Systems and methods for detecting local oscillator leakage and image tone in I/Q mixer based transceivers

A method for detecting local oscillator leakage and image tone, comprising:

• supplying an output of a power amplifier of a radio transmitter of a radio transceiver to a squaring circuit of a detector circuit of the radio transceiver to generate an output current, the output of the power amplifier comprising:
• a desired tone;
• a local oscillator leakage tone;
• and
• an image tone;
• the output current of the squaring circuit comprising:
• a direct current (DC) component comprising a function of the desired tone;
• and
• an alternating current (AC) component comprising:
• a function of the local oscillator leakage tone;
• and
• a function of the image tone;
• absorbing, by a DC current absorber of the detector circuit, the DC component of the output current to produce a filtered output of the squaring circuit, wherein the filtered output comprises the function of the local oscillator leakage tone and the function of the image tone;
• and
• detecting the local oscillator leakage tone and the image tone based on the filtered output.