Patent ID: 9634629
Date: 2017-04-25
CPC Classifications: G11C,H03F

Claim:
1. A semiconductor amplifier circuit comprising: a first amplifier circuit including a first P-type transistor to which an input signal from an outside is supplied, and a second P-type transistor to which a reference voltage is supplied; a second amplifier circuit including a first N-type transistor to which the input signal is supplied, and a second N-type transistor to which the reference voltage is supplied; a first current mirror circuit connected to a drain of the first P-type transistor; a second current mirror circuit connected to a drain of the second P-type transistor; a third current mirror circuit connected to a drain of the first N-type transistor; a fourth current mirror circuit connected to a drain of the second N-type transistor; a fifth current mirror circuit; a sixth current mirror circuit connected to the first, fourth and fifth current mirror circuits; a seventh current mirror circuit connected to the second, third and fifth current mirror circuits; a first constant current source circuit including a first terminal connected to a power supply terminal and a second terminal connected to a source of the first P-type transistor and to a source of the second P-type transistor; and a second constant current source circuit including a first terminal connected to a ground terminal and a second terminal connected to a source of the first N-type transistor and to a source of the second N-type transistor.