Patent ID: 8554156

Claim:
A portable transceiver comprising: an antenna configured to transmit and receive radio frequency (RF) signals; a transmitter configured to upconvert transmit signals using a reference frequency and to send the upconverted transmit signals to the antenna; a receiver configured to receive RF signals from the antenna and to downconvert the received RF signals using the reference frequency; a frequency generator including a phase-locked loop (PLL) arranged to receive high-pass data and low-pass data and to provide the reference frequency, and a voltage controlled oscillator (VCO) having a first set of varactors configured to receive a low-pass tuning voltage based on the low-pass data and a second set of varactors configured to receive a high-pass tuning voltage based on the high-pass data; and a controller configured to direct an arithmetic logic unit to calculate a gain of the VCO by dividing the difference of a second output frequency and a first output frequency by the difference of the second high-pass tuning voltage and the first high-pass tuning voltage.