| 摘要 |
Double balanced mixers (100) having transistor pairs (112,114,122,124) are affected by area mismatches between the transistors. The area mismatches can be represented as a ratio between the mixer core transistors that is directly related to voltage. Thus, an input voltage (102) into one of the mixer core transistors in a transistor pair can compensate for the area mismatch. The compensation is achieved by a voltage track and hold feedback loop created by operational amplifier (162), to one of the mixer core transistors. |
