CPC H03H 11/04 (2013.01) [B60R 16/02 (2013.01); H03F 3/19 (2013.01); H03F 2200/451 (2013.01)] | 12 Claims |
1. A high-frequency amplifier for an active EMI filter comprising a symmetric emitter-follower output stage for providing an output current with two bipolar transistors in a symmetric complementary pair configuration, an input stage driving the output stage, a sense resistor through which the output current flows, a voltage feedback loop for feeding back a voltage measured across the sense resistor to the input stage, wherein the high-frequency amplifier comprises a voltage reference defining a potential difference between bases of the bipolar transistors, wherein the voltage reference has a negative temperature coefficient.
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