JPS6488258A - Comparator - Google Patents

Comparator

Info

Publication number
JPS6488258A
JPS6488258A JP24634787A JP24634787A JPS6488258A JP S6488258 A JPS6488258 A JP S6488258A JP 24634787 A JP24634787 A JP 24634787A JP 24634787 A JP24634787 A JP 24634787A JP S6488258 A JPS6488258 A JP S6488258A
Authority
JP
Japan
Prior art keywords
inverter
comparison level
input
cmos
resistor
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
JP24634787A
Other languages
Japanese (ja)
Inventor
Hirokazu Tagiri
Akira Sawamura
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.)
Rohm Co Ltd
Original Assignee
Rohm 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 Rohm Co Ltd filed Critical Rohm Co Ltd
Priority to JP24634787A priority Critical patent/JPS6488258A/en
Publication of JPS6488258A publication Critical patent/JPS6488258A/en
Pending legal-status Critical Current

Links

Landscapes

  • Measurement Of Current Or Voltage (AREA)
  • Manipulation Of Pulses (AREA)

Abstract

PURPOSE:To enable the minute setting of a comparison level and thereby to enable the reduction of nonuniformity of the comparison level and the increase of a packaging density, by a method wherein the output side of a first inverter is fed back to the input side thereof to make it operate as a buffer amplifier. CONSTITUTION:A device is constituted by a first inverter 2 constructed of CMOS and a second inverter 3 constructed also of CMOS, and it receives an input signal through a capacitor 4 for input and a resistor 5. The inverter 2 has a resistor 6 for feeding back the output side to the input side and so operates as a buffer amplifier, a threshold value of which is determined by the ratio in the number of elements or in gate areas between P-channel transistors Trp and N-channel transistors Trn or between transistors in connections reverse thereto. By constituting the device by the two inverters 2 and 3 having different threshold values as stated above, a comparison level can be set on the basis of the difference between these threshold values. As the result, the comparison level of a comparator can be set minutely without using a large number of resistors.
JP24634787A 1987-09-30 1987-09-30 Comparator Pending JPS6488258A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP24634787A JPS6488258A (en) 1987-09-30 1987-09-30 Comparator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP24634787A JPS6488258A (en) 1987-09-30 1987-09-30 Comparator

Publications (1)

Publication Number Publication Date
JPS6488258A true JPS6488258A (en) 1989-04-03

Family

ID=17147207

Family Applications (1)

Application Number Title Priority Date Filing Date
JP24634787A Pending JPS6488258A (en) 1987-09-30 1987-09-30 Comparator

Country Status (1)

Country Link
JP (1) JPS6488258A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05203681A (en) * 1992-01-28 1993-08-10 Fujikura Ltd Semiconductor sensor
JPH05203682A (en) * 1992-01-28 1993-08-10 Fujikura Ltd Semiconductor sensor

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60205264A (en) * 1984-03-30 1985-10-16 Citizen Watch Co Ltd Voltage comparison circuit

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60205264A (en) * 1984-03-30 1985-10-16 Citizen Watch Co Ltd Voltage comparison circuit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05203681A (en) * 1992-01-28 1993-08-10 Fujikura Ltd Semiconductor sensor
JPH05203682A (en) * 1992-01-28 1993-08-10 Fujikura Ltd Semiconductor sensor

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