2results about "Electrial characteristics varying frequency control" patented technology

This application provides an adaptive adjustment method for impedance matching network of a portable radio range extender, comprising: extracting the battery terminal voltage signal and transmit duty cycle from the radio's RF front end; analyzing the battery terminal voltage signal to identify the battery terminal voltage drop pattern and determining the tilt attitude of the drain dynamic load line under the depth of discharge; using an adaptive convergence algorithm to link the rising and falling direction of the tuning capacitor position with the reflection recovery pattern, and when the rising and falling direction is positive, increasing the tuning capacitor position; otherwise, decreasing the position to form a matching network setting; updating the rearranged links of the frequency positions in the memory tuning table according to the matching network setting to generate an adaptive adjustment link; and combining the adaptive adjustment link with the current battery terminal voltage drop pattern and the tilt attitude of the drain dynamic load line to optimize the reflection recovery pattern and determine the impedance mismatch tuning scheme.

A phase-locked loop design is provide that can operate at a plurality of dissimilar supply voltages. By adjusting the frequency range of a PLL based on the power supply voltage, the same PLL design can operate at different supply voltages.