Patent ID: 8497736

Claim:
A driver circuit configured to provide dynamic DC bias and RF signal gain to a base terminal of a Bipolar Junction Transistor (BJT) power device in a power amplifier, the driver circuit comprising: a first transistor with a first current flowing from a first terminal of the first transistor to a second terminal of the first transistor; a second transistor with a second current flowing from a first terminal of the second transistor to a second terminal of the second transistor, wherein the first transistor and the second transistor are in a push-pull configuration; a first current source connected to a first terminal of a first current mirror, wherein the first current source controls the first current; and a second current source connected to a first terminal of a second current mirror, wherein the second current source controls the second current, the dynamic DC bias and the RF signal gain corresponding to a difference between the first current and the second current, wherein changing the ratio of the width of the first transistor to the width of the second transistor provides the dynamic DC bias and the RF signal gain to the base terminal of the Bipolar Junction Transistor (BJT) power device in the power amplifier.