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The means to speed-up the retuning of the loop filter unit out voltage with using the methods of equivalent capacitance multiplier on the basis of the schemes with an additional current source in the charge pump current source (CPCS) unit have been offered. The diagrams of the transient processes of output frequency auto-tuning, verifying that the use of the offered solutions for control by an additional current source of CPCS unit permits to bring nearer the transient process to the optimal one with respect to high speed, have been presented.

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