Patent ID: 8711831

Claim:
RF-transceiver front-end comprising: a. a Power Amplifier (PA) output stage comprising a transistor cascade circuitry that acts in open-drain-configuration during broadcast (TX) period as a common-gate-transistor with constant biasing, and acts in the open-drain-configuration during the receive (RX) period to change potential of the gate of the transistor cascade circuitry such that the path utilized during the TX period from the antenna is isolated; and b. a Low Noise Amplifier (LNA) input stage comprising: a p-channel metal oxide semiconductor field effect transistor which transistor is in common-gate configuration and its bulk changes the bulk's voltage-potential from a level equal to the source voltage potential to a level above the source voltage potential of this PMOSFET, wherein the RF-transceiver front-end provides direction control for Time Division Multiple Access Communication (TDMA) for a quadband ISM transceiver implemented on a single integrated circuit.