Patent ID: 8253487
Filing Date: 2012-08-28
Classification: H03F,H03G

Abstract:
1. A tracking power supply, comprising: a basic voltage output unit comprising a level providing unit and a level shift unit, the level providing unit configured to provide one or more level outputs, the level shift unit configured to select the level outputs in the level providing unit according to a received first control signal, and output the selected level output as a basic voltage; a linear amplifier, configured to output a compensation voltage according to a second control signal, wherein the compensation voltage is configured to compensate the basic voltage; a current detection unit, configured to detect an output current of the linear amplifier, and output a third control signal; and a switch tracking current source, configured to receive the third control signal, adjust an output current, implement low-frequency tracking of a load current, and reduce an effective value of the output current of the linear amplifier, wherein the linear amplifier and the switch tracking current source are connected in parallel and then connected in series with the level shift unit.