctuations
detecting 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
Application number
JP1720978A
Other languages
Japanese (ja)
Inventor
Yoshimutsu Ono
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP1720978A priority Critical patent/JPS54109882A/en
Publication of JPS54109882A publication Critical patent/JPS54109882A/en
Priority to JP1983152602U priority patent/JPS5995270U/en
Pending legal-status Critical Current

Links

Landscapes

  • Measurement Of Current Or Voltage (AREA)

Abstract

PURPOSE: To eliminate the fluctuations in set upper and lower limit values even against changes in ambient temperature by accurately setting the upper and lower limit values of battery voltage with a Schmitt circuit and using Zener diodes of mutually different polarities of temperature coefficients.
CONSTITUTION: When the voltage applied to the base of the transistor Tr1 of a Schmitt circuit S is 0 and Tr1 is OFF, VE = RE.VC/(RV3 + RE) holds. When the base voltage of Tr1 becomes V1 > VE, the collector current of Tr1 begins to flow. Then, a positive feedback loop is created between the Tr1, Tr2 and Tr1 goes ON and Tr2 OFF. Next, when V1 lowers, Tr1 goes OFF and Tr2 ON and VE.VC (Rv1 + RE) holds. Hence, when Rv1 > Rv2 is estabilished, VE becomes the upper and lower limit values of battery. At this time, the temperature change of VC is made 0 by the temperature coefficients of Zener diodes Z1, Z2, whereby the fluctuations of the upper and lower limit values are prevented.
COPYRIGHT: (C)1979,JPO&Japio
JP1720978A 1978-02-16 1978-02-16 Battery voltage detecting circuit Pending JPS54109882A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP1720978A JPS54109882A (en) 1978-02-16 1978-02-16 Battery voltage detecting circuit
JP1983152602U JPS5995270U (en) 1978-02-16 1983-09-29 Battery voltage detection circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1720978A JPS54109882A (en) 1978-02-16 1978-02-16 Battery voltage detecting circuit

Publications (1)

Publication Number Publication Date
JPS54109882A true JPS54109882A (en) 1979-08-28

Family

ID=11937539

Family Applications (2)

Application Number Title Priority Date Filing Date
JP1720978A Pending JPS54109882A (en) 1978-02-16 1978-02-16 Battery voltage detecting circuit
JP1983152602U Pending JPS5995270U (en) 1978-02-16 1983-09-29 Battery voltage detection circuit

Family Applications After (1)

Application Number Title Priority Date Filing Date
JP1983152602U Pending JPS5995270U (en) 1978-02-16 1983-09-29 Battery voltage detection circuit

Country Status (1)

Country Link
JP (2) JPS54109882A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62138014A (en) * 1985-12-09 1987-06-20 松下電器産業株式会社 Protective circuit for controller
US5412307A (en) * 1992-06-09 1995-05-02 Sony Corporation Residual capacity indicating device

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4895511A (en) * 1972-03-17 1973-12-07

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62138014A (en) * 1985-12-09 1987-06-20 松下電器産業株式会社 Protective circuit for controller
US5412307A (en) * 1992-06-09 1995-05-02 Sony Corporation Residual capacity indicating device

Also Published As

Publication number Publication date
JPS5995270U (en) 1984-06-28

Similar Documents

Publication Publication Date Title
JPS54109882A (en) Battery voltage detecting circuit
JPS57104325A (en) Ecl circuit
JPS57204611A (en) Voltage follower circuit
JPS6439830A (en) A/d converter
JPS5320555A (en) Constant current circuit
JPS54156153A (en) Temperature compensating constant voltage circuit
JPS57132214A (en) Constant voltage circuit
JPS5320554A (en) Constant current circuit
JPS5776916A (en) Output circuit
JPS5515511A (en) Constant current circuit
JPS56168243A (en) Constant-voltage circuit
JPS55608A (en) Bias circuit
JPS5539456A (en) Pulse generation circuit
JPS52133760A (en) Intergrated circuit
JPS52139940A (en) Constant voltage power source device
JPS56154833A (en) Super-regenerative reception system
JPS5580127A (en) Constant-voltage circuit
JPS54137944A (en) Signal processing circuit
JPS57152018A (en) Power supply circuit of negative polarity
JPS5526709A (en) Amplifier circuit
IE41644L (en) Power supply circuits
JPS5521605A (en) Constant current switching circuit
JPS55135917A (en) Constant-voltage circuit
JPS6432709A (en) Constant current source circuit
JPS5333081A (en) Semiconductor light emitting device