Title:
COMPARATOR
Document Type and Number:
Japanese Patent JP3914463
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a comparator circuit operable at high speed in which an input voltage range is made wider than that of a differential amplifier type comparator.
SOLUTION: The comparator has a transistor pair normally conductive and is provided with: a switch means comprising a diode pair for switching a current path depending on the magnitude of a voltage level between an input signal and a comparison voltage; and a means for converting a current into a voltage level, which are placed between emitter terminals of the transistor pair.
Inventors:
Kengo Imagawa
Tokuo Nakajo
Kaoru Arita
Umemura Yoshiharu
Masahiro Imari
Tokuo Nakajo
Kaoru Arita
Umemura Yoshiharu
Masahiro Imari
Application Number:
JP2002154837A
Publication Date:
May 16, 2007
Filing Date:
May 29, 2002
Export Citation:
Assignee:
株式会社日立製作所
株式会社日立ハイテクノロジーズ
株式会社日立ハイテクノロジーズ
International Classes:
G01R19/165; G01R31/28; H03K5/08; H03F3/45; H03K5/24; (IPC1-7): H03K5/08; G01R19/165; G01R31/28; H03F3/45
Domestic Patent References:
| JP9318409A | ||||
| JP3230646A | ||||
| JP49078583A | ||||
| JP54032253A | ||||
| JP63163283A | ||||
| JP4063014A | ||||
| JP62186608A | ||||
| JP63169816A |
Attorney, Agent or Firm:
Akita Haruki