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Subject: self regulating transmitter stages using varicap diodes

Date: 03/10/01 at 3:46 PM
Posted by: Robert Dugour
E-mail: Info@dugourelectronicsalmere.nl
Message Posted:

Dear readers,
I have been busty with the desing of a lowfrequency transmitter. The final antenne coil is connected to the output with a cable of variable length. Introducing a variable capacaty into the circuit. I like to design a circuit that compensates the cable length in the cicuitry.
For instance a High impedance Voltage follower, followed by a bridge rectifier and a varicap diode. In this case the antenna voltage is driving the varicap so that the antanne voltage will always be at maximum. Is this done already?
ARe ther technical reviews odf this type of circuitries?

Many thanks in advance

Robert


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