Title:
【発明の名称】拡大された同相入力電圧レンジを有するコンパレ―タ
Document Type and Number:
Japanese Patent JP2540593
Kind Code:
B2
Abstract:
A comparator comprising two differential input stages (Q1 to Q4 and Q5 to Q8) which are connected in parallel and fed by a common constant circuit source (QB) whose current is passed either to both or only to the one or only to the other differential input stage, depending on whether the common-mode input voltage of the comparator is within, above or below a voltage range that is between the voltage values of the two poles (VC, VE) of a supply voltage source (B) of the comparator, and comprising a common current mirror circuit (Q9, Q10) which is associated with the outputs of both differential input stages and from which the comparator output signal is derived. At least one (Q1 to Q4) of the two differential input stages operates in common-base connection, with this differential input stage (Q1 and Q4) receiving its supply current from the common-mode input voltage source.
Inventors:
PETORU RASUKI
Application Number:
JP9666288A
Publication Date:
October 02, 1996
Filing Date:
April 19, 1988
Export Citation:
Assignee:
ESU JII ESU TOMUSON MAIKUROEREKUTORONIKUSU GMBH
International Classes:
H03K5/08; G01R19/00; G01R19/165; H03K5/24; (IPC1-7): G01R19/165; H03K5/08
Other References:
【文献】米国特許4300063(US,A)
Attorney, Agent or Firm:
Azusa Yuzo