Patent ID: 8237502
Filing Date: 2012-08-07
Classification: H03F

Abstract:
1. An amplifier comprising: a first transistor and a second transistor which are connected in series between first and second power supplies and generate a first current; an amplifier unit; and a resistor, wherein the amplifier unit includes a third transistor and a fourth transistor, the third transistor being connected in a current mirror configuration to the second transistor and generating a second current corresponding to the first current, the fourth transistor generating an output signal based on an input signal and generating a control voltage according to the second current so as to control the first transistor; and the resistor is connected in series to at least one of the first to fourth transistors, wherein the first and fourth transistors are P-type Metal Oxide Semiconductor (MOS) transistors, and the second and third transistors are N-type MOS transistors.