less than discrete tuners they can be used in digital tv sets and portable handheld tv devices application_number US 56312406 A description this invention is to provide a highly integrated silicon tuner which is implemented on a single integrated circuit however uses of some external components in the integrated tuner or on the module of it are obviously allowable and may result in an equivalent and slightly better circuit performance the differential circuit design is used in this invention in all the circuits wherever it is suitable to reject the common mode sources and even order nonlinear distortions and therefore all issues related to even order nonlinear distortions and even number harmonics should be addressed mainly by careful differential circuit designs and proper layout techniques the following definitions and representations are used in this context which also covers the section of claims a quadrature signal represents a complex signal which has an in phase component and a quadrature component in a quadrature signal processing circuit block i represents an in phase component or path and q a quadrature component or path a total i q mismatch is conveniently defined to represent an equivalent total of i q amplitude mismatch and phase error the total i q mismatch satisfies the relationship of a 20 log 10 b where b in percentage is the total i q mismatch and a in decibel db is a frequency crosstalk of a mirror signal to a desired signal a frequency band represents a frequency range where a radio frequency.