Preamplifier and post amplifier circuit

Published:2011/6/19 10:39:00 Author:John | Keyword: Preamplifier, post amplifier | From:SeekIC

It is always justified to use an amplifier in the double-balanced mixer circuit. Pre-amp can be more sensitive to the input. When an amplifier (post amplifier) is connected into the passive double-balanced mixer output, it can compensate a loss of 5 ~ 8dB for the passive double-balanced mixer. No matter what, the amplifier can provide a certain amount of isolation for either input or output of the double balanced mixer. The impact caused by the double-balanced mixer from the source or fluctuations in load impedance can be in the liberation. In this case, the amplifier is known as a buffer amplifier.



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