Full-difference E-type power amplifier
A power amplifier, fully differential technology, used in differential amplifiers, power amplifiers, DC-coupled DC amplifiers, etc., can solve problems such as reducing power efficiency, suppressing second harmonics, and excessive input signals, reducing substrate coupling. , the effect of suppressing the second harmonic and suppressing interference
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[0022] The technical solution of the present invention is a specific embodiment, and the embodiment will not be repeated here. The working process of the present invention is described in detail below.
[0023] refer to figure 2, BIAS1 and BIAS2 are biased at 1.2V, BIAS3 and BIAS4 are biased at 800mV, and the transistors in the pre-amplification stage and power amplifier stage are respectively biased at the boundary of the amplification region and the saturation region by adjusting the bias resistors reasonably. The envelope input signal is differentially input through the IN1 terminal and the IN2 terminal, and output from the collector of the first transistor Q1 and the collector of the second transistor Q2 after pre-amplification, forming a fast switching approximate peak pulse signal, driving the differential of the power amplifier stage input terminal, and output to the antenna from OUT1 and OUT2 terminals after power amplification. When working in the pre-amplification...
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