公开(公告)号：JPH095363A

公开(公告)日：1997-01-10

申请号：JP15438995

申请日：1995-06-21

Applicant: ADVANCED MICRO DEVICES INC

Inventor： SERUJIO AARU RAMAIYAATSU

IPC: G01R19/165

Abstract: PURPOSE: To regulate the hysteresis level independently by regulating a variable state finely using a plurality of comparators. CONSTITUTION: Two comparators 70, 72 and a latch 74 are employed. An input voltage is connected through a signal line 80 with the negative input of a comparator 70 and the positive input of a comparator 74. A reference voltage VREF2 is connected through a signal line 76 with the positive input of the comparator 70 while a reference voltage VREF1 is connected through a signal line 78 with the negative input of the comparator 72. Output of the comparator 72 is connected with the reset input RS of the latch 74. Output and inverted output of the circuit are provided, respectively, from Q and Q/outputs of the latch 74. For example, the output of the latch 74 makes a transition from low to high level when the input voltage signal increases from a level lower than the reference voltage VREF1 to a level higher than the reference voltage VREF1.