Direct coupled biasing circuit for high frequency applications

An apparatus comprising:

• a first-stage transistor circuit configured to generate a high-frequency signal that is passed to a second-stage transistor circuit, the first-stage transistor circuit comprising:
• a conducting trace directly connecting the first-stage transistor circuit to the second-stage transistor circuit;
• a voltage reference circuit comprising a control loop configured to monitor a first biasing voltage and generate a second biasing voltage, wherein the first biasing voltage is a first input to an operational amplifier of the control loop and an output of the operational amplifier is coupled to a gate of a first transistor, wherein the second biasing voltage is formed across the first transistor and fed back as a second input into the operational amplifier, and wherein the operational amplifier and the first transistor form the control loop;
• a reference current source electrically coupled to a reference transistor connected in saturation, the reference current source programmable to control the voltage reference circuit configured to generate the second biasing voltage;
• and
• a resonant circuit configured to pass the second biasing voltage to the second-stage transistor circuit by way of the conducting trace,
• wherein the voltage reference circuit is adjustable to provide adjustment to the first biasing voltage to control the second-stage circuit's drive strength.