According to the link, the collector-base capacitance is changed due to the change in the base collector voltage which, I believe, is correct. The base-emitter voltage (and consequently its capacitance) is little changed by the audio input voltage.If I understand FM modulators correctly, it's actually the B-E capacitance that is changed by the input signal. I think Collector cap. is changed very little.
I might have been wrong. Makes sense.According to the link, the collector-base capacitance is changed due to the change in the base collector voltage which, I believe, is correct. The base-emitter voltage (and consequently its capacitance) is little changed by the audio input voltage.
The feedback is always less than unity. The transistor has to make up for lossed in the feedback network ( C's and L's connected to the transistor Collector and Emitter )I saw it somewhere that for the LC circuit to oscillate it needs feedback and the feedback must be greater than the unity. I want explanation on what this mean and the component responsible for the feedback. Thanks
What is meant is that the feedback loop gain is greater than unity. The transistor provides the gain for this.I saw it somewhere that for the LC circuit to oscillate it needs feedback and the feedback must be greater than the unity. I want explanation on what this mean and the component responsible for the feedback. Thanks
What FM transmitter, you've forgotten to attach the schematic.
I saw it somewhere that for the LC circuit to oscillate it needs feedback and the feedback must be greater than the unity. I want explanation on what this mean and the component responsible for the feedback. Thanks
That 5pF capacitor I'd mentioned earlier is the culprit.I saw it somewhere that for the LC circuit to oscillate it needs feedback and the feedback must be greater than the unity. I want explanation on what this mean and the component responsible for the feedback. Thanks