Patent ID: 7643803

Claim:
An integrated circuit comprising: a transmitter portion configured to transmit a signal; and a transmitter power control configured to estimate power of the signal, wherein the transmitter power control utilizes: a sampler that utilizes a sub-sampling technique to tap a voltage output of a power amplifier included in the transmitter portion and operates at a frequency that is significantly lower than a frequency, at which, the power amplifier operates; and a mixer to estimate power of the signal; a low pass filter (LPF), wherein the LPF utilizes a switched capacitor scheme to estimate power of the wireless signal; a comparator, wherein the comparator compares an output of the LPF to a band gap reference; an up/down counter; a receiver configured to receive a wireless signal and wherein operation of the mixer is shared by the receiver; and wherein the transmitter power control employs an averaging technique to estimate power of the signal, wherein the averaging technique utilizes an absolute value of a voltage signal with respect to a common mode signal to produce a DC average to the common mode signal.