JPS6450618A - Driving circuit for capacitive load - Google Patents

Driving circuit for capacitive load

Info

Publication number
JPS6450618A
JPS6450618A JP20746287A JP20746287A JPS6450618A JP S6450618 A JPS6450618 A JP S6450618A JP 20746287 A JP20746287 A JP 20746287A JP 20746287 A JP20746287 A JP 20746287A JP S6450618 A JPS6450618 A JP S6450618A
Authority
JP
Japan
Prior art keywords
capacitive load
discharging
power supply
charging
driving
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
JP20746287A
Other languages
Japanese (ja)
Inventor
Kazumi Kojima
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.)
NEC Corp
Original Assignee
NEC 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 NEC Corp filed Critical NEC Corp
Priority to JP20746287A priority Critical patent/JPS6450618A/en
Publication of JPS6450618A publication Critical patent/JPS6450618A/en
Pending legal-status Critical Current

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Abstract

PURPOSE:To make the size of driving power supply small by connecting the driving power supply, a switching element, an inductance element and a capacitive load in series, and switching timely the switch element while monitoring a voltage of the capacitive load thereby charging/discharging the capacitive load very efficiently. CONSTITUTION:A control circuit S controls a circuit where the driving DC power supply 1 having a voltage VS, a reed relay 2, a coil 3 and the capacitive load 4 are connected. Then an external control signal SI with a high level commands the charging of the capacitive load 4 and that with a low level commands the discharging. An operational amplifier A1 of the control circuit S forms a differentiation device together with a capacitor C3 and a resistor R3 and its output is VD. When the differentiation output VD being the result of differentiating and inverting the charging voltage VC is again '0', the reed relay 2 is opened. Then the driving circuit for the capacitive load 4 has only the reactive element only in case of both charging and discharging. Then the energy is not consumed and the energy charged in the capacitive load 4 is regenerated all to the power supply at the time of discharging.
JP20746287A 1987-08-20 1987-08-20 Driving circuit for capacitive load Pending JPS6450618A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP20746287A JPS6450618A (en) 1987-08-20 1987-08-20 Driving circuit for capacitive load

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP20746287A JPS6450618A (en) 1987-08-20 1987-08-20 Driving circuit for capacitive load

Publications (1)

Publication Number Publication Date
JPS6450618A true JPS6450618A (en) 1989-02-27

Family

ID=16540169

Family Applications (1)

Application Number Title Priority Date Filing Date
JP20746287A Pending JPS6450618A (en) 1987-08-20 1987-08-20 Driving circuit for capacitive load

Country Status (1)

Country Link
JP (1) JPS6450618A (en)

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