JPS5763928A - Comparing circuit for ad converter - Google Patents

Comparing circuit for ad converter

Info

Publication number
JPS5763928A
JPS5763928A JP14032380A JP14032380A JPS5763928A JP S5763928 A JPS5763928 A JP S5763928A JP 14032380 A JP14032380 A JP 14032380A JP 14032380 A JP14032380 A JP 14032380A JP S5763928 A JPS5763928 A JP S5763928A
Authority
JP
Japan
Prior art keywords
current
turns
output
constitution
collector
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
JP14032380A
Other languages
Japanese (ja)
Inventor
Atsushi Shibata
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP14032380A priority Critical patent/JPS5763928A/en
Publication of JPS5763928A publication Critical patent/JPS5763928A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
    • H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
    • H03K17/60—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being bipolar transistors
    • H03K17/602—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being bipolar transistors in integrated circuits

Landscapes

  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Analogue/Digital Conversion (AREA)
  • Manipulation Of Pulses (AREA)

Abstract

PURPOSE:To simplify circuit constitution and to enable a direct connection with an I<2>L, by connecting the collector of a transistor (TR), connected to the output of an operational amplifier, to the input of a logical circuit composed of the I<2>L, and by controlling the logical circuit. CONSTITUTION:A voltage for comparison from a terminal 27 is applied to an operational amplifier 21, whose output is applied to the base of a TR22. The emitter output of the TR22 is passed through a resistance 23 to form a feedback loop; only when the comparison voltage applied to the terminal 27 is positive, the TR22 operates as a current source and when negative, the TR22 turns off. The collector current of the TR22 absorbs the collector current of the injector IJ current supply TR24a of an I<2>L logical circuit 24 and a TR24b for an inverter has no base current, so that it turns off. When the comparison voltage is negative, no current flows to the TR22, so the IJ current of the I<2>L24 drives the TR24b, which turns on. Thus, a current output comparator of simple constitution which can be connected directly to the I<2>L is constituted without using a special interface circuit.
JP14032380A 1980-10-06 1980-10-06 Comparing circuit for ad converter Pending JPS5763928A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14032380A JPS5763928A (en) 1980-10-06 1980-10-06 Comparing circuit for ad converter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14032380A JPS5763928A (en) 1980-10-06 1980-10-06 Comparing circuit for ad converter

Publications (1)

Publication Number Publication Date
JPS5763928A true JPS5763928A (en) 1982-04-17

Family

ID=15266138

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14032380A Pending JPS5763928A (en) 1980-10-06 1980-10-06 Comparing circuit for ad converter

Country Status (1)

Country Link
JP (1) JPS5763928A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62263721A (en) * 1986-05-09 1987-11-16 Mitsubishi Electric Corp D-a converter
JPS63309021A (en) * 1987-06-10 1988-12-16 Nec Corp Voltage comparator
JPS6477315A (en) * 1987-09-18 1989-03-23 Nec Corp Voltage comparator

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62263721A (en) * 1986-05-09 1987-11-16 Mitsubishi Electric Corp D-a converter
JPS63309021A (en) * 1987-06-10 1988-12-16 Nec Corp Voltage comparator
JPS6477315A (en) * 1987-09-18 1989-03-23 Nec Corp Voltage comparator

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