Patent ID: 8160509

Claim:
An external data transceiver for coupling between a wireless communication device and a physical device, the external data transceiver comprising: a transmit circuit for frequency shifting a received signal having a first frequency from the wireless communication device to a second frequency receivable by the physical device; a receive circuit for frequency shifting a received signal having a third frequency from the physical device to a fourth frequency receivable by the wireless communication device; and a switch for selectively coupling one of the transmit circuit and the receive circuit to the physical device, wherein the transmit circuit includes: a first band-pass filter for filtering the received signal; a transmit mixer for mixing a filtered signal from the first bandpass filter with a local oscillator signal, thereby generating a second frequency signal; a driver amplifier for amplifying the second frequency signal, thereby generating an amplified signal; at least a second band-pass filter for filtering at least one of the second frequency signal and the amplified signal; a power booster for boosting a power of the amplified signal; and a coupler and low pass filter for filtering an output of the power booster and providing that filtered output to the switch.