Patent ID: 8078123

Claim:
A radio frequency (RF) transmission error detection module comprises: an RF envelope detector operably coupled to produce an envelope signal from a transmit RF signal, wherein the envelope signal represents both a local oscillation leakage and in-phase (I) and quadrature (Q) imbalance; signal conversion module operably coupled to convert the envelope signal into an error signal in accordance with baseband processing of the transmit RF signal, wherein the signal conversion module comprises: a differential operational amplifier having a first input, a second input, a first output, and a second output, wherein the first input of the differential amplifier is operably coupled to receive the envelope signal and the second input of the differential amplifier is operably coupled to receive a common mode voltage; and a differential to single-ended operational amplifier having a first input, a second input, and an output, wherein the first input of the differential to single-ended operational amplifier is operably coupled to the second output of the differential operational amplifier and the second input of the differential to single-ended operational amplifier is operably coupled to the first output of the differential operational amplifier, wherein the output of the differential to single-ended operational amplifier provides the error signal; and error detection module operably coupled to determine a local oscillation leakage value and an I and Q imbalance value from the error signal.