Patent ID: 6885248

Claim:
A single-ended differential amplifier circuit comprising: first unit having first and second active devices respectively having first, second, and third terminals, current flowing from the second terminal to the third terminal having its quantity and direction varying dependant on the voltage driven to said first terminal of said first unit, said first and second active devices being N type MOSFET; second unit having third and fourth devices respectively having first, second, and third terminals, current flowing from the second terminal to the third terminal having its quantity and direction varying dependant on the voltage driven to said first terminal of said second unit, said third and fourth active devices are P type MOSFET; and biasing means being connected to said first terminals of said first and third active devices and an input terminal, and being connected to said second terminals of said second and fourth active devices and an output terminal, for determining biasing points of said first and second units, said first and second units operating in a differential relationship with respect to a signal driven to said input terminal, said biasing means determining said biasing points such that one of said first and second units is substantially active.