JPS55642A - Time constant circuit - Google Patents

Time constant circuit

Info

Publication number
JPS55642A
JPS55642A JP7321478A JP7321478A JPS55642A JP S55642 A JPS55642 A JP S55642A JP 7321478 A JP7321478 A JP 7321478A JP 7321478 A JP7321478 A JP 7321478A JP S55642 A JPS55642 A JP S55642A
Authority
JP
Japan
Prior art keywords
time constant
circuit
discharge
miller
resistance
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
JP7321478A
Other languages
Japanese (ja)
Inventor
Seiichi Ueda
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 JP7321478A priority Critical patent/JPS55642A/en
Publication of JPS55642A publication Critical patent/JPS55642A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K4/00—Generating pulses having essentially a finite slope or stepped portions
    • H03K4/06—Generating pulses having essentially a finite slope or stepped portions having triangular shape
    • H03K4/08—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape
    • H03K4/48—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape using as active elements semiconductor devices
    • H03K4/50—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape using as active elements semiconductor devices in which a sawtooth voltage is produced across a capacitor
    • H03K4/56—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape using as active elements semiconductor devices in which a sawtooth voltage is produced across a capacitor using a semiconductor device with negative feedback through a capacitor, e.g. Miller integrator

Landscapes

  • Amplifiers (AREA)
  • Continuous-Control Power Sources That Use Transistors (AREA)

Abstract

PURPOSE:To increase further the virtual time constant and then to prevent the misoperation at the time of discharge by supplying via the one-way element the input current of the time constant circuit formed through combination of the Miller circuit and the Miller integrating circuit. CONSTITUTION:Resistance R1 which converts the unput power signal into the current signal is connected in series to transistor circuits Q1 and Q2. The constant voltage between the base and the emitter of these transistors is supplied to amplifier transistor circuits Q3 and Q4 which are connected by Darlington via resistance R2, and then load resistance R3 is connected to Miller capacity C provided between the base and the collector. Thus, a time constant circuit is formed. Then the input current formed by R1 is supplied via diode D. As a result, diode D is adversely biased at the discharge time to be cut off, and thus no discharge current is formed through R1 or Q2. Accordingly, the charging and discharging becomes possible with the microcurrent.
JP7321478A 1978-06-19 1978-06-19 Time constant circuit Pending JPS55642A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7321478A JPS55642A (en) 1978-06-19 1978-06-19 Time constant circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7321478A JPS55642A (en) 1978-06-19 1978-06-19 Time constant circuit

Publications (1)

Publication Number Publication Date
JPS55642A true JPS55642A (en) 1980-01-07

Family

ID=13511680

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7321478A Pending JPS55642A (en) 1978-06-19 1978-06-19 Time constant circuit

Country Status (1)

Country Link
JP (1) JPS55642A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7973568B2 (en) * 2008-09-02 2011-07-05 Zhihao Lao System for providing large RC time constants in integrated circuits

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7973568B2 (en) * 2008-09-02 2011-07-05 Zhihao Lao System for providing large RC time constants in integrated circuits

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