Patent ID: 7956692

Claim:
A wide-band amplifier circuit with improved gain flatness, comprising: a first resonant load unit connected to an operating power terminal, configured to provide a preset first load and form a preset first resonant point; a second resonant load unit connected to the operating power terminal, configured to provide a preset second load and form a second resonant point set to a frequency different from that of the first resonant point; a first amplification unit configured to receive operating power via the first load of the first resonant load unit, have a first amplification band characteristic determined according to the first resonant point of the first resonant load unit, and amplify an input signal; and a second amplification unit configured to receive operating power via the second load of the second resonant load unit, have a second amplification band characteristic determined according to the second resonant point of the second resonant load unit, and further amplify the amplified input signal outputted from the first amplification unit, wherein the first resonant load unit comprises: a first inductance part having one end connected to the operating power terminal and having a first preset inductance; a first resistor connected between the other end of the first inductance part and the first amplification unit; and a first capacitor connected between the other end of the first inductance part and the ground.