Patent ID: 6930557

Claim:
A multi-stage amplifier comprising: a first amplifier stage that includes a first input line having a first input end and a second input end, wherein a first signal is input to the first input end; a first input terminal block connected to the second input end; a first amplifier circuit amplifying the first signal; a first output line having a first output end and a second output end, wherein the first signal amplified is output from the first output end; and a first output terminal block connected to the second output end; a second amplifier stage that includes a second input line having a third input end and a fourth input end, wherein a second signal is input to the third input end; a second input terminal block connected to the fourth input end; a second amplifier circuit amplifying the second signal; a second output line having a third output end and a fourth output end, wherein the second signal amplified is output from the third output end; and a second output terminal block connected to the fourth output end; a first capacitor connected between the first output end and the third input end; and a second capacitor connected to any one of the first input terminal block, the first output terminal block, the second input terminal block, and the second output terminal block.