Patent ID: 6424183
Filing Date: 2002-07-23
Classification: G01R,G11C

Abstract:
A current comparator, comprising:a first CMOS transistor including a first P-type transistor and a first N-type transistor, and source terminals of the first P-type transistor and N-type transistor being connected to an input signal of the current comparator; a second CMOS transistor including a second P-type transistor and a second N-type transistor, and gate terminals of the second P-type transistor and N-type transistor being connected to the input signal; a diode-configured N-type transistor having a gate-drain terminal and a source terminal which are respectively connected to drain terminals of the second CMOS transistor; the gate-drain terminal of the diode-configured N-type transistor further connected to the gate terminal of the first N-type transistor and the source terminal of the diode-configured N-type transistor further connected to the gate terminal of the first P-type transistor; a third CMOS transistor, the gate terminal of the N-type transistor of the third CMOS transistor connected to the gate-drain terminal of the diode-configured N-type transistor, and the gate terminal of the P-type transistor of the third CMOS transistor connected to the source terminal of the diode-configured N-type transistor; a fourth CMOS transistor whose gate terminals are connected to the output of the third CMOS transistor; and a fifth CMOS transistor whose gate terminals are connected to the output of the fourth CMOS transistor, and the output of the fifth CMOS transistor being the output of the current comparator.