JPS6448509A - Time constant circuit - Google Patents

Time constant circuit

Info

Publication number
JPS6448509A
JPS6448509A JP20401387A JP20401387A JPS6448509A JP S6448509 A JPS6448509 A JP S6448509A JP 20401387 A JP20401387 A JP 20401387A JP 20401387 A JP20401387 A JP 20401387A JP S6448509 A JPS6448509 A JP S6448509A
Authority
JP
Japan
Prior art keywords
current
resistive element
time constant
current flowing
source 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.)
Granted
Application number
JP20401387A
Other languages
Japanese (ja)
Other versions
JP2515814B2 (en
Inventor
Yuichi Okubo
Tetsuo Sato
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.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP62204013A priority Critical patent/JP2515814B2/en
Publication of JPS6448509A publication Critical patent/JPS6448509A/en
Application granted granted Critical
Publication of JP2515814B2 publication Critical patent/JP2515814B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

PURPOSE:To increase the time constant by detecting a current flowing to a resistive element being a component of a time constant circuit so as to detect a current flowing to the resistive element and providing a current source circuit forming a current smaller in terms of absolute than the current flowing to the resistive element thereby giving a current being difference between the current flowing to the resistive element and the output current of the current source circuit. CONSTITUTION:The current source circuit detecting a current flowing to a resistive element R2 being a component of a time constant circuit to generate a current smaller in terms of absolute value than the current flowing to the resistive element R2 is provided and a current being a difference between the current flowing to the resistive element R2 and the output current of the current source circuit is given to a capacitor (c). That is, since the charge/discharge current of the capacitor (c) is smaller, the capacitance of the capacitor (c) viewed from the input signal is increased. Thus, the time constant is increased equivalently.
JP62204013A 1987-08-19 1987-08-19 Time constant circuit Expired - Fee Related JP2515814B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62204013A JP2515814B2 (en) 1987-08-19 1987-08-19 Time constant circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62204013A JP2515814B2 (en) 1987-08-19 1987-08-19 Time constant circuit

Publications (2)

Publication Number Publication Date
JPS6448509A true JPS6448509A (en) 1989-02-23
JP2515814B2 JP2515814B2 (en) 1996-07-10

Family

ID=16483326

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62204013A Expired - Fee Related JP2515814B2 (en) 1987-08-19 1987-08-19 Time constant circuit

Country Status (1)

Country Link
JP (1) JP2515814B2 (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6022821A (en) * 1983-07-19 1985-02-05 Sony Corp Feedback type integration circuit

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6022821A (en) * 1983-07-19 1985-02-05 Sony Corp Feedback type integration circuit

Also Published As

Publication number Publication date
JP2515814B2 (en) 1996-07-10

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Legal Events

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LAPS Cancellation because of no payment of annual fees