A power amplifier matching circuit , comprising: a first inductor having a first end and a second end, the first end of the first inductor electrically coupled with a power source; a first capacitor having a first end and a second end, the first end of the first capacitor connected with the second end of the first inductor ; a transistor having a collector and an emitter, the transistor connected with the second end of the first capacitor and the second end of the first inductor such that the first capacitor is connected between the collector and the emitter of the transistor , whereby the transistor is configured to amplify a signal input to a base of the transistor; a second inductor having a first end and a second end, the first end of the second inductor connected with the second end of the first inductor ; a first digital variable capacitor having a first end and a second end, the first end of the first digital variable capacitor connected with the second end of the second inductor ; a second digital variable capacitor having a first end and a second end, the first end of the second digital variable capacitor connected with the second end of the second inductor and the first end of the first digital variable capacitor ; a third inductor having a first end and a second end, the first end of the third inductor connected with the second end of the second digital variable capacitor , the second end of the third inductor electrically grounded; and a fourth inductor having a first end and a second end, the first end of the fourth inductor being connected with the second end of the first digital variable capacitor , the second end of the fourth inductor electrically grounded, wherein the second end of the first digital variable capacitor and the first end of the fourth inductor are connected with a RF output. a first inductor having a first end and a second end, the first end of the first inductor electrically coupled with a power source; a first capacitor having a first end and a second end, the first end of the first capacitor connected with the second end of the first inductor ; a transistor having a collector and an emitter, the transistor connected with the second end of the first capacitor and the second end of the first inductor such that the first capacitor is connected between the collector and the emitter of the transistor , whereby the transistor is configured to amplify a signal input to a base of the transistor; a second inductor having a first end and a second end, the first end of the second inductor connected with the second end of the first inductor ; a first digital variable capacitor having a first end and a second end, the first end of the first digital variable capacitor connected with the second end of the second inductor ; a second digital variable capacitor having a first end and a second end, the first end of the second digital variable capacitor connected with the second end of the second inductor and the first end of the first digital variable capacitor ; a third inductor having a first end and a second end, the first end of the third inductor connected with the second end of the second digital variable capacitor , the second end of the third inductor electrically grounded; and a fourth inductor having a first end and a second end, the first end of the fourth inductor being connected with the second end of the first digital variable capacitor , the second end of the fourth inductor electrically grounded, wherein the second end of the first digital variable capacitor and the first end of the fourth inductor are connected with a RF output. <EOS>