* Question
| What are the general analysis methods for control circuits? |
* Answer
| (1) When there is no recording signal in the circuit, the DC control voltage U is 0V, _ diode VDl is cut off, VDl has no effect on the circuit operation, and the signal output from the first 4-stage recording amplifier can be added to the second-stage recording amplifier.
(3) When the recording signal in the circuit is relatively large, the DC control voltage U is large, so that the diode VDl is turned on, the larger the recording signal is, the larger the DC control voltage U is, the deeper the VDl is turned on, and the internal resistance of VDl is higher.small. (5) The degree of conduction of the diode VD1 is controlled by the DC control voltage, and the DC control voltage varies with the magnitude of the recording signal in the circuit, so the internal resistance change of the diode VD1 is actually controlled by the size of the recording signal. |
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