* Question
| What are the working principles of deep circuits? |
* Answer
| 1) VTl and the like constitute an amplifier circuit, which requires good stability for the amplifier. One of them is that the quiescent current of the triode cannot be changed when the temperature changes, that is, the VTl base current cannot change with temperature, otherwiseIt is the job stability is not good.
(2) Transistor VTl has a temperature-related bad characteristic, that is, when the temperature rises, the base current of the triode VT1 will increase, and the higher the temperature, the larger the base current, and vice versa. Obviously, the temperature stability of the triode VTl is notit is good. |
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