CPC H03K 5/00006 (2013.01) | 18 Claims |
1. A radiofrequency doubler comprising:
a first transistor and a second transistor connected in parallel between a first differential output and a first terminal of a current source configured to provide a bias current, a second terminal of the current source being connected to a first supply potential;
a third transistor connected between the first terminal of the current source and a second differential output;
a circuit configured to:
apply an AC component of a first differential input and a first DC voltage to a gate of the first transistor,
apply an AC component of a second differential input and the first DC voltage to a gate of the second transistor, and
apply a second DC voltage to a gate of the third transistor; and
a feedback loop configured to control the first voltage or the second voltage from a difference between DC components of the first and second differential outputs so as to equalize the DC components.
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