Patent ID: 6018267
Filing Date: 2000-01-25
Classification: H03F

Abstract:
A high output voltage swing operational amplifier, comprising:first and second power supply terminals having first and second voltages thereon, respectively, wherein the second voltage is greater than the first voltage;a differential input stage coupled between the first power supply terminal and a common terminal;an output stage coupled between the second power supply terminal and the common terminal, and to the differential input stage, said output stage including first and second legs of devices, said first leg of devices includinga first device having a gate coupled to the input stage, a drain, and a source coupled to the common terminal,a second device having a gate coupled to a first terminal having a first intermediate voltage thereon, a drain coupled to an output terminal, and a source coupled to the drain of the second device, anda third device having a gate coupled to a second terminal having a second intermediate voltage thereon, a drain coupled to the output terminal, and a source coupled to the second power supply terminal; said second leg of devices includinga fourth device having a gate coupled to the input stage, a drain, and a source coupled to the common terminal, anda fifth device having a gate coupled to the first terminal, a drain coupled to the second power supply terminal, and a source coupled to the drain of the fourth device.