Patent ID: 7688146

Claim:
A single-ended input to differential-ended output amplifier circuit, comprising: an amplifier for amplifying an input signal into an amplified signal, comprising: an input end for receiving the input signal; and a first output end; and a single-ended input to differential-ended output conversion circuit to convert the amplified signal to a differential signal pair, comprising: a first transistor for receiving the amplified signal having a gate coupled to the first output end, a first terminal coupled to a second output end, and a second terminal coupled to a first node; a second transistor having a gate, a first terminal coupled to a third output end, and a second terminal coupled to the first node; a first capacitor coupled between the second output end and the gate of the second transistor; a first resistor coupled between the second output end and a voltage source; a second resistor coupled between the third output end and the voltage source; and a current source coupled between the first node and a ground, wherein the amplifier further comprises: a first inductor coupled to the input end; a second capacitor coupled between the first inductor and a second node; a second inductor coupled between the voltage source and the first output end; a third transistor having a gate coupled to the second node, a first terminal coupled to the first output end, and a second terminal; and a third inductor coupled between the second terminal of the third transistor and the ground.