Abstract: An envelope tracking scheme can be used, such as to modulate a supply node of a power amplifier circuit to improve efficiency. For example, a magnitude or amplitude envelope of a signal to be modulated can be scaled and used to drive a node, such as a drain, of the power amplifier circuit. An envelope tracking signal can be generated such as having a bandwidth that is compressed as compared to a full-bandwidth envelope signal. A peak-value “look ahead” technique can be used, for example, so that amplitude compression or clipping of the transmit signal is suppressed when the bandwidth-compressed envelope tracking signal is used to modulate a supply node of the power amplifier used to amplify the transmit signal.

Abstract: An envelope tracking scheme can be used, such as to modulate a supply node of a power amplifier circuit to improve efficiency. For example, a magnitude or amplitude envelope of a signal to be modulated can be scaled and used to drive a node, such as a drain, of the power amplifier circuit. An envelope tracking signal can be generated such as having a bandwidth that is compressed as compared to a full-bandwidth envelope signal. A peak-value “look ahead” technique can be used, for example, so that amplitude compression or clipping of the transmit signal is suppressed when the bandwidth-compressed envelope tracking signal is used to modulate a supply node of the power amplifier used to amplify the transmit signal.

Abstract: A packaging system for a single ammunition includes a cylindrical metal container and a cap therefore. A locking mechanism locks the cap to the top end of the container and a guiding mechanism guides the cap onto the top end of the container before the locking mechanism is locked to assure proper alignment. A plurality of impact rings are located laterally about the container and the cap to provide impact protection therefore. A stacking mechanism for each container allows a plurality of the containers to be securely stacked adjacent one another. The stacking mechanism includes a first top member and a second top member located adjacent the top ring and located 180° from one another about the cap such that the first top member of one cap interlocks with the second top member of an adjacent cap, and a similar arrangement on the bottom ring of the container.