Abstract: A buck-boost converter includes a converter, for converting an input voltage into an output voltage, the converter including a plurality of switches and an inductor, and a controller for controlling the plurality of switches. The operation of the controller is driven by a finite state machine configured to receive as input state change signals and to provide as output state signals for driving the controller. The state change signals are generated by a comparator based on a comparison of a replica signal and an error signal, wherein the error signal is computed on the basis of a signal representative of a difference between a characteristic of the converter and a predetermined reference signal, and wherein the replica signal is representative of the current flowing through the inductor.

Abstract: A buck-boost converter includes a converter, for converting an input voltage into an output voltage, the converter including a plurality of switches and an inductor, and a controller for controlling the plurality of switches. The operation of the controller is driven by a finite state machine configured to receive as input state change signals and to provide as output state signals for driving the controller. The state change signals are generated by a comparator based on a comparison of a replica signal and an error signal, wherein the error signal is computed on the basis of a signal representative of a difference between a characteristic of the converter and a predetermined reference signal, and wherein the replica signal is representative of the current flowing through the inductor.

Abstract: A buck-boost converter includes a converter, for converting an input voltage into an output voltage, the converter including a plurality of switches and an inductor, and a controller for controlling the plurality of switches. The operation of the controller is driven by a finite state machine configured to receive as input state change signals and to provide as output state signals for driving the controller. The state change signals are generated by a comparator based on a comparison of a replica signal and an error signal, wherein the error signal is computed on the basis of a signal representative of a difference between a characteristic of the converter and a predetermined reference signal, and wherein the replica signal is representative of the current flowing through the inductor.

Abstract: A system and method for over-voltage protection of a power amplifier is provided. A power amplifier is typically employed in a transmitter to amplify signals prior to transmission via a load; the load may include an antenna or a cable. As a result of an impedance mismatch between the power amplifier and its load, excess power from the power amplifier output fails to reach the load and must be dissipated by one or more transistors in the power amplifier. In severe impedance mismatch conditions, this dissipated power may damage or destroy the transistor(s). An automatic gain control (AGC) is provided for detecting a gain difference between the power amplifier and a replica power amplifier. A gain difference may signal an over-voltage situation. The AGC may be configured to adjust the gain of the power amplifier if a gain difference exists to prevent device damage.

Abstract: A system and method for over-voltage protection of a power amplifier is provided. A power amplifier is typically employed in a transmitter to amplify signals prior to transmission via a load; the load may include an antenna or a cable. As a result of an impedance mismatch between the power amplifier and its load, excess power from the power amplifier output fails to reach the load and must be dissipated by one or more transistors in the power amplifier. In severe impedance mismatch conditions, this dissipated power may damage or destroy the transistor(s). An automatic gain control (AGC) is provided for detecting a gain difference between the power amplifier and a replica power amplifier. A gain difference may signal an over-voltage situation. The AGC may be configured to adjust the gain of the power amplifier if a gain difference exists to prevent device damage.