Voltage negative feedback offset circuit diagram

Published:2011/7/18 10:36:00 Author:Nancy | Keyword: negative feedback, offset circuit | From:SeekIC

The voltage negative feedback offset circuit is shown as the figure. The bias resistor RB is connected to the transistor collector, which is the difference between it and the fixed offset circuit. At this time the parameters in the circuit has the following relations: Because the UBE is very small and can be ignored, at this time The process of steady working point of the circuit is as below: From the above process, you can see that the change of IC is back along with the increase of temperature, which realizes the role of stabilizing the static working point. To make the the effect of the circuit excellent, you must make RC large enough, only this can cause the UCE change much and deepen the effect of the voltage negative feedback. So this circuit is not suitable for the circuit which uses the transformer as load. Drift resistance value (2~ 1 O) is often chosen as Rc.



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