Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
COMPARATOR CIRCUIT
Document Type and Number:
Japanese Patent JPH02100412
Kind Code:
A
Abstract:

PURPOSE: To secure a large hysteresis, and also, to execute comparison by using a value of a comparison voltage input as it is by feeding back a comparison signal output of a comparator through a diode and a resistance in series.

CONSTITUTION: A resistance R1 is inserted into a line of a comparison voltage input VC of a comparator 1, and also, between the resistance R1 and the comparator 1, a comparison signal output VOUT of the comparator 1 is fed back through diodes D1-Dn of the anode side and a resistance R2 in series. When the comparison signal output VOUT of the comparator 1 is L, the diodes D1-Dn become OFF, and it can be compared with a signal input VIN between said input and the comparison voltage input VC as it is. Also, when the comparator 1 goes to ON once, the diodes D1-Dn become ON, and a voltage inputted to the comparator 1 is different from the comparison voltage input VC and generates a hysteresis. In such a way, when the comparator is OFF, the input signal and the comparison voltage input can be compared, and also, a sufficiently large hysteresis can be secured.


Inventors:
SATO TOSHIBUMI
Application Number:
JP1988000252674
Publication Date:
April 12, 1990
Filing Date:
October 06, 1988
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
TOSHIBA CORP
International Classes:
G01R19/165; H03K3/023; H03K3/0233; H03K5/08; (IPC1-7): G01R19/165; H03K3/023; H03K5/08



 
Previous Patent: JPH02100411

Next Patent: JPH02100413