| 摘要 |
<p>A transistor direct-coupled amplifier includes a positive-phase direct-coupled amplifier circuit (1), a second transistor (Q1), and a low-pass filter (LDF). The positive-phase direct-coupled amplifier circuit uses a base of a first transistor (Q2) as an input terminal. The second transistor Q1 has a collector connected to the input terminal of the positive-phase direct-coupled amplifier circuit (1) and an emitter connected to a reference voltage source (2), and the second transistor is complementary with the first transistor. A low-pass filter (LDF) receives an output from the positive-phase direct-coupled amplifier circuit as an input, and the low-pass filter is connected to feed back an output to a base of the second transistor. <IMAGE></p> |
