Linear power control loop

Details Linear power control loop Linear power control loop

H - Electricity

03

G

H03G 3/20 (2006.01) H03F 1/34 (2006.01) H03G 3/00 (2006.01) H03G 3/30 (2006.01)

Patent

CA 2298928

The present invention presents a closed loop system that utilizes a non-linear reference to control a power amplifier's output power in order to obtain a linear transfer function of dB per adjustment step of a reference input. The closed loop system demonstrates that each non-linear stage/step in an automatic gain control system can create a linear closed loop system when using a non-linear reference. The closed loop system of the present invention eliminates the need for a linearization circuit for the system's power detector. The closed loop system may be used with most power amplifiers when linear control in terms of dB vs. adjustment setting of the input reference signal is desired. Output power in terms of dBms can be accurately set in linear steps where power control over a wide dynamic range is desired.

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