CPC H03F 3/193 (2013.01) [H03D 7/125 (2013.01); H03D 7/18 (2013.01); H03F 2200/336 (2013.01); H03F 2200/451 (2013.01)] | 20 Claims |
1. An amplifier circuit configured to amplify a plurality of sinusoid signals, wherein the sinusoid signals have a relative phase difference to each other, the amplifier circuit comprising:
a first sequence of at least three transistor amplifiers, wherein:
a first terminal of each transistor amplifier of the first sequence is configured to receive one respective signal of the plurality of sinusoid signals; and
a second terminal of each transistor amplifier of the first sequence is connected to a current source;
a second sequence of at least three transistor amplifiers comprising a first transistor amplifier and a last transistor amplifier, wherein:
a second terminal of each transistor amplifier of the second sequence is connected to a third terminal of one respective transistor amplifier of the first sequence;
a third terminal of each transistor amplifier of the second sequence is connected to a supply voltage; and
a first terminal of each transistor amplifier of the second sequence is connected to the third terminal of a next transistor amplifier of the second sequence;
wherein the first terminal of the last transistor amplifier is connected to the third terminal of the first transistor amplifier; and
wherein the first terminals are bases or gates, the second terminals are emitters or sources, and the third terminals are collectors or drains.
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