Abstract: An adaptable LDO regulator includes an error amplifier providing an error voltage according to a difference between a feedback voltage and a reference voltage, first and second pass transistors each having a first current electrode for receiving an input voltage, a control electrode for receiving the error voltage, and a second current electrode, the second current electrode of the second pass transistor providing an output voltage, a voltage divider generating the feedback voltage in response to a voltage on an input thereof, and a mode selection network that in a closed loop mode, couples the second current electrodes of the first and second pass transistors together and to the input of the voltage divider, and in an open loop mode, couples the second current electrode of the first pass transistor to the input of the voltage divider and decouples the second current electrodes of the first and second pass transistors.

Abstract: An adaptable LDO regulator includes an error amplifier providing an error voltage according to a difference between a feedback voltage and a reference voltage, first and second pass transistors each having a first current electrode for receiving an input voltage, a control electrode for receiving the error voltage, and a second current electrode, the second current electrode of the second pass transistor providing an output voltage, a voltage divider generating the feedback voltage in response to a voltage on an input thereof, and a mode selection network that in a closed loop mode, couples the second current electrodes of the first and second pass transistors together and to the input of the voltage divider, and in an open loop mode, couples the second current electrode of the first pass transistor to the input of the voltage divider and decouples the second current electrodes of the first and second pass transistors.

Abstract: A transceiver apparatus for wireless communication includes components coupled to one another to form transmit chains for wireless communications. The components forming the transmit chains include power amplifiers (PA)s each coupled at a respective signal input to a corresponding one of the transmit chains for amplifying radio frequency (RF) signals of a wireless communication link and each power amplifier having a supply voltage input for powering the power amplifier, voltage sources having distinct voltage levels, and PA supply voltage detectors each coupled at an input to an associated one of the transmit chains to detect changes in an amplitude of the signal on each transmit chain. The transceiver apparatus includes a link power circuit coupled to the PA supply voltage detectors, the link power circuit to determine maximum voltage levels to be applied to the supply voltage inputs of the PAs.

Abstract: A transceiver apparatus for wireless communication includes components coupled to one another to form transmit chains for wireless communications. The components forming the transmit chains include power amplifiers (PA)s each coupled at a respective signal input to a corresponding one of the transmit chains for amplifying radio frequency (RF) signals of a wireless communication link and each power amplifier having a supply voltage input for powering the power amplifier, voltage sources having distinct voltage levels, and PA supply voltage detectors each coupled at an input to an associated one of the transmit chains to detect changes in an amplitude of the signal on each transmit chain. The transceiver apparatus includes a link power circuit coupled to the PA supply voltage detectors, the link power circuit to determine maximum voltage levels to be applied to the supply voltage inputs of the PAs.

Abstract: A wireless transceiver including: antennas, components forming transmit and receive chains coupled to the antennas for MIMO communications, voltage sources, power amplifier supply voltage detectors and regulated switches. The components forming the transmit chains include power amplifiers (PA)s each coupled to a corresponding one of the transmit chains for amplifying RF signals of a MIMO communication link and each PA having a supply voltage input. The PA supply voltage detectors each couple to an associated one of the transmit chains to detect changes in an amplitude of the signal thereon and to identify required changes in the supply voltage level of the corresponding PA for transmission of the signal. The regulated switches couple the voltage sources and PAs, and are responsive to each PA's supply voltage detector to switchably couple the supply voltage input of each PA to the voltage sources providing the identified voltage levels during transmission.