Frequency mixer device and method for compensating DC offset

A method for compensating a DC offset included in a multiplied signal obtained by amplifying an input signal by an input cell and mixing the amplified input signal with a switching signal by a switching cell, the method comprising:

• detecting a level of the input signal;
• generating a compensation signal for compensating the DC offset based on the level detection signal;
• supplying the compensation signal to the input cell so as to compensate a DC offset included in the multiplied signal;
• and
• mixing the output of the input cell with the switching signal by the switching cell, so as to output the multiplied signal.

A method for compensating a DC offset included in a multiplied signal obtained from a mixing circuit by amplifying an input signal by an input cell and mixing the amplified input signal with a switching signal by a switching cell, the method comprising:

• detecting a level of the input signal;
• generating a compensation signal for compensating the DC offset based on the level detection signal;
• supplying the compensation signal to the mixing circuit prior to mixing the output of the input cell with the switching signal by the switching cell;
• and
• mixing the output of the input cell with the switching signal by the switching cell, so as to output the multiplied signal.