Wireless Circuitry with Scan Amplifier

Wireless circuitry comprising:

• a radio-frequency transmission line path;
• a first low noise amplifier (LNA) communicatively coupled to the radio-frequency transmission line path;
• and
• a second LNA communicatively coupled to the radio-frequency transmission line path, wherein
• the second LNA consumes less power than the first LNA,
• the first LNA and the second LNA are active while the wireless circuitry is in a first state,
• the first LNA is inactive and the second LNA is active while the wireless circuitry is in a second state, and
• the second LNA comprises matching circuitry that is configured to perform impedance matching to the radio-frequency transmission line path while the wireless circuitry is in the second state.

Wireless circuitry comprising:

• a substrate;
• a first receiver on the substrate and including a first amplifier;
• and
• a second receiver on the substrate and including a second amplifier that is configured to scan for a signal that triggers activation of the first receiver, wherein
• the first amplifier is configured to perform impedance matching between the substrate and a matching network external to the substrate while the first receiver is active,
• the second amplifier comprises a common source inverter that includes a first transistor, a second transistor, a capacitor coupled to a first source-drain terminal of the first transistor and a second source-drain terminal of the second transistor, and switching circuitry,
• the switching circuitry switchably couples the capacitor to a gate terminal of the first capacitor and a gate terminal of the second capacitor, and
• the capacitor is configured to perform impedance matching between the substrate and the matching network while the first receiver is inactive.